Troubleshooting

Last updated
Save as PDF

See the following tables for troubleshooting information for Universal Volume Manager.

General troubleshooting

Check the following table for the problem. After resolving an error, retry the operation. If you cannot resolve the issue, contact customer support.

Symptom	Possible causes and troubleshooting steps
Hitachi Device Manager - Storage Navigator cannot access an external volume.	An error occurred in the switch, or the switch is off. A cable between the local and external system is not connected properly. The external volume was deleted in the external system. An error occurred in the external volume. The path is changed in the external system. The port attribute in the local storage system is changed. Topology information is not properly set.
An external volume cannot be mapped.	The number of mapped volumes exceeds the maximum number available for the local storage system: - VSP G350, VSP F350, : 16,383 - VSP G370, VSP F370: 32,767 - VSP G700, VSP F700: 49,151 - VSP G900, VSP F900: 65,279 There are not enough LDKC:CU:LDEV numbers available for external volume mapping.
An external path is blocked.	See the preceding problem, "Device Manager - Storage Navigator cannot access the external volume". If the problem persists after correcting any errors, continue to step 2. Confirm that the cables between the local and external systems are connected properly. If the cables are properly connected, disconnect and then reconnect them. After 30 seconds, check the path status.
Action is required for a path status in the View External LUN Properties dialog box.	See Troubleshooting external path status .
The volume in the external system cannot be found even after port discovery or volume discovery was performed.	Follow any instructions given in the error message or messages and then retry the operation. If the problem persists, see Troubleshooting port and volume discovery problems .
The external volume is blocked.	All external paths are blocked (paths are not connected). The external volume is not set to Read/ Write. The external volume is blocked by an error.
The status of the external volume is Blockade.	When errors occur in all external paths, the local storage system changes the status of the external volume to Blockade. Reconnect the volume or storage system. If the volume's status still does not change to Normal, restore the path as described in the preceding problem, "The external path is blocked", and then reconnect the volume again.
The ? sign displays in the LUN ID (Highest Priority) column of the Discovered External Volumes table in the Add External Volumes window.	A corresponding external volume was not found for the external path with the highest priority. Look for problems with the connection to the external system that failed during volume discovery. Fix any problems, and perform the operation again.
External volume discovery was not completed because of failure.	Look for problems with the connection to the external system; also verify that the external volume is correctly configured in the external system. Fix any problems, and then perform the operation again.
After reconnecting an external volume or system, 10 minutes have passed but the status has not change from Checking.	Click Refresh on the Device Manager - Storage Navigator main window. If the status remains Checking, perform the reconnect operation again.
After disconnecting an external volume or system, the status does not change.	Click Refresh on the Device Manager - Storage Navigator main window. Note that the time required for write processing from cache to the external volume depends on volume capacity. More time is required for larger volumes. Processing speed is about 20 MB/s. However, the processing speed also depends on the performance and status of the external storage system.

Troubleshooting external path status

After you select External Storage from the Storage Systems tree in Storage Navigator, 'Warning' is displayed in the Status field of the External Storage window when there is an abnormal mapping path in the external volume group of the corresponding external storage. You can check details about the abnormal mapping path in the View External LUN Properties window.

The following table shows path statuses in the View External LUN Properties window. Descriptions and corrective actions you can take are provided.

Also, see Troubleshooting path errors for specific storage systems. If you cannot resolve the issue, contact customer support.

