Host modes and host mode options

00 Standard

When registering Red Hat Linux server hosts or IRIX server hosts in the host group.

For important information, see Considerations for 00 Standard host mode and 2C Windows Extension host mode below.

01 (Deprecated) VMware

Do not select this host mode. Select host mode 21 VMware Extension instead.

03 HP

When registering HP-UX server hosts in the host group.

05 OpenVMS

When registering OpenVMS server hosts in the host group.

07 Tru64

When registering Tru64 server hosts in the host group.

09 Solaris

When registering Solaris server hosts in the host group.

0A NetWare

When registering NetWare server hosts in the host group.

0C (Deprecated) Windows

Do not select this host mode. Select host mode 2C Windows Extension instead.

0F AIX

When registering AIX server hosts in the host group.

When host mode 0F AIX is set, NACA ( Normal Auto Contingent Allegiance) is enabled automatically. To ensure that the host responds correctly to a port with host mode 0F AIX enabled:

1. Shut down the host to be connected to the port.
2. Set the host mode on the port to 0F AIX, and enable the desired HMOs.
3. Connect the cables from the host to the port.
4. Boot the host.

Caution: If the host mode of a port is changed to 0F AIX and the host had already recognized the Inquiry response for an LDEV on the port before host mode 0F AIX was set, the host might experience loss of device access (LDEV or LU). The host must be rebooted after the host mode is changed to 0F AIX to recognize the change in the response to the standard inquiry.

21 VMware Extension

When registering VMware server hosts in the host group. If the virtual host on VMware recognizes LUs by the Raw Device Mapping (RDM) method, set the host mode for the OS of the virtual host.*

Example: If the LUs are formatted as VMFS (where virtual machines and their VMDKs usually reside), set host mode 21. If the LUs are formatted as a specific file system format (for example, NTFS) and have application requirements to be presented directly to a virtual machine as an RDM, set the host mode for that OS or file system. For example, if the LUs are formatted as NTFS, set host mode 2C Windows Extension).

A common example of VMs with this mix:

• C: drive – OS VMDK on VMFS
• D: drive – RDM for application data

2C Windows Extension

When registering Windows server hosts in the host group.

For important information, see Considerations for 00 Standard host mode and 2C Windows Extension host mode below.

2

VERITAS Database Edition/ Advanced Cluster

Oracle Solaris Cluster (Sun Cluster)

When VERITAS Database Edition/Advanced Cluster for Oracle Real Application Clusters or VERITAS Cluster Server 4.0 or later (I/O fencing function) is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

6

TPRLO

When all of the following conditions are satisfied:

• The host mode 0C (Deprecated) Windows or 2C Windows Extension is used.
• The Emulex host bus adapter is used.
• The mini-port driver is used.
• TPRLO=2 is specified for the mini-port driver parameter of the host bus adapter.

7

Automatic recognition function of LUN

When all of the following conditions are satisfied:

• The host mode 00 Standard or 09 Solaris is used.
• SUN StorEdge SAN Foundation Software Version 4.2 or later is used.
• You want to automate recognition of increase and decrease of devices when genuine SUN HBA is connected.

12

No display for ghost LUN

When all of the following conditions are satisfied:

• The host mode 03 HP is used.
• You want to suppress creation of device files for devices to which paths are not defined.

13

SIM report at link failure¹

When you want to be informed by SIM (service information message) that the number of link failures detected between ports exceeds the threshold.

14

HP TruCluster with TrueCopy function

When all of the following conditions are satisfied:

• The host mode 07 Tru64 is used.
• You want to use TruCluster to set a cluster to each of primary volume and secondary volume for TrueCopy or Universal Replicator.

15

HACMP/PowerHA®

When all of the following conditions are satisfied:

• The host mode 0F AIX is used.
• HACMP* or PowerHA® is used.

* HACMP 4.5 version 4.5.0.13 or later, HACMP 5.1 version 5.1.0.4 or later, or HACMP 5.2 or later.

22

Veritas Cluster Server

Oracle Solaris Cluster (Sun Cluster)

When Veritas Cluster Server is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

25

Support SPC-3 behavior on Persistent Reservation

When one of the following conditions is satisfied:

• Using Windows Server Failover Clustering (WSFC)
• Using Microsoft Failover Cluster (MSFC)
• Using Symantec Cluster Server, also known as Veritas Cluster Server (VCS)
• Using a configuration other than above with the PERSISTENT RESERVE OUT (Service Action=REGISTER AND IGNORE EXISTING KEY) command, change the status response from Reservation-Conflict to Good-Status when there is not a registered key to be deleted.

33

Set/Report Device Identifier enable

When all of the following conditions are satisfied:

• Host mode 03 HP or 05 OpenVMS¹ is used.
• You want to enable commands to assign a nickname of the device.
• You want to set UUID to identify a logical volume from the host.

39

Change the nexus specified in the SCSI Target Reset

When you want to control the following ranges per host group when receiving Target Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

40

V-VOL expansion

When all of the following conditions are satisfied:

• The host mode 0C (Deprecated) Windows or 2C Windows Extension is used.
• You want to automate recognition of the DP-VOL capacity after increasing the DP-VOL capacity.

43

Queue Full Response

When the command queue is full in your storage system connecting with the HP-UX host, and if you want to respond Queue Full, instead of Busy, from the storage system to the host.

51

Round Trip Set Up Option³

If you want to adjust the response time of the host I/O, for example when the distance between MCU and RCU of the TrueCopy (or global-active device) pair is long (approximately 100 kilometers) and Point-to-Point topology is used.

54

(VAAI) Support Option for the EXTENDED COPY command

When the VAAI (vStorage API for Array Integration) function of VMware ESX/ESXi 4.1 or later is used.

60

LUN0 Change Guard

When HP-UX 11.31 is used and you want to suppress addition or deletion of LUN 0.

63

(VAAI) Support Option for vStorage APIs based on T10 standards

When you connect the storage system to VMware ESXi 5.0 or later and use the VAAI function for T10. Use a combination of this host mode option and host mode option 54.

68

Support Page Reclamation for Linux

When using the Page Reclamation function from the environment which is being connected to the Linux host.

71

Change the Unit Attention for Blocked Pool-VOLs

When you want to change the unit attention (UA) from NOT READY to MEDIUM ERROR during the pool-VOLs blockade.

73

Support Option for WS2012

When using following functions provided by Windows Server 2012 (WS2012) or later from the environment which is being connected to the WS2012 or later.

• Dynamic Provisioning function
• Offload Data Transfer (ODX) function

78

The non-preferred path option

When all of following conditions are satisfied:

• Global-active device is used in the configuration with the data centers (Metro configuration).
• Hitachi Dynamic Link Manager is used as the alternative path software.
• The host group is on the non-optimized path of Hitachi Dynamic Link Manager.
• The performance deterioration of I/O responses can be avoided without I/O using the non-optimized path of Hitachi Dynamic Link Manager.

80

Multi Text OFF

By using the iSCSI interface, if the storage system connects with the host of which OS is not supported of the Multi Text function. For instance, connecting the storage system and the host of RHEL5.0 which does not support the Multi Text-function.

81

NOP-In Suppress Mode

In the environment by iSCSI connection, the delay replying of the Delayed Acknowledgment function which is located on the upper layer is restrained by sending NOP-IN of executing of sense commands such as Inquiry, Test unit ready, or Mode sense. However, select this option when connecting the storage system and the host which is not necessary of the NOP-IN sending. However, when connecting the storage system and the host which does not need of the NOP-IN sending, select this option.

For instance:

• When connecting the storage system and the Open Enterprise Server of Novell Co., Ltd.
• When connecting the storage system and winBoot/i of emBoot Co., Ltd..

