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Hitachi Vantara Knowledge

Creating and managing DP-VOLs

For information about mapping external volumes that are larger than 4 TB, see Using external volumes larger than 4 TB.

About DP-VOLs

Dynamic Provisioning requires the use of DP-VOLs, which are virtual volumes with no physical memory space. In Dynamic Provisioning, multiple DP-VOLs can be created.

A DP-VOL is a volume in a thin provisioning storage system. It is the virtual volume from a DP pool. Data in the DP pool is used via a DP-VOL. A DP-VOL is a virtual LU to some hosts.

Relationship between a pool and DP-VOLs

Before you can use Dynamic Provisioning, a DP-VOL and a pool are required. Dynamic Provisioning uses the pool volumes in a pool through the DP-VOLs.

This figure shows the relationship between a pool and DP-VOLs.

GUID-378E4706-70AF-418C-B7F0-0CD6173F470A-low.gif

DP-VOL requirements

Items

Requirements

Volume type

DP-VOL (V-VOL)

The LDEV number is handled in the same way as for normal volumes.

Maximum number of DP-VOLs

For VSP E990:

  • Up to 63,232 per pool (For a pool with data direct mapping enabled, up to 63,232 per pool).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)
  • Up to 63,232 per system (the total number of DP-VOLs and external volumes must be 63,332 or less).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)

For VSP G130:

  • Up to 2,047 per pool (For a pool with data direct mapping enabled, up to 2,047 per pool.)
  • Up to 2,047 per system (The total number of DP-VOLs and external volumes must be 2,047 or less.)

For VSP G350 and VSP F350:

  • Up to 16,383 per pool (For a pool with data direct mapping enabled, up to 16,383 per pool).
    • Up to 16,375 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 16,383 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)
  • Up to 16,383 per system (the total number of DP-VOLs and external volumes must be 16,383 or less).
    • Up to 16,375 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 16,383 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)

For VSP G370 and VSP F370:

  • Up to 32,767 per pool (For a pool with data direct mapping enabled, up to 32,767 per pool).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)
  • Up to 32,767 per system (the total number of DP-VOLs and external volumes must be 32,767 or less).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)

For VSP G700 and VSP F700:

  • Up to 49,151 per pool (For a pool with data direct mapping enabled, up to 49,151 per pool).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)
  • Up to 49,151 per system (the total number of DP-VOLs and external volumes must be 49,151 or less).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)

For VSP G900 and VSP F900:

  • Up to 63,232 per pool (For a pool with data direct mapping enabled, up to 63,232 per pool).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)
  • Up to 63,232 per system (the total number of DP-VOLs and external volumes must be 63, 232 or less).
    • Up to 32,623 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Deduplication and Compression)
    • Up to 32,639 DP-VOLs per pool (For DP-VOLs whose Capacity Saving is Compression)

Volume capacity

46.87 MB to 256 TB for each volume (8 GB to 256 TB for V-VOLs with the data direct mapping attribute)

  • When TB is specified: 0.01 TB to 256 TB including V-VOLs with the data direct mapping attribute.
  • When GB is specified: 0.04 GB to 262,144 (8 GB to 262,144 GB for V-VOLs with the data direct mapping attribute)
  • When MB is specified: 46.87 to 268,435,456 MB (8,192 MB to 268,435,456 MB for V-VOLs with the data direct mapping attribute)
  • When block is specified: 96,000 blocks to 549,755,813,888 blocks (16,777,216 blocs to 549,755,813,888 blocks for V-VOLs with the data direct mapping attribute)

Total maximum volume capacity is as follows:

  • For VSP E990: 16.6 PB (the shared memory must be installed)
  • VSP G130: 240 TB
  • For VSP G350 and VSP F350: 4.4 PB (the shared memory must be installed)
  • For VSP G370 and VSP F370: 8.0 PB (the shared memory must be installed)
  • For VSP G700 and VSP F700: 12.5 PB (the shared memory must be installed)
  • For VSP G900 and VSP F900: 16.6 PB (the shared memory must be installed)

However, if DP-VOLs of the capacity saving function are enabled and are associated with a pool, then the maximum volume capacity is the value which is deducted from the total capacity (10% of the total capacity of DP-VOLs before the capacity saving).

Path definition

Available.

LDEV format

Available. Quick Format is not available.

System option mode (SOM) 867 ON: When you format an LDEV on a DP-VOL, the capacity mapped to the DP-VOL is released to the pool as free space.