Status	Description	Corrective action
Unknown	The path status cannot be determined.	Contact customer support.
Blockade	The external port is blocked.	The port is blocked because of firmware replacement, package replacement, or other factor. Check the status of the local storage system.
External device setting changed	An external system setting has changed. For example, the path definition was deleted, or the external system itself was replaced by another device.	The port of the external system is recognized. See your device manufacturer's documentation to verify that the settings on the volumes in question have not changed.
LDEV size reduced	The external volume capacity was reduced.	Check the external volume capacity. If the LDEV is smaller than expected, delete the external volume, and then remap to it.
Not ready	The reply of the external system was NOTREADY. Either the drive is spinning up or the system is being formatted.	The path cannot be used to access the external system. Check the status of the external system.
Illegal request	The reply of the external system was ILLEGALREQUEST. The command cannot be run on the external system. Data protection might be set on the external system.	The external system port is recognized. Check the external system settings and correct any problems.
Command aborted	The reply of the external system was ABORTEDCOMMAND. An error might have occurred on the external system side.	The external system port is recognized. Check external system settings and the physical connection to the external system (cables and switches) and correct any problems.
Busy	The external system is in the BUSY status.	The external system port is recognized. Check whether the external system configuration causes excessive load on the system. If the load is excessive, lower the load.
Response error	The external system is in blocked status caused by an abnormal reply (Response). You might not be able to access the system, or data protection might be set.	The external system port is recognized. Check the settings and status of the external system and fix any problems.
Initiator port	The port attribute of the external system has been changed to "initiator".	Set the port attribute of the external system to "target".
Destage Failed	The writing of data from cache memory to the external volume failed.	Reconnect the external volume or system. When status is Normal, disconnect the volume or system. You might need to try this multiple times.
Unknown port	The port attribute of the external system is unknown.	The external system port is recognized. Check external system settings and the physical connection to the external system (cables and switches), and fix any problems. When alternate paths are configured for the external system, the following conditions might cause the unknown port status. If that is the case, verify the path configuration and add the required paths, if any. The number of paths for external volume group is less than the ones for the external path group. The path configurations between the external path group and the external volume group are inconsistent.
Cannot detect port	The external path has been removed or the external system port cannot be found. Possible causes are: The cable is not properly connected. The topology does not match between the external and target ports. Because security is set on the port, the external system cannot be recognized from the local system. If the external system is connected through switches, the switch setting might be incorrect.	If you cannot restore the path after checking the possible causes, contact customer support.
Internal error	A program error occurred, or there is a logical contradiction.	Contact customer support.
Timeout	Processing was retried after an abnormal reply. However, processing stopped because of a timeout.	The external system port is recognized. Check external system settings and the physical connection to the external system (cables and switches).
Device check error	An external volume is mapped, but you cannot access the volume in the external system.	Check the status of the volume in the external system and take any necessary corrective action. Format the volume if it is not formatted.
Medium error	The external volume has become inaccessible.	Check the status of the volume in the external system and take any necessary corrective action. Format the volume if it is not formatted.

Troubleshooting path errors for specific storage systems

The following types of error messages include storage-system-specific recovery information, external device setting changed, illegal request, cannot detect port. If you cannot resolve the issue, contact customer support.

Virtual Storage Platform G200, G400, G600, G800, Virtual Storage Platform F400, F600, F800, Virtual Storage Platform G350, G370, G700, G900, Virtual Storage Platform F350, F370, F700, F900

Path Status	Description and corrective actions
External device setting changed	LU path settings might have been changed by using LUN Manager. If this happens, either: - Use LUN Manager to change the settings back to the values used when the volume was mapped - Use Universal Volume Manager software to delete the LU, and then add it again. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as ShadowImage, TrueCopy, Universal Replicator, or global-active device. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. Make sure the cables are connected correctly, and then use LUN Manager to set the ports properly. LUN security might have been enabled by using LUN Manager. If so, check whether the LUN security setting is correct.

Hitachi Virtual Storage Platform G1x00 and Hitachi Virtual Storage Platform F1500

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy, Universal Replicator, ShadowImage, Thin Image, or global-active device. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. LUN security might have been enabled by using LUN Manager. If so, check whether the LUN security setting is correct.

Unified Storage VM, Virtual Storage Platform, and Universal Storage Platform V/VM

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy, Universal Replicator, or ShadowImage. The volume's access attribute might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. LUN security might have been enabled by LUN Manager. If so, check whether the LUN security setting is correct.

Universal Storage Platform or TagmaStore NSC

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy or ShadowImage. The volume's access attribute might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. LUN security might have been enabled by LUN Manager. If so, check whether the LUN security setting is correct.

Lightning 9900 V

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy, Universal Replicator, or ShadowImage. The volume's access attribute might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. LUN security might have been enabled by LUN Manager. If so, check whether the LUN security setting is correct.

Lightning 9900

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy, Universal Replicator, or ShadowImage. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. LUN security might have been enabled by LUN Manager. If so, check whether the LUN security setting is correct.

Thunder 9500V

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy or ShadowImage. The volume's access attribute might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. The host group LUN security might have been enabled by LUN Management. If so, check whether the LUN security setting is correct.