82

Discovery CHAP Mode

Select this option when the CHAP authentication is performed at the time of the discovery login In the iSCSI connection environment.

For instance: When the CHAP authentication is performed at the time of the discovery login in the iSCSI environment of the VMware host and storage system.

83

Report iSCSI Full Portal List Mode

When configuring alternate paths in the environment of connecting the VMware host and storage system: If waiting of replying of the target information from the host option mode 83 enabled port other than ports of discovery login, select this host mode option.

Apply this host mode option when all of the following conditions are met:

• Configuring alternate paths in the environment of connecting the VMware host and storage system.
• Waiting for replying of the target information from the ports other than ports of discovery login.

88

Nondisruptive migration with HP-UX hosts

When converging multiple host-target ports used in the migration source storage system on the migration target storage system, and enable LUN path definition from a host group belonging to a virtual storage machine to an LDEV defined in a different virtual storage machine.

• ON: LUN path definition is enabled.
• OFF: LUN path definition is disabled.

Note:

1. Apply this host mode option when all the following conditions are met:

   - You are using the nondisruptive migration function to migrate volumes in multiple old storage models that use the same server.

   - You need to reduce the number of Target ports used on the migration target storage system.

   - The host is an HP-UX server.

2. Applying this option to a server other than HP-UX can cause the following:

   - Path addition from the server to the migration target storage system might fail.

   - Display of devices that the server recognizes might be invalid.

3. If a LUN path is defined to an LDEV defined in a virtual storage machine different from the one to which the host group belongs, this option cannot be set to OFF.

91

Disable I/O wait for OpenStack Option

When manually creating host groups (for Fibre Channel) or iSCSI targets (for iSCSI) that are used as the I/O data paths for OpenStack.

96

Change the nexus specified in the SCSI Logical Unit Reset

When you want to control the following ranges per host group when receiving LU Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

102

(GAD) Standard Inquiry Expansion for Hitachi Command Suite

When all of the following conditions are satisfied:

• The OS of the host is Windows (host mode 0C (Deprecated) Windows or 2C Windows Extension) or AIX (host mode 0F AIX), and the MPIO function is used.
• Global-active device (GAD) or nondisruptive migration (NDM) is used.
• Hitachi Device Manager (HDvM) agent is used.

105

Task Set Full response in the event of I/O overload

When all of following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• You want to return Task Set Full response from the storage system to the host when an overload of I/Os occurs on the storage system.

110

ODX support for WS2012

When ODX (Offload Data Transfer) provided by Windows Server 2012 or later is used, in the environment with which the WS2012 or later host connects.

113

iSCSI CHAP Authentication Log⁴

When the result of the CHAP authentication is output to the audit log (DKC).

114

The automatic asynchronous reclamation on ESXi 6.5 or later

When connecting to VMware ESXi 6.5 or later, and when using the zero data page reclamation function which is performed automatically if files on the VMFS (Virtual Machine File System) are deleted.

Use a combination of this host mode option and host mode option 63.

Notes:

1. Configure these host mode options only when requested to do so.
2. Set the UUID when you set host mode option 33 and host mode 05 openvms is used.
3. Set the host mode option 51 for ports on the remote site of the Hitachi TrueCopy® pair or the global-active device pair.
4. The setting of this host mode option is effective on a per-port basis. Set this host mode option in the iSCSI target 00 of the port.

00 Standard

When registering Red Hat Linux server hosts or IRIX server hosts in the host group.

For important information, see Considerations for 00 Standard host mode and 2C Windows Extension host mode below.

01 (Deprecated) VMware

Do not select this host mode. Select host mode 21 VMware Extension instead.

03 HP

When registering HP-UX server hosts in the host group

05 OpenVMS

When registering OpenVMS server hosts in the host group

07 Tru64

When registering Tru64 server hosts in the host group

09 Solaris

When registering Solaris server hosts in the host group

0A NetWare

When registering NetWare server hosts in the host group

0C (Deprecated) Windows

Do not select this host mode. Select host mode 2C Windows Extension instead.

0F AIX

When registering AIX server hosts in the host group.

1. Shut down the host to be connected to the port.
2. Set the host mode on the port to 0F AIX, and enable the desired HMOs.
3. Connect the cables from the host to the port.
4. Boot the host.

Caution: If the host mode of a port is changed to 0F AIX and the host had already recognized the Inquiry response for an LDEV on the port before host mode 0F AIX was set, the host might experience loss of device access (LDEV or LU). The host must be rebooted after the host mode is changed to 0F AIX to recognize the change in the response to the standard inquiry.

21 VMware Extension

When registering VMware server hosts in the host group. If the virtual host on VMware recognizes LUs by the Raw Device Mapping (RDM) method, set the host mode for the OS of the virtual host.*

Example: If the LUs are formatted as VMFS (where virtual machines and their VMDKs usually reside), set host mode 21. If the LUs are formatted as a specific file system format (for example, NTFS) and have application requirements to be presented directly to a virtual machine as an RDM, set the host mode for that OS or file system. For example, if the LUs are formatted as NTFS, set host mode 2C Windows Extension).

A common example of VMs with this mix:

• C: drive – OS VMDK on VMFS
• D: drive – RDM for application data

2C Windows Extension

When registering Windows server hosts in the host group.

For important information, see Considerations for 00 Standard host mode and 2C Windows Extension host mode below.

2

VERITAS Database Edition/ Advanced Cluster

Oracle Solaris Cluster (Sun Cluster)

When VERITAS Database Edition/Advanced Cluster for Oracle Real Application Clusters or VERITAS Cluster Server 4.0 or later (I/O fencing function) is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

6

TPRLO (Third-party process layout)

When all of the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• The Emulex host bus adapter is used.
• The mini-port driver is used.
• TPRLO=2 is specified for the mini-port driver parameter of the host bus adapter.

7

Automatic recognition function of LUN

When all of the following conditions are satisfied:

• The host mode 00 Standard or 09 Solaris is used.
• SUN StorEdge SAN Foundation Software Version 4.2 or later is used.
• You want to automate recognition of increase and decrease of devices when genuine SUN HBA is connected.

Enable this HMO when connected to Hitachi NAS Platform version 12.5 or later.

Note: When you use Hitachi Ops Center Administrator to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

12

No display for ghost LUN

When all of the following conditions are satisfied:

• The host mode 03 HP is used.
• You want to suppress creation of device files for devices to which paths are not defined.

13

SIM report at link failure¹

When you want to be informed by SIM (service information message) that the number of link failures detected between ports exceeds the threshold.

14

HP TruCluster with TrueCopy function

When all of the following conditions are satisfied:

• The host mode 07 Tru64 is used.
• You want to use TruCluster to set a cluster to each of primary volume and secondary volume for TrueCopy or Universal Replicator.

15

HACMP/PowerHA®

When all of the following conditions are satisfied:

• The host mode 0F AIX is used.
• HACMP* or PowerHA® is used.

* HACMP 4.5 version 4.5.0.13 or later, HACMP 5.1 version 5.1.0.4 or later, or HACMP 5.2 or later.

22

Veritas Cluster Server

Oracle Solaris Cluster (Sun Cluster)

When Veritas Cluster Server is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

25

Support SPC-3 behavior on Persistent Reservation

When running the PERSISTENT RESERVE OUT (Service Action = REISTER AND IGNORE EXISTING KEY) command, if there is no reserved key, response is changed depending on the option setting as follows.

Mode 25 = ON: Good Status (SPC-3 response) is returned without any processing.

Mode 25 = OFF (default): Reservation Conflict (SPC-2 response) is returned.