When you format a DP-VOL, the storage system releases the allocated page area in the DP-VOL. The quick format operation cannot be performed. If the LDEV format is applied to V-VOLs that are enabled for full allocation, the used capacity of the pool is not changed before the LDEV format is applied.

Caution:

  • For a DP-VOL with deduplication and compression enabled, a deduplication system data volume whose capacity saving status is Failed cannot be formatted.

The following table indicates the maximum capacity of the total DP-VOLs whose Capacity Saving setting is Deduplication and Compression or Compression.

Storage system Added shared memories Maximum capacity of the total DP-VOL whose Capacity Saving setting is Deduplication and Compression or Compression (PB)
Virtual Storage Platform E990Base 3.3
Extension 1 6.0375
Extension 2 9.375
Extension 3 12.45
Virtual Storage Platform G350 or Virtual Storage Platform F350 Base 0.2175
Extension 1 1.2
Extension 2 3.3
Extension 3 Not available
Virtual Storage Platform G370 or Virtual Storage Platform F370 Base 1.2
Extension 1 3.3
Extension 2 6.0375
Extension 3 Not available
Virtual Storage Platform G700 or Virtual Storage Platform F700 Base 1.2
Extension 1 3.3
Extension 2 6.0375
Extension 3 9.375
Virtual Storage Platform G900 or Virtual Storage Platform F900 Base 3.3
Extension 1 6.375
Extension 2 9.375
Extension 3 12.45

Creating DP-VOLs

Note
  • The page reservation function cannot be used for the following pools. Therefore, it is necessary to monitor the free space of the pools to prevent the non-writable state due to the full pool status.
    • Pools that contain pool volumes belonging to a parity group with accelerated compression enabled.
    • Pools with capacity saving enabled.
  • The T10 PI attribute can be set only when creating LDEVs. The attribute cannot be released from the LDEVs for which the T10 PI attribute is set.

Before you begin

  • The Storage Administrator (Provisioning) role is required to perform this task.
  • If you are creating DP-VOLs for active flash, pool volumes whose drive type is SSD or FMD must be installed in advance.
  • If you want to create DP-VOLs for which the capacity saving setting is Deduplication and Compression, the pool must meet these conditions:
    • LDEV status is normal for Deduplication System Data Volume (fingerprint) if the volumes already exist.
    • LDEV status is normal for Deduplication System Data Volumes (Data Store) if the volumes already exist.
    • If there are Deduplication System Data Volumes (Data Store) in the pool, these volumes are not being deleted.

Procedure

  1. Click Storage Systems, and expand the Storage Systems tree.

  2. Click Logical Devices.

  3. Click Create LDEVs.

  4. From Provisioning Type in the Create LDEVs window, confirm Dynamic Provisioning is selected.

    If not, select Dynamic Provisioning.
  5. To use the capacity saving function, in Capacity Saving, select Compression or Deduplication and Compression. If you select Deduplication and Compression, you will not be able to change the setting to Compression later.

    If the LDEV status of the deduplication system data volume in the selected pool is other than Normal, Deduplication and Compression cannot be selected.

    Capacity Saving is set to Disabled in these cases:

    • Data Direct Mapping is set to Enable.
    • The dedupe and compression license is not installed.
    • Multi-Tier Pool is set to Enable.
    CautionIf a pool has LDEVs in a parity group with accelerated compression enabled, select Deduplication and Compression if you want to enable capacity saving. Selecting Compression might result in lower I/O performance than using accelerated compression only.
  6. If you want to create a V-VOL for Dynamic Tiering, select Enable from the Multi-Tier Pool field. If not, select Disable.

    If no pool is set to Enable in Dynamic Tiering, Disable is fixed.
  7. If the pool is to be used by active flash, select Active Flash.

    If there are no pool volumes available using the required drive types, this check box cannot be selected.
  8. Select the pool as follows:

    NoteThe page reservation function cannot be set for the pool that contains LDEVs belonging to a parity group with accelerated compression enabled.
    1. Select a drive.

      • For VSP E series, select from Drive Type in Pool Selection.
      • For VSP G130, G/F350, G/F370, G/F700, G/F900, select from Drive Type/RPM in Pool Selection.
    2. From RAID level, select the RAID level.

    3. Click Select Pool.

    4. In the Select Pool window in the Available Pools table, select a pool.

      Note

      You can specify a pool when creating DP-VOLs if the pool status is one of these:

      • Normal
      • Exceeded Threshold
      • In progress of pool capacity shrinking

      You can select only one pool. When Enable was selected previously, the Dynamic Tiering pools are displayed, and when Disable is selected, only the non-Dynamic Tiering pools are displayed.