HUS/AMS/WMS

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as TrueCopy or ShadowImage. The volume's access attribute might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. The host group LUN security might have been enabled by LUN Manager. If so, check whether the LUN security setting is correct.

SVS200

Path Status	Description and corrective actions
External device setting changed	LU path settings can be changed by using LUN Manager. Either change the settings back to the values used when the volume was mapped, or use Universal Volume Manager software to delete LU and then add LU. The access attribute of the volume might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Illegal request or Response error	If the volume is a pair volume, it might be protected because of the pair status. If this is the case, change the pair status or delete the pair. Make sure the volume is not set to a pair such as Business Copy XP, Continuous Access XP, Continuous Access XP Journal. The volume's access attribute might have been changed by Data Retention Utility. If the volume is protected by the access attribute, release the protection.
Cannot detect port	There is a problem with connection to the external storage system. The possible causes are: - Cable connection. Make sure the cable is connected correctly. - Port settings. The topology settings of the external port and the target port might not match. Use LUN Manager to make sure that the ports are set properly. - Switch settings. If the external storage system is connected through switches, make sure that the switch settings are correct. LUN security might have been enabled by LUN Management. If so, check whether the LUN security setting is correct.

Troubleshooting port and volume discovery problems

The following table shows corrective actions you can take for port and volume discovery problems. If you cannot resolve the issue, contact customer support.

Problem	Corrective action
The port on the local storage system and port on the external system are not connected.	Connect the External port of the local system and the external system port.
The cable for the switch is not connected correctly, or the switch's port is blocked.	Connect the cable to the correct port on the switch. Or change the port status to the normal status.
Zoning for the switch is not set appropriately.	Make sure the zoning configuration allows the External port of the local system to communicate with the external system port.
External volume returned RESERVATION CONFLICT.	Release the reserved state of the external volume.
Port security is set on the external system.	Cancel the port security setting or change the security of the external system so that the local system can access the port of the external system.
No LU is configured on the external system port.	Configure an LU on the port.
External volume capacity is less than the supported capacity for Universal Volume Manager.	Perform one of the following: Increase the external volume's capacity to be equal or larger than the supported capacity. Use a security function or delete the LU setting from the external system port so that the local system cannot recognize a volume with insufficient capacity.
The external volume is configured as a management LU.	If a management LU, such as Universal Xport LU, is configured on the external system port, perform one of the following: Make sure that at least one LU is used for data storage and has a smaller LUN than the management LU's LUN. Also make sure that the data storage LU is set to the port connected to the local system. Delete the management LU from the port connected to the local system. Use a security function and configure the access attribute of the management LU to prohibit read and write operations.
Remote command devices of the external system are cascaded.	Perform one of the following: Change the configuration so that the remote command devices are not cascaded. Use a security function or delete the LU setting from the port of the connected external system so that the local system cannot recognize the remote command devices.
External system information retrieved by port discovery is not found in the profile information.	Perform one of the following: Connect an external system supported by Universal Volume Manager. Contact customer support to ask if the external system is supported by Universal Volume Manager. If the system is supported, install the firmware version that supports the external system or install the profile information of the external system.
Login to the external system failed.	Perform one of the following: Make sure that the port status of the external system is Normal. Register the WWN to the external system to allow login from the local system.
The external volume is not in Normal status, or a failure or error occurred in retrieving information from the external system.	Make sure that the status of the external system or the external volume is Normal.

If none of the actions suggested in the table provide volume discovery, remove the cable connection between the local and external storage systems, and then reconnect the storage systems. After 30 seconds, retry the operation.

Contacting customer support

If you need to contact customer support, provide as much information about the problem as possible, including:

The circumstances surrounding the error or failure
The content of any error messages displayed on the host systems
The content of any error messages displayed on Device Manager - Storage Navigator
The Device Manager - Storage Navigator configuration information. Use the Dump Tool to get this information.
The service information messages (SIMs), including reference codes and severity levels, displayed by Device Manager - Storage Navigator

The Hitachi Vantara customer support staff is available 24 hours a day, seven days a week. If you need technical support, log on to the Hitachi Vantara Support Portal for contact information: https://support.hitachivantara.com/en_us/contact-us.html

Quick Links