Notes:

1. The option is applied if the following are used while there is no reserved key to delete when running the PERSISTENT RESERVE OUT command:
   • Windows Server Failover Clustering (WSFC)
   • Microsoft Failover Cluster (MSFC)
   • Symantec Cluster Server (Previously named as Veritas Cluster Server (VCS))
2. Depending on host type, the response when the option is set to OFF is expected.

33

Set/Report Device Identifier enable

When all of the following conditions are satisfied:

• Host mode 03 HP or 05 OpenVMS² is used. Set the UUID when you set HMO 33 and host mode 05 OpenVMS is used.
• You want to enable commands to assign a nickname of the device.
• You want to set UUID to identify a logical volume from the host.

39

Change the nexus specified in the SCSI Target Reset

When you want to control the following ranges per host group when receiving Target Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

40

V-VOL expansion

When all of the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• You want to automate recognition of the DP-VOL capacity after increasing the DP-VOL capacity.

41

Prioritized device recognition command

When you want to execute commands to recognize the device preferentially.

43

Queue Full Response

When the command queue is full in your storage system connecting with the HP-UX host, and if you want to respond Queue Full, instead of Busy, from the storage system to the host.

49

BB Credit Set Up Option1

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the Fibre Channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 50.

50

BB Credit Set Up Option2

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the Fibre Channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 49.

51

Round Trip Set Up Option

If you want to adjust the response time of the host I/O, for example when the distance between MCU and RCU of the TrueCopy (or global-active device) pair is long (approximately 100 kilometers) and Point-to-Point topology is used.

54

(VAAI) Support Option for the EXTENDED COPY command

When the VAAI (vStorage API for Array Integration) function of VMware ESX/ESXi 4.1 or later is used.

60

LUN0 Change Guard

When HP-UX 11.31 is used, and when you want to prevent adding or deleting of LUN0.

63

(VAAI) Support Option for vStorage APIs based on T10 standards

When you connect the storage system to VMware ESXi 5.0 and use the VAAI function for T10.

67

Change of the ED_TOV value

When the OPEN fibre channel port configuration applies to following:

• The topology is the Fibre Channel direct connection.
• The port type is Target or RCU Target.

68

Support Page Reclamation for Linux

When using the Page Reclamation function from the environment which is being connected to the Linux host.

When connected to NAS platform to allow the NAS host to retrieve Dynamic Provisioning information and support the SCSI UNMAP command.

Note: When you use Hitachi Ops Center Administrator to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

71

Change the Unit Attention for Blocked Pool-VOLs

When you want to change the unit attention (UA) from NOT READY to MEDIUM ERROR during the pool-VOLs blockade.

72

AIX GPFS Support

When using General Parallel File System (GPFS) in the storage system connecting to the AIX host.

73

Support Option for WS2012

When using following functions provided by Windows Server 2012 (WS2012) from the environment which is being connected to the WS2012 or later.

• Dynamic Provisioning function
• Offload Data Transfer (ODX) function

Microcode: DKCMAIN 80-01-22-00/00 and later.

78

The non-preferred path option

When all of following conditions are satisfied:

• Global-active device is used in the configuration with the data centers (Metro configuration).
• Hitachi Dynamic Link Manager is used as the alternative path software.
• The host group is on the non-optimized path of Hitachi Dynamic Link Manager.
• The performance deterioration of I/O responses can be avoided without I/O using the non-optimized path of Hitachi Dynamic Link Manager.

Microcode: DKCMAIN 80-01-42-00/00 and later.

80

Multi Text OFF

By using the iSCSI interface, if the storage system connects with the host of which OS is not supported of the Multi Text function. For instance, connecting the storage system and the host of RHEL5.0 which does not support the Multi Text-function.

Microcode: DKCMAIN 80-03-31-00/00 and later.

81

NOP-In Suppress Mode

In the environment by iSCSI connection, the delay replying of the Delayed Acknowledgment function which is located on the upper layer is restrained by sending NOP-IN of executing of sense commands such as Inquiry, Test unit ready, or Mode sense. However, select this option when connecting the storage system and the host which is not necessary of the NOP-IN sending. However, when connecting the storage system and the host which does not need of the NOP-IN sending, select this option.

For instance:

• When connecting the storage system and the Open Enterprise Server of Novell Co., Ltd.
• When connecting the storage system and winBoot/i of emBoot Co., Ltd..

Microcode: DKCMAIN 80-03-31-00/00 and later.

82

Discovery CHAP Mode

Select this option when the CHAP authentication is performed at the time of the discovery login In the iSCSI connection environment.

For instance: When the CHAP authentication is performed at the time of the discovery login in the iSCSI environment of the VMware host and storage system

Microcode: DKCMAIN 80-03-31-00/00 and later.

83

Report iSCSI Full Portal List Mode

When configuring alternate paths in the environment of connecting the VMware host and storage system: If waiting of replying of the target information from the host option mode 83 enabled port other than ports of discovery login, select this host mode option.

Apply this host mode option when all of the following conditions are met:

• Configuring alternate paths in the environment of connecting the VMware host and storage system.
• Waiting for replying of the target information from the ports other than ports of discovery login.

Microcode: DKCMAIN 80-03-31-00/00 and later.

88

Nondisruptive migration with HP-UX hosts

When converging multiple host-target ports used in the migration source storage system on the migration target storage system, and enable LUN path definition from a host group belonging to a virtual storage machine to an LDEV defined in a different virtual storage machine.

• ON: LUN path definition is enabled.
• OFF: LUN path definition is disabled.

Microcode: DKCMAIN 80-02-01-00/01 and later.

Note:

1. Apply this host mode option when all the following conditions are met:

   - You are using the nondisruptive migration function to migrate volumes in multiple old storage models that use the same server.

   - You need to reduce the number of Target ports used on the migration target storage system.

   - The host is an HP-UX server.

2. Applying this option to a server other than HP-UX can cause the following:

   - Path addition from the server to the migration target storage system might fail.

   - Display of devices that the server recognizes might be invalid.

3. If a LUN path is defined to an LDEV defined in a virtual storage machine different from the one to which the host group belongs, this option cannot be set to OFF.

96

Change the nexus specified in the SCSI Logical Unit Reset

When you want to control the following ranges per host group when receiving LU Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

97

Proprietary ANCHOR command support

This option is used to support the Proprietary ANCHOR command (operation code=0xC1).

HMO 97 = ON: The Proprietary ANCHOR command is supported.

HMO 97 = OFF (default): The Proprietary ANCHOR command is not supported.

Microcode: DKCMAIN 80-03-31-00/00 and later.

Notes:

1. The option is applied when using the Proprietary ANCHOR command in the HNAS environment.
2. The option is used only in the HNAS environment. Any other environments than HNAS do not issue the Proprietary ANCHOR command.
3. When the option is set to ON, make sure that SOM 1079 (a system option mode to disable Proprietary ANCHOR command) is set to OFF.

SOM 1079 is used to disable the Proprietary ANCHOR command so as to enable microcode downgrade from a version that supports the Proprietary ANCHOR command to a version that does not support the command.

If SOM 1097 is set to ON, the Proprietary ANCHOR command cannot be run even when HMO 97 is set to ON.

102

(GAD) Standard Inquiry Expansion for Hitachi Command Suite

When all of the following conditions are satisfied:

• The OS of the host is Windows or AIX, and the MPIO function is used.
• Global-active device (GAD) or nondisruptive migration (NDM) is used.
• Hitachi Device Manager (HDvM) agent is used.

105

Task Set Full response in the event of I/O overload

When all of following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• You want to return Task Set Full response from the storage system to the host when an overload of I/Os occurs on the storage system.