      Perform these steps if necessary:

      • Click Filter to open the menu, specify the filtering, and then Apply.
      • Click Options to specify the units of pools or the number of rows to be displayed.
    5. Click OK.

      The Select Pool window is no longer displayed. The selected pool name is displayed in Selected Pool Name (ID), and the total capacity of the selected pool is displayed in Selected Pool Capacity.
  9. If you want to offset the specified LDEV capacity by boundary, change the default Capacity Compatibility Mode (Offset boundary) from OFF to ON.

  10. In LDEV Capacity, enter the DP-VOL capacity to be created.

    You can enter the capacity within the range of figures displayed below the text box. You can enter the number with 2 digits after the decimal point. You can change the capacity unit from the list.
  11. In Number of LDEVs, enter the number of LDEVs to be created.

    You can enter the number of LDEVs within a range of the figures displayed.
  12. In LDEV Name, enter these characters:

    • In Prefix, enter the alphanumeric characters, which are fixed characters of the head of the DP-VOL name. The characters are case-sensitive.
    • In Initial Number, enter the initial number following the prefix name, which can be up to 9 digits.

    You can enter a total of 32 characters including the initial number.

  13. Click Options.

  14. In Initial LDEV ID, make sure that LDEV ID is set.

    To confirm the used number and unavailable number, click View LDEV IDs to display the View LDEV IDs window.

    In the table, used LDEV numbers are displayed in blue, unavailable numbers are displayed in gray, and unused numbers are displayed in white. LDEV numbers that are unavailable may already be in use or already assigned to another emulation group (group by 32 LDEV numbers).

  15. From Cache Partition, select CLPR.

  16. From MP Unit, select an MP unit.

    Select an MP unit to be used by the LDEVs. If you assign a specific MP unit, select the ID of the MP unit. If you can assign any MP unit, click Auto.
  17. From Full Allocation, select Enable or Disable. To reserve pages in the pool that are the same size as the LDEV capacity, select Enable.

    If Compression or Deduplication and Compression is set for Capacity Saving, Disable is set for Full Allocation.
  18. From Tiering Policy, select the tiering policy to be used by the LDEVs.

    If you assign a specific tiering policy, select any policy. All(0) is selected by default. You can change a level from Level1(1) to Level5(5) or from Level6(6) to Level31(31). You can specify the function when the Multi-Tier Pool is enabled.

    From Level6(6) to Level31(31), the names of tiering policies can be changed. If these names have changed, the new names are displayed.

    For a DP-VOL with capacity saving enabled, you can select All(0) or Level1(1) through Level5(5).

  19. From New Page Assignment Tier, select a new page assignment tier that is used for LDEVs.

    You can specify the function when the Multi-Tier Pool is enabled.
  20. In Relocation Priority, select a priority.

    To relocate the LDEV preferentially, set Prioritize. You can select Default or Prioritize. You can specify this function when the Multi-Tier Pool is enabled.
  21. In T10 PI, select Enable or Disable.

    CautionThe T10 PI attribute can only be defined during the initial creation of LDEVs. The defined attribute cannot be removed from LDEVs on which it is already set.
  22. If necessary, change the settings of the V-VOLs.

    Click Change LDEV Settings to open the Change LDEV Settings window.
  23. If necessary, delete a row from the Selected LDEVs table.

    Select a row to be deleted, then click Remove.
  24. Click Add.

    The created V-VOLs are added to the right Selected LDEVs table. If invalid values are set, an error message is displayed.

    The Pool Type, Pool Volume Selection, and Pool Name must be set. If these required items are not entered or selected, you cannot click Add.

  25. If you want to add LUN paths, click Next. If not, click Finish.

  26. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  27. Click Apply to submit the task.

Requirements for increasing DP-VOL capacity

You can increase the capacity of a DP-VOL up to 256 TB.

To notify the host that the DP-VOL capacity has been increased, make sure host mode option 40 is enabled. Processing differs as follows, depending on the value of host mode option 40:

  • When host mode option 40 is not enabled, the host will not be notified that the DP-VOL capacity has been increased. Therefore, the DP-VOL data has to be read again by the host after the capacity is increased.
  • When host mode option 40 is enabled, the host is notified that the DP-VOL capacity has increased. If the operating system cannot recognize the value of capacity that was increased, the DP-VOL data has to be read again by your storage system.