Notes:

1. Configure these host mode options only when requested to do so.
2. Set the UUID when you set host mode option 33 and host mode 05 openvms is used.

When registering another VSP storage system in the host group for mapping by using Universal Volume Manager.

If this mode is used when the VSP is being used as external storage of another VSP storage system, the data of the MF-VOL in the VSP storage system can be transferred. Refer to emulation types below for the MF-VOL.

The data of the MF-VOL cannot be transferred when the storage systems are connected with the host mode other than “4C UVM”, and a message requiring formatting appears after the mapping. In this case, cancel the message requiring formatting, and set the host mode to “4C UVM” when you want to transfer data.

The following device types can be transferred: 3390-3A, 3380-KA, 3380-3A, 3390 9A, 3390-LA.

Notes:

• If Windows server hosts are registered in a host group, ensure that the host mode of the host group is 0C Windows or 2C Windows Extension.

  If the host mode of a host group is 0C Windows and an LU path is defined between the host group and a logical volume, the logical volume cannot be combined with other logical volumes to form a LUSE volume (that is, an expanded LU).

  If the host mode of a host group is 2C Windows Extension and an LU path is defined between the host group and a logical volume, the logical volume can be combined with other logical volumes to form a LUSE volume (that is, an expanded LU). If you plan to expand LUs by using LUSE in the future, set the host mode 2C Windows Extension.

• If VMware server hosts are registered in a host group, ensure that the host mode of the host group is 01 VMware or 21 VMware Extension.

  If the host mode of a host group is 01 VMware and an LU path is defined between the host group and a logical volume, the logical volume cannot be combined with other logical volumes to form a LUSE volume (that is, an expanded LU).

  If the host mode of a host group is 21 VMware Extension and an LU path is defined between the host group and a logical volume, the logical volume can be combined with other logical volumes to form a LUSE volume (that is, an expanded LU). If you plan to expand LUs by using LUSE in the future, set the host mode 21 VMware Extension.

• If you plan to expand LUs by using LUSE in case of Windows virtual host on VMware recognizing LU by Raw Device Mapping (RDM) method, set the host mode 2C Windows Extension. If the host mode 2C Windows Extension is not set, change the host mode to 2C. Before changing the host mode, back up the LUSE volume. After changing the mode, restore the LUSE volume.

• Besides the host modes mentioned above, the Host Mode list displays the Reserve host modes. Please do not select any Reserve host mode without assistance from technical support.

• When host mode 0F for AIX is set, NACA is enabled automatically. Take the following steps to ensure that the host responds correctly to a port with host mode 0F enabled:
  1. Shut down the host to be connected to the port.
  2. Set the host mode on the port to 0F.
  3. Connect the cables from the host to the port.
  4. Boot the host.

  Caution: If the host mode of a port is changed to 0F and the host already recognized the Inquiry response for an LDEV on the port with host mode other than 0F, the host might experience loss of device (LDEV or LUN) access. The host must be rebooted after host mode 0F is set to recognize the change in the response of the standard inquiry.

VERITAS Database Edition / Advanced Cluster

Oracle Solaris Cluster (Sun Cluster)

Use when VERITAS Database Edition/Advanced Cluster for Real Application Clusters or VERITAS Cluster Server 4.0 or later (I/O fencing function) is used.

Use when Oracle Solaris Cluster (Sun Cluster) is used.

TPRLO (Third-party process layout)

Use when all the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used
• The Emulex host bus adapter is used
• The mini-port driver is used
• TPRLO=2 is specified for the mini-port driver parameter of the host bus adapter

Automatic recognition function of LUN

Use when all the following conditions are satisfied:

• The host mode 00 Standard or 09 Solaris is used.
• SUN StorEdge SAN Foundation Software Version 4.2 or later is used
• You want to automate recognition of increase and decrease of devices when genuine SUN HBA is connected.

Enable this HMO when connected to Hitachi NAS Platform version 12.5 or later.

Note: When you use Hitachi Storage Advisor (HSA) to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

No display for ghost LUN

Use when all the following conditions are satisfied:

• The host mode 03 HP is used.
• You want to suppress creation of device files for devices to which paths are not defined.

SIM report at link failure1

Use when you want to be informed by SIM (service information message) that the number of link failures detected between ports exceeds the threshold.

HP TruCluster with TrueCopy function

Use when all the following conditions are satisfied:

• The host mode 07 Tru64 is used.
• You want to use TruCluster to set a cluster to each of P-VOL and S-VOL for TrueCopy or Universal Replicator.

HACMP/PowerHA®

Use when all the following conditions are satisfied:

• The host mode 0F AIX is used.
• HACMP* or PowerHA® is used.

* HACMP 4.5 version 4.5.0.13 or later, HACMP 5.1 version 5.1.0.4 or later, or HACMP 5.2 or later.

Veritas Cluster Server

Oracle Solaris Cluster (Sun Cluster)

Use when Veritas Cluster Server is used.

Use when Oracle Solaris Cluster (Sun Cluster) is used.

Set/Report Device Identifier enable

Use when all the following conditions are satisfied:

• Host mode 03 HP or 05 OpenVMS² is used. Set the UUID when you set HMO 33 and host mode 05 OpenVMS is used.
• You want to enable commands to assign a nickname of the device.
• You want to set UUID to identify a logical volume from the host.

Change the nexus specified in the SCSI Target Reset

When you want to control the following ranges per host group when receiving Target Reset:

• Range of job resetting.

• Range of UAs (Unit Attentions) defined.

V-VOL expansion

When all of the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used
• You want to automate recognition of the DP-VOL capacity after increasing the DP-VOL capacity.

Prioritized device recognition command

When you want to execute commands to recognize the device preferentially.

Prevent “OHUB PCI retry”

When IBM Z10 Linux is used.

Queue Full Response

When the command queue is full in the VSP storage system connecting with the HP-UX host, and if you want to respond Queue Full, instead of Busy, from the storage system to the host.

HAM S-VOL Read

When you do not want to generate the failover from MCU to RCU, and when the applications that issue the Read commands more than the threshold to S-VOL of the pair made with High Availability Manager are performed.

BB Credit Set Up Option1³

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the fibre channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 50.

BB Credit Set Up Option2³

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the fibre channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 49.

Round Trip Set Up Option³

If you want to adjust the response time of the host I/O, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 65.

Note: Set host mode option 51 for both ports on MCU and RCU.

HAM and Cluster software for SCSI-2 Reserve

When a cluster software using the SCSI-2 reserve is used in the High Availability Manager environment.

(VAAI) Support Option for the EXTENDED COPY command

When the VAAI (vStorage API for Array Integration) function of VMware ESX/ESXi 4.1 is used.

HAM response change

When you use 0C Windows, 2C Windows Extension, 01 VMware, or 21 VMware Extention as the host mode in the High Availability Manager environment.

LUN0 Change Guard

When HP-UX 11.31 is used, and when you want to prevent adding or deleting of LUN0.

Expanded Persistent Reserve Key

Increases Reservation Keys from 128 to 2,048.

(VAAI) Support Option for vStorage APIs based on T10 standards

When you connect the storage system to VMware ESXi 5.0 and use the VAAI function for T10.

Round Trip extended set up option3

If you want to adjust the response time of the host I/O when you use the host mode option 51 and the host connects the TrueCopy pair. For example, when the configuration using the maximum number of processor blades is used.

Use the combination of this host mode option and the host mode option 51.

Change of the ED_TOV value

When the OPEN fibre channel port configuration applies to following:

• The topology is the Fibre Channel direct connection.
• The port type is Target or RCU Target.

Support Page Reclamation for Linux

When using the Page Reclamation function from the environment which is being connected to the Linux host.

When connected to Hitachi NAS Platform to allow the NAS host to retrieve thin provisioning information and support the SCSI UNMAP command.

Note: When you use Hitachi Ops Center Administrator (Administrator) to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

Online LUSE expansion

When you want the host to be notified of expansion of LUSE volume capacity.

Change the Unit Attention for Blocked Pool-VOLs

When you want to change the unit attention (UA) from NOT READY to MEDIUM ERROR during the pool-VOLs blockade.

AIX GPFS Support

When using General Parallel File System (GPFS) in the VSP storage system connecting to the AIX host.

Support Option for WS2012

When using the following functions provided by Windows Server 2012 (WS2012) from an environment which is being connected to the WS2012:

• Thin Provisioning function

• Offload Data Transfer (ODX) function

Notes:

1. Configure these host mode options only when requested to do so.
2. Set the UUID when you set host mode option 33 and host mode 05 OpenVMS is used.
3. Host mode options 49, 50, 51, and 65 are enabled only for the 8UFC/16UFC package.

00 Standard

When registering Red Hat Linux server hosts or IRIX server hosts in the host group.

For important information, see Considerations for 00 Standard host mode and 2C Windows Extension host mode below.

01 (Deprecated) VMware

Do not select this host mode. Select host mode 21 VMware Extension instead.

03 HP

When registering HP-UX server hosts in the host group.

05 OpenVMS

When registering OpenVMS server hosts in the host group.

07 Tru64

When registering Tru64 server hosts in the host group.

09 Solaris

When registering Solaris server hosts in the host group.

0A NetWare

When registering NetWare server hosts in the host group.

0C (Deprecated) Windows

Do not select this host mode. Select host mode 2C Windows Extension instead.

0F AIX

When registering AIX server hosts in the host group.

When host mode 0F AIX is set, NACA ( Normal Auto Contingent Allegiance) is enabled automatically. To ensure that the host responds correctly to a port with host mode 0F AIX enabled:

1. Shut down the host to be connected to the port.
2. Set the host mode on the port to 0F AIX, and enable the desired HMOs.
3. Connect the cables from the host to the port.
4. Boot the host.

Caution: If the host mode of a port is changed to 0F AIX and the host had already recognized the Inquiry response for an LDEV on the port before host mode 0F AIX was set, the host might experience loss of device access (LDEV or LU). The host must be rebooted after the host mode is changed to 0F AIX to recognize the change in the response to the standard inquiry.

21 VMware Extension

When registering VMware server hosts in the host group. If the virtual host on VMware recognizes LUs by the Raw Device Mapping (RDM) method, set the host mode for the OS of the virtual host.*

Example: If the LUs are formatted as VMFS (where virtual machines and their VMDKs usually reside), set host mode 21. If the LUs are formatted as a specific file system format (for example, NTFS) and have application requirements to be presented directly to a virtual machine as an RDM, set the host mode for that OS or file system. For example, if the LUs are formatted as NTFS, set host mode 2C Windows Extension).

A common example of VMs with this mix:

• C: drive – OS VMDK on VMFS
• D: drive – RDM for application data

2C Windows Extension

When registering Windows server hosts in the host group.

For important information, see Considerations for 00 Standard host mode and 2C Windows Extension host mode below.

2

VERITAS Database Edition/ Advanced Cluster

Oracle Solaris Cluster (Sun Cluster)

When VERITAS Database Edition/Advanced Cluster for Oracle Real Application Clusters or VERITAS Cluster Server 4.0 or later (I/O fencing function) is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

6

TPRLO

When all of the following conditions are satisfied:

• The host mode 0C (Deprecated) Windows or 2C Windows Extension is used.
• The Emulex host bus adapter is used.
• The mini-port driver is used.
• TPRLO=2 is specified for the mini-port driver parameter of the host bus adapter.

7

Automatic recognition function of LUN

When all of the following conditions are satisfied:

• The host mode 00 Standard or 09 Solaris is used.
• SUN StorEdge SAN Foundation Software Version 4.2 or later is used.
• You want to automate recognition of increase and decrease of devices when genuine SUN HBA is connected.

12

No display for ghost LUN

When all of the following conditions are satisfied:

• The host mode 03 HP is used.
• You want to suppress creation of device files for devices to which paths are not defined.

13

SIM report at link failure¹

When you want to be informed by SIM (service information message) that the number of link failures detected between ports exceeds the threshold.

14

HP TruCluster with TrueCopy function

When all of the following conditions are satisfied:

• The host mode 07 Tru64 is used.
• You want to use TruCluster to set a cluster to each of primary volume and secondary volume for TrueCopy or Universal Replicator.

15

HACMP/PowerHA®

When all of the following conditions are satisfied:

• The host mode 0F AIX is used.
• HACMP* or PowerHA® is used.

* HACMP 4.5 version 4.5.0.13 or later, HACMP 5.1 version 5.1.0.4 or later, or HACMP 5.2 or later.

22

Veritas Cluster Server

Oracle Solaris Cluster (Sun Cluster)

When Veritas Cluster Server is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

25

Support SPC-3 behavior on Persistent Reservation

When one of the following conditions is satisfied:

• Using Windows Server Failover Clustering (WSFC)
• Using Microsoft Failover Cluster (MSFC)
• Using Symantec Cluster Server, also known as Veritas Cluster Server (VCS)
• Using a configuration other than above with the PERSISTENT RESERVE OUT (Service Action=REGISTER AND IGNORE EXISTING KEY) command, change the status response from Reservation-Conflict to Good-Status when there is not a registered key to be deleted

33

Set/Report Device Identifier enable

When all of the following conditions are satisfied:

• Host mode 03 HP or 05 OpenVMS¹ is used.
• You want to enable commands to assign a nickname of the device.
• You want to set UUID to identify a logical volume from the host.

39

Change the nexus specified in the SCSI Target Reset

When you want to control the following ranges per host group when receiving Target Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

40

V-VOL expansion

When all of the following conditions are satisfied:

• The host mode 0C (Depreated) Windows or 2C Windows Extension is used.
• You want to automate recognition of the DP-VOL capacity after increasing the DP-VOL capacity.

43

Queue Full Response

When the command queue is full in your storage system connecting with the HP-UX host, and if you want to respond Queue Full, instead of Busy, from the storage system to the host.

51

Round Trip Set Up Option³

If you want to adjust the response time of the host I/O, for example when the distance between MCU and RCU of the TrueCopy (or global-active device) pair is long (approximately 100 kilometers) and Point-to-Point topology is used.

54

(VAAI) Support Option for the EXTENDED COPY command

When the VAAI (vStorage API for Array Integration) function of VMware ESX/ESXi 4.1 or later is used.

60

LUN0 Change Guard

When HP-UX 11.31 is used and you want to suppress addition or deletion of LUN 0.

63

(VAAI) Support Option for vStorage APIs based on T10 standards

When you connect the storage system to VMware ESXi 5.0 or later and use the VAAI function for T10. Use a combination of this host mode option and host mode option 54.

68

Support Page Reclamation for Linux

When using the Page Reclamation function from the environment which is being connected to the Linux host.

71

Change the Unit Attention for Blocked Pool-VOLs

When you want to change the unit attention (UA) from NOT READY to MEDIUM ERROR during the pool-VOLs blockade.

73

Support Option for WS2012

When using following functions provided by Windows Server 2012 (WS2012) or later from the environment which is being connected to the WS2012 or later.