These requirements are important when increasing the DP-VOL capacity:

  • The DP-VOL to be increased is not shared with a software product that does not allow increasing the volume capacity (see Increasing DP-VOL capacity).
  • The DP-VOL is not undergoing LDEV formatting.
  • The DP-VOL does not have data direct mapping enabled.
  • The DP-VOL is not a deduplication system data volume (fingerprint).
  • When increasing the capacity of a deduplication system data volume (data store), the auto expansion must not be in process.
  • If you increase the capacity for the deduplication system data volumes (data store), the volumes will not be included in the processing of the automatic capacity expansion.
  • The capacity to be added to the DP-VOL must be specified within the range indicated below LDEV Capacity in the Expand V-VOLs window.
  • The pool related to the DP-VOLs to be increased is in any one of these statuses:
    • Normal
    • In progress of pool capacity shrinking
CautionWhen increasing DP-VOL capacity, do not perform the following operations. When you perform these operations, do not increase DP-VOL capacity.
  • Operations using Virtual LUN
  • Creating DP-VOLs
  • Restoring pools
  • Deleting DP-VOLs
  • Operations to increase the DP-VOL capacity in another instance of CCI
  • Maintenance of your storage system
NoteAfter increasing DP-VOL capacity, refresh the display and confirm that the DP-VOL is increased. If the DP-VOL capacity is not increased, wait a while, refresh the display again, and confirm that the DP-VOL is increased. If you perform an operation without making sure that the DP-VOL is increased, operations from Device Manager - Storage Navigator might fail.

If one of these operations is being performed, the DP-VOL capacity might not be increased:

  • Volume Migration
  • Configuration change of journal used by Universal Replicator
  • Quick Restore by ShadowImage

Increasing DP-VOL capacity

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. Select the pool associated with the DP-VOL that has the capacity that you want to increase.

  4. Select the Virtual Volumes tab.

  5. From the table, select the DP-VOL with the capacity you want to increase.

  6. Click Expand V-VOLs.

  7. In the Expand V-VOLs window, if the DP-VOL is selected from the LDEV table in the Logical Devices window, click More Actions Expand V-VOLs.

  8. Select Specify total capacity or Specify additional capacity.

  9. If you want to offset the specified LDEV capacity by boundary, change the default Capacity Compatibility Mode (Offset boundary) from OFF to ON.

  10. In Capacity, enter the expanded capacity amount.

    Enter the LDEV capacity to two decimal places within the range of values indicated.
  11. Click Finish.

  12. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  13. Click Apply to submit the task.

About releasing pages in a DP-VOL

Releasing pages in a DP-VOL frees up pool capacity. When a page in the DP-VOLcontains zero data, the free capacity of a pool increases after the pages are released. You can reclaim zero pages on each V-VOL and then monitor the progress on the View Pool Management Status window. If you stop the reclaim zero pages operation, the zero pages that have already been reclaimed cannot be restored.

Logically, there is no difference between a page with zero data and the area of a DP-VOL without a page allotted. Both are effectively identical. However, a page with zero data uses pool capacity, whereas a DP-VOL without a page allotted does not use pool capacity.

Zero pages can be reclaimed when all these conditions are satisfied:

  • The DP-VOL is not used in conjunction with another storage system software product that does not support reclaiming zero pages.

    See Usage of Dynamic Provisioning and Dynamic Tiering with other software products.

  • LDEV formatting is not being performed on the DP-VOL.
  • The DP-VOL is not blocked.
  • The DP-VOL does not have the data direct mapping attribute enabled.
  • The DP-VOL is not a deduplication system data volume.
  • The DP-VOL is associated with a pool.
  • The pool associated with the DP-VOL is not blocked, or is full and blocked.
  • The LUN path is not defined between DP-VOL and the host group enabled with host mode option 97.

Pages that include control cylinders are not processed when releasing pages in a DP-VOL.

Pages that include file system metadata cannot be reclaimed. See Operating system and file system capacity for a table of the pool capacity consumed by the file system.

While releasing pages from a DP-VOL, performance of the host I/O to the DP-VOL might temporarily decrease due to scanning for non-zero data.

If you stop an operation to reclaim zero pages in mid-stream, the pages that have been released will remain as free pool capacity.

After an operation to reclaim zero pages, Dynamic Provisioning automatically balances usage levels among parity groups in the pool. This rebalancing is performed on parity groups related to the pool. If you do not want automatic balancing of the usage levels of parity groups, call customer support to change your configuration.