• Dynamic Provisioning function
• Offload Data Transfer (ODX) function

78

The non-preferred path option

When all of following conditions are satisfied:

• Global-active device is used in the configuration with the data centers (Metro configuration).
• Hitachi Dynamic Link Manager is used as the alternative path software.
• The host group is on the non-optimized path of Hitachi Dynamic Link Manager.
• The performance deterioration of I/O responses can be avoided without I/O using the non-optimized path of Hitachi Dynamic Link Manager.

80

Multi Text OFF

By using the iSCSI interface, if the storage system connects with the host of which OS is not supported of the Multi Text function. For instance, connecting the storage system and the host of RHEL5.0 which does not support the Multi Text-function.

81

NOP-In Suppress Mode

In the environment by iSCSI connection, the delay replying of the Delayed Acknowledgment function which is located on the upper layer is restrained by sending NOP-IN of executing of sense commands such as Inquiry, Test unit ready, or Mode sense. However, select this option when connecting the storage system and the host which is not necessary of the NOP-IN sending. However, when connecting the storage system and the host which does not need of the NOP-IN sending, select this option.

For instance:

• When connecting the storage system and the Open Enterprise Server of Novell Co., Ltd.
• When connecting the storage system and winBoot/i of emBoot Co., Ltd..

82

Discovery CHAP Mode

Select this option when the CHAP authentication is performed at the time of the discovery login In the iSCSI connection environment.

For instance: When the CHAP authentication is performed at the time of the discovery login in the iSCSI environment of the VMware host and storage system

83

Report iSCSI Full Portal List Mode

When configuring alternate paths in the environment of connecting the VMware host and storage system: If waiting of replying of the target information from the host option mode 83 enabled port other than ports of discovery login, select this host mode option.

Apply this host mode option when all of the following conditions are met:

• Configuring alternate paths in the environment of connecting the VMware host and storage system.
• Waiting for replying of the target information from the ports other than ports of discovery login.

88

Nondisruptive migration with HP-UX hosts

When converging multiple host-target ports used in the migration source storage system on the migration target storage system, and enable LUN path definition from a host group belonging to a virtual storage machine to an LDEV defined in a different virtual storage machine.

• ON: LUN path definition is enabled.
• OFF: LUN path definition is disabled.

Note:

1. Apply this host mode option when all the following conditions are met:

   - You are using the nondisruptive migration function to migrate volumes in multiple old storage models that use the same server.

   - You need to reduce the number of Target ports used on the migration target storage system.

   - The host is an HP-UX server.

2. Applying this option to a server other than HP-UX can cause the following:

   - Path addition from the server to the migration target storage system might fail.

   - Display of devices that the server recognizes might be invalid.

3. If a LUN path is defined to an LDEV defined in a virtual storage machine different from the one to which the host group belongs, this option cannot be set to OFF.

91

Disable I/O wait for OpenStack Option

When manually creating host groups (for Fibre Channel) or iSCSI targets (for iSCSI) that are used as the I/O data paths for OpenStack.

96

Change the nexus specified in the SCSI Logical Unit Reset

When you want to control the following ranges per host group when receiving LU Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

102

(GAD) Standard Inquiry Expansion for Hitachi Command Suite

When all of the following conditions are satisfied:

• The OS of the host is Windows (host mode 0C (Deprecated) Windows or 2C Windows Extension) or AIX (host mode 0F AIX), and the MPIO function is used.
• Global-active device (GAD) or nondisruptive migration (NDM) is used.
• Hitachi Device Manager (HDvM) agent is used.

105

Task Set Full response in the event of I/O overload

When all of following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• You want to return Task Set Full response from the storage system to the host when an overload of I/Os occurs on the storage system.

110

ODX support for WS2012

When ODX (Offload Data Transfer) provided by Windows Server 2012 or later is used, in the environment with which the WS2012 or later host connects.

113

iSCSI CHAP Authentication Log⁴

When the result of the CHAP authentication is output to the audit log (DKC).

114

The automatic asynchronous reclamation on ESXi 6.5 or later

When connecting to VMware ESXi 6.5 or later, and when using the zero data page reclamation function which is performed automatically if files on the VMFS (Virtual Machine File System) are deleted.

Use a combination of this host mode option and host mode option 63.

Notes:

1. Configure these host mode options only when requested to do so.
2. Set the UUID when you set host mode option 33 and host mode 05 openvms is used.
3. Set the host mode option 51 for ports on the remote site of the Hitachi TrueCopy® pair or the global-active device pair.
4. The setting of this host mode option is effective on a per-port basis. Set this host mode option in the iSCSI target 00 of the port.

00 Standard

When registering Red Hat Linux server hosts or IRIX server hosts in the host group.

01 (Deprecated) VMware

This host mode has been deprecated. When you first connect a VMware host, set host mode 21.

03 HP

When registering HP-UX server hosts in the host group

05 OpenVMS

When registering OpenVMS server hosts in the host group

07 Tru64

When registering Tru64 server hosts in the host group

09 Solaris

When registering Solaris server hosts in the host group

0A NetWare

When registering NetWare server hosts in the host group

0C (Deprecated) Windows

When registering Windows server hosts in the host group

0F AIX

When registering AIX server hosts in the host group*

21 VMware Extension

When registering VMware server hosts in the host group. If the virtual host on VMware recognizes LUs by the Raw Device Mapping (RDM) method, set the host mode related to OS of the virtual host.

Example: If a LUN/LDEV is formatted as VMFS (where virtual machines and their VMDKs usually reside), it should be set with host mode 21. However, if a LUN/LDEV is formatted as a specific file system format (for example, NTFS) and has application requirements to be presented directly to a virtual machine as an RDM, it should be set to the host mode specific to that OS/filesystem (for example, host mode 2C for Windows).

A common example of VMs with this mix is:

• C: drive – OS VMDK on VMFS
• D: drive – RDM for application data

In this example, 2 different host groups should be created for a single host with different HMOs and LUNs assigned.

2C Windows Extension

When registering Windows server hosts in the host group.

* When host mode 0F for AIX is set, NACA is enabled automatically. Take the following steps to ensure that the host responds correctly to a port with host mode 0F enabled:

1. Shut down the host to be connected to the port.
2. Set the host mode on the port to 0F.
3. Connect the cables from the host to the port.
4. Boot the host.

Caution: If the host mode of a port is changed to 0F and the host already recognized the Inquiry response for an LDEV on the port with host mode other than 0F, the host might experience loss of device (LDEV or LUN) access. The host must be rebooted after host mode 0F is set to recognize the change in the response of the standard inquiry.

2

VERITAS Database Edition/ Advanced Cluster

Oracle Solaris Cluster (Sun Cluster)

When VERITAS Database Edition/Advanced Cluster for Oracle Real Application Clusters or VERITAS Cluster Server 4.0 or later (I/O fencing function) is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

6

TPRLO (Third-party process layout)

When all of the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• The Emulex host bus adapter is used.
• The mini-port driver is used.
• TPRLO=2 is specified for the mini-port driver parameter of the host bus adapter.

7

Automatic recognition function of LUN

When all of the following conditions are satisfied:

• The host mode 00 Standard or 09 Solaris is used.
• SUN StorEdge SAN Foundation Software Version 4.2 or later is used.
• You want to automate recognition of increase and decrease of devices when genuine SUN HBA is connected.

Enable this HMO when connected to Hitachi NAS Platform version 12.5 or later.

Note: When you use Hitachi Ops Center Administrator to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

12

No display for ghost LUN

When all of the following conditions are satisfied:

• The host mode 03 HP is used.
• You want to suppress creation of device files for devices to which paths are not defined.

13

SIM report at link failure¹

When you want to be informed by SIM (service information message) that the number of link failures detected between ports exceeds the threshold.

14

HP TruCluster with TrueCopy function

When all of the following conditions are satisfied:

• The host mode 07 Tru64 is used.
• You want to use TruCluster to set a cluster to each of primary volume and secondary volume for TrueCopy or Universal Replicator.

15

HACMP/PowerHA®

When all of the following conditions are satisfied:

• The host mode 0F AIX is used.
• HACMP* or PowerHA® is used.

* HACMP 4.5 version 4.5.0.13 or later, HACMP 5.1 version 5.1.0.4 or later, or HACMP 5.2 or later.

22

Veritas Cluster Server

Oracle Solaris Cluster (Sun Cluster)

When Veritas Cluster Server is used.

When Oracle Solaris Cluster (Sun Cluster) is used.

25

Support SPC-3 behavior on Persistent Reservation

When one of the following conditions are satisfied:

• Using Windows Server Failover Clustering (WSFC)
• Using Microsoft Failover Cluster (MSFC)
• Using Symantec Cluster Server, also known as Veritas Cluster Server (VCS)
• Using a configuration other than above with the PERSISTENT RESERVE OUT (Service Action=REGISTER AND IGNORE EXISTING KEY) command, change the status response from Reservation-Conflict to Good-Status when there is not a registered key to be deleted

Microcode: DKCMAIN earlier than 83-02-01-20/00

33

Set/Report Device Identifier enable

When all of the following conditions are satisfied:

• Host mode 03 HP or 05 OpenVMS² is used.
• You want to enable commands to assign a nickname of the device.
• You want to set UUID to identify a logical volume from the host.

39

Change the nexus specified in the SCSI Target Reset

When you want to control the following ranges per host group when receiving Target Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

40

V-VOL expansion

When all of the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• You want to automate recognition of the DP-VOL capacity after increasing the DP-VOL capacity.

41

Prioritized device recognition command

When you want to execute commands to recognize the device preferentially.

43

Queue Full Response

When the command queue is full in your storage system connecting with the HP-UX host, and if you want to respond Queue Full, instead of Busy, from the storage system to the host.

49

BB Credit Set Up Option1

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the Fibre Channel, for example when the distance between MCU and RCU of the TrueCopy (or global-active device) pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 50.

50

BB Credit Set Up Option2

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the Fibre Channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 49.

51

Round Trip Set Up Option

If you want to adjust the response time of the host I/O, for example when the distance between MCU and RCU of the TrueCopy (or global-active device) pair is long (approximately 100 kilometers) and Point-to-Point topology is used.

54

(VAAI) Support Option for the EXTENDED COPY command

When the VAAI (vStorage API for Array Integration) function of VMware ESX/ESXi 4.1 or later is used.

60

LUN0 Change Guard

When HP-UX 11.31 is used, and when you want to prevent adding or deleting of LUN0.

63

(VAAI) Support Option for vStorage APIs based on T10 standards

When you connect the storage system to VMware ESXi 5.0 or later and use the VAAI function for T10.

67

Change of the ED_TOV value

When the OPEN fibre channel port configuration applies to following:

• The topology is the Fibre Channel direct connection.
• The port type is Target or RCU Target.

68

Support Page Reclamation for Linux

When using the Page Reclamation function from the environment which is being connected to the Linux host.

When connected to NAS platform (unified or external) to allow the NAS host to retrieve Dynamic Provisioning information and support the SCSI UNMAP command.

Note: When you use Hitachi Ops Center Administrator to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

71

Change the Unit Attention for Blocked Pool-VOLs

When you want to change the unit attention (UA) from NOT READY to MEDIUM ERROR during the pool-VOLs blockade.

72

AIX GPFS Support

When using General Parallel File System (GPFS) in the storage system connecting to the AIX host.

73

Support Option for WS2012

When using following functions provided by Windows Server 2012 (WS2012) from the environment which is being connected to the WS2012 .

• Dynamic Provisioning function
• Offload Data Transfer (ODX) function

78

The non-preferred path option

When all of following conditions are satisfied:

• Global-active device is used in the configuration with the data centers (Metro configuration).
• Hitachi Dynamic Link Manager is used as the alternative path software.
• The host group is on the non-optimized path of Hitachi Dynamic Link Manager.
• The performance deterioration of I/O responses can be avoided without I/O using the non-optimized path of Hitachi Dynamic Link Manager.

Microcode: DKCMAIN 83-01-21-20/00 and later.

80

Multi Text OFF

By using the iSCSI interface, if the storage system connects with the host of which OS is not supported of the Multi Text function. For instance, connecting the storage system and the host of RHEL5.0 which does not support the Multi Text-function.

81

NOP-In Suppress Mode

In the environment by iSCSI connection, the delay replying of the Delayed Acknowledgment function which is located on the upper layer is restrained by sending NOP-IN of executing of sense commands such as Inquiry, Test unit ready, or Mode sense. However, select this option when connecting the storage system and the host which is not necessary of the NOP-IN sending. However, when connecting the storage system and the host which does not need of the NOP-IN sending, select this option.

For instance:

• When connecting the storage system and the Open Enterprise Server of Novell Co., Ltd.
• When connecting the storage system and winBoot/i of emBoot Co., Ltd..

82

Discovery CHAP Mode

Select this option when the CHAP authentication is performed at the time of the discovery login In the iSCSI connection environment.

For instance: When the CHAP authentication is performed at the time of the discovery login in the iSCSI environment of the VMware host and storage system

83

Report iSCSI Full Portal List Mode

When configuring alternate paths in the environment of connecting the VMware host and storage system: If waiting of replying of the target information from the host option mode 83 enabled port other than ports of discovery login, select this host mode option.

Apply this host mode option when all of the following conditions are met:

• Configuring alternate paths in the environment of connecting the VMware host and storage system.
• Waiting for replying of the target information from the ports other than ports of discovery login.

88

Nondisruptive migration with HP-UX hosts

When converging multiple host-target ports used in the migration source storage system on the migration target storage system, and enable LUN path definition from a host group belonging to a virtual storage machine to an LDEV defined in a different virtual storage machine.

• ON: LUN path definition is enabled.
• OFF: LUN path definition is disabled.

Microcode: DKCMAIN 80-02-01-00/01 and later.

Note:

1. Apply this host mode option when all the following conditions are met:

   - You are using the nondisruptive migration function to migrate volumes in multiple old storage models that use the same server.

   - You need to reduce the number of Target ports used on the migration target storage system.

   - The host is an HP-UX server.

2. Applying this option to a server other than HP-UX can cause the following:

   - Path addition from the server to the migration target storage system might fail.

   - Display of devices that the server recognizes might be invalid.

3. If a LUN path is defined to an LDEV defined in a virtual storage machine different from the one to which the host group belongs, this option cannot be set to OFF.

96

Change the nexus specified in the SCSI Logical Unit Reset

When you want to control the following ranges per host group when receiving LU Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

97

Proprietary ANCHOR command support

When connecting to Hitachi NAS Platform.

Microcode: DKCMAIN 83-02-01-20/00 and later.

100

Hitachi HBA (Fabric Emulation Mode) Connection Option¹

Select this option when connecting the 8-Gbps channel port (in the storage system) and the adapter of BladeSymphony/HA8000 Hitachi Gigabit Fibre Channel by using the Fabric Emulation mode.

102

(GAD) Standard Inquiry Expansion for Hitachi Command Suite

When all of the following conditions are satisfied:

• The OS of the host is Windows (host mode 0C (Deprecated) Windows or 2C Windows Extension) or AIX (host mode 0F AIX), and the MPIO function is used.
• Global-active device (GAD) or nondisruptive migration (NDM) is used.
• Hitachi Device Manager (HDvM) agent is used.

105

Task Set Full response in the event of I/O overload

When all of following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used.
• You want to return Task Set Full response from the storage system to the host when an overload of I/Os occurs on the storage system.

Notes:

1. Configure these host mode options only when requested to do so.
2. Set the UUID when you set host mode option 33 and host mode 05 OpenVMS is used.

Notes:

• If Windows server hosts are registered in a host group, ensure that the host mode of the host group is 0C Windows or 2C Windows Extension.

  If the host mode of a host group is 0C Windows and an LU path is defined between the host group and a logical volume, the logical volume cannot be combined with other logical volumes to form a LUSE volume (that is, an expanded LU).

  If the host mode of a host group is 2C Windows Extension and an LU path is defined between the host group and a logical volume, the logical volume can be combined with other logical volumes to form a LUSE volume (that is, an expanded LU). If you plan to expand LUs by using LUSE in the future, set the host mode 2C Windows Extension.

• If VMware server hosts are registered in a host group, ensure that the host mode of the host group is 01 VMware or 21 VMware Extension.

  If the host mode of a host group is 01 VMware and an LU path is defined between the host group and a logical volume, the logical volume cannot be combined with other logical volumes to form a LUSE volume (that is, an expanded LU).

  If the host mode of a host group is 21 VMware Extension and an LU path is defined between the host group and a logical volume, the logical volume can be combined with other logical volumes to form a LUSE volume (that is, an expanded LU). If you plan to expand LUs by using LUSE in the future, set the host mode 21 VMware Extension.

• If you plan to expand LUs by using LUSE in case of Windows virtual host on VMware recognizing LU by Raw Device Mapping (RDM) method, set the host mode 2C Windows Extension. If the host mode 2C Windows Extension is not set, change the host mode to 2C. Before changing the host mode, back up the LUSE volume. After changing the mode, restore the LUSE volume.

VERITAS Database Edition / Advanced Cluster

Oracle Solaris Cluster (Sun Cluster)

Use when VERITAS Database Edition/Advanced Cluster for Real Application Clusters or VERITAS Cluster Server 4.0 or later (I/O fencing function) is used.

Use when Oracle Solaris Cluster (Sun Cluster) is used.

TPRLO (Third-party process layout)

Use when all the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used
• The Emulex host bus adapter is used
• The mini-port driver is used
• TPRLO=2 is specified for the mini-port driver parameter of the host bus adapter

Automatic recognition function of LUN

Use when all the following conditions are satisfied:

• The host mode 00 Standard or 09 Solaris is used.
• SUN StorEdge SAN Foundation Software Version 4.2 or higher is used
• You want to automate recognition of increase and decrease of devices when genuine SUN HBA is connected.

Enable this HMO when connected to Hitachi NAS Platform version 12.5 or later.

Note: When you use Hitachi Ops Center Administrator(Administrator) to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

No display for ghost LUN

Use when all the following conditions are satisfied:

• The host mode 03 HP is used.
• You want to suppress creation of device files for devices to which paths are not defined.

SIM report at link failure1

Use when you want to be informed by SIM (service information message) that the number of link failures detected between ports exceeds the threshold.

HP TruCluster with TrueCopy function

Use when all the following conditions are satisfied:

• The host mode 07 Tru64 is used.
• You want to use TruCluster to set a cluster to each of P-VOL and S-VOL for TrueCopy or Universal Replicator.

HACMP/PowerHA®

Use when all the following conditions are satisfied:

• The host mode 0F AIX is used.
• HACMP* or PowerHA® is used.

* HACMP 4.5 version 4.5.0.13 or later, HACMP 5.1 version 5.1.0.4 or later, or HACMP 5.2 or later.

Veritas Cluster Server

Oracle Solaris Cluster (Sun Cluster)

Use when Veritas Cluster Server is used.

Use when Oracle Solaris Cluster (Sun Cluster) is used.

Set/Report Device Identifier enable

Use when all the following conditions are satisfied:

• Host mode 03 HP or 05 OpenVMS2 is used. Set the UUID when you set HMO 33 and host mode 05 OpenVMS is used.
• You want to enable commands to assign a nickname of the device.
• You want to set UUID to identify a logical volume from the host.

Change the nexus specified in the SCSI Target Reset

When you want to control the following ranges per host group when receiving Target Reset:

• Range of job resetting.
• Range of UAs (Unit Attentions) defined.

V-VOL expansion

When all of the following conditions are satisfied:

• The host mode 0C Windows or 2C Windows Extension is used
• You want to automate recognition of the DP-VOL capacity after increasing the DP-VOL capacity.

Prioritized device recognition command

When you want to execute commands to recognize the device preferentially.

Prevent “OHUB PCI retry”

When IBM Z10 Linux is used.

Queue Full Response

When the command queue is full in the HUS VM storage system connecting with the HP-UX host, and if you want to respond Queue Full, instead of Busy, from the storage system to the host.

HAM S-VOL Read

When you do not want to generate the failover from MCU to RCU, and when the applications that issue the Read commands more than the threshold to S-VOL of the pair made with High Availability Manager are performed.

BB Credit Set Up Option1³

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the fibre channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 50.

BB Credit Set Up Option2³

When you want to adjust the number of buffer-to-buffer credits (BBCs) to control the transfer data size by the fibre channel, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Use the combination of this host mode option and the host mode option 49.

Round Trip Set Up Option³

If you want to adjust the response time of the host I/O, for example when the distance between MCU and RCU of the TrueCopy pair is long (approximately 100 kilometers) and the Point-to-Point topology is used.

Note: Set host mode option 51 for both ports on MCU and RCU.

HAM and Cluster software for SCSI-2 Reserve

When a cluster software using the SCSI-2 reserve is used in the High Availability Manager environment.

(VAAI) Support Option for the EXTENDED COPY command

When the VAAI (vStorage API for Array Integration) function of VMware ESX/ESXi 4.1 is used.

HAM response change

When you use 0C Windows, 2C Windows Extension , 01 VMware, or 21 VMware Extention as the host mode in the High Availability Manager environment.

LUN0 Change Guard

When HP-UX 11.31 is used, and when you want to prevent adding or deleting of LUN0.

Expanded Persistent Reserve Key

Increases Reservation Keys from 128 to 2,048.

(VAAI) Support Option for vStorage APIs based on T10 standards

When you connect the storage system to VMware ESXi 5.0 and use the VAAI function for T10.

Change of the ED_TOV value

When the OPEN fibre channel port configuration applies to following:

• The topology is the Fibre Channel direct connection.
• The port type is Target or RCU Target.

Support Page Reclamation for Linux

When using the Page Reclamation function from the environment which is being connected to the Linux host.

When connected to Hitachi NAS Platform to allow the NAS host to retrieve thin provisioning information and support the SCSI UNMAP command.

Note: When you use Hitachi Ops Center Administrator(Administrator) to allocate storage to the NAS modules on ports 1A and 2A, this HMO is enabled automatically.

Online LUSE expansion

When you want the host to be notified of expansion of LUSE volume capacity.

Change the Unit Attention for Blocked Pool-VOLs

When you want to change the unit attention (UA) from NOT READY to MEDIUM ERROR during the pool-VOLs blockade.

AIX GPFS Support

When using General Parallel File System (GPFS) in the HUS VM storage system connecting to the AIX host.

Support Option for WS2012

When using the following functions provided by Windows Server 2012 (WS2012) from an environment which is being connected to the WS2012:

• Thin Provisioning function
• Offload Data Transfer (ODX) function

Notes:

1. Configure these host mode options only when requested to do so.
2. Set the UUID when you set host mode option 33 and host mode 05 OpenVMS is used.
3. Host mode options 49, 50, and 51 are enabled only for the HF8G package.