NoteIf an operation to reclaim zero pages is performed on pools comprised of pool volumes assigned by parity groups with accelerated compression enabled, the used capacity of the pools might not be reduced in comparison with the reduced DP-VOLs capacity.

Dynamic Provisioning does not automatically balance the usage levels among parity groups if the cache memory is not redundant or if the pool usage reaches the threshold.

If all the tracks that belong to a page assigned to a DP-VOL have no records written, you can reclaim the page and return it to the pool's available capacity.

Caution

In these cases, an operation of the reclaim zero pages stops and DP-VOL pages might not be released:

  • The pool-VOL accessed by the target DP-VOL is blocked.
  • The pool associated with the target DP-VOL is blocked while the operation to reclaim zero pages is in progress.
  • Cache memory failure occurs while the operation to reclaim zero pages is in progress.
  • While the operation to reclaim zero pages is in progress, the initial copy operation of the TrueCopy pair, the Universal Replicator pair, the global-active device pair, or the ShadowImage pair is performed on the DP-VOL.
  • The LUN path is defined between DP-VOL and the host group enabled with host mode option 97 while the operation to reclaim zero pages is in progress.

Releasing pages in a DP-VOL

You can reclaim pages in a DP-VOL to free pool capacity. If a page assigned to a DP-VOL contains only zero binary data, you can reclaim the page by releasing zero pages. Reclaiming the page decreases the used capacity of the pool. If the operation to release zero pages is performed on V-VOLs enabled for full allocation, the used capacity of the pool is not changed before the operation to release zero pages is performed.

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. From the table, select the LDEV ID of the volume with the pages you want to release.

  4. Click More Actions Reclaim Zero Pages.

    You cannot release pages in a DP-VOL when the DP-VOL is not in a normal status or the DP-VOL is in the process of reclaiming zero pages.
  5. In the Reclaim Zero Pages window, click Finish.

  6. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  7. Click Apply to submit the task.

  8. After the operation to reclaim zero pages is complete, refresh the display to update the Page Status. If the Page Status is not immediately updated, wait a while, then refresh the display again.

    NoteCompleted is displayed as the Page Status even when no pages can be reclaimed.

    If you have started the reclaiming zero pages operation, and the storage system is powered off, the reclaiming zero pages operation will not automatically continue after the storage system restarts.

    In any of these cases, the reclaiming zero pages will stop, and DP-VOL pages will not be released:

    • LDEV formatting was performed while reclaiming zero pages.
    • The pool-VOL that is being accessed by the target DP-VOL was blocked.
    • The pool associated with the target DP-VOL was blocked while reclaiming zero pages.
    • Cache memory failure occurred while reclaiming zero pages.
    • The DP-VOL was deleted when zero pages were reclaimed.
    • The initial copy operation between the TrueCopy pair or the Universal Replicator pair was performed on the DP-VOL in which zero pages were being reclaimed.

Stopping the release of pages in a DP-VOL

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. Select the pool associated with the DP-VOL with pages you want to stop from being released.

  4. Select the Virtual Volumes tab.

  5. From the table, select the DP-VOL with pages you want to stop from being released.

  6. Click More Actions Stop Reclaiming Zero Pages.

    The Stop Reclaiming Zero Pages window is displayed.

    You cannot stop releasing the pages in a DP-VOL in which zero pages are not being reclaimed.

  7. Click Finish.

  8. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  9. Click Apply to submit the task.

Editing DP-VOLs

Changing the name of a DP-VOL

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. In the Pools window, click the pool name associated with the DP-VOL you want to rename.

  4. Select the Virtual Volumes tab, and then click More Actions Edit LDEVs.

  5. Check LDEV Name and change the LDEV name, if necessary.

    1. In Prefix, enter the characters that will become the fixed characters for the beginning of the LDEV name. The characters are case-sensitive.

    2. In Initial Number, enter the initial number that will follow the prefix name.

  6. Click Finish.

  7. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  8. Click Apply to submit the task.

Changing full allocation settings in DP-VOLs

NoteThis operation cannot be performed on the following types of DP-VOLs:
  • Deduplication system data volumes
  • DP-VOLs with a capacity saving function enabled

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. On the Pools tab, click the pool name associated with the volume that has settings that you want to change.

  4. Select the Virtual Volumes tab, and then click More Actions Edit LDEVs.

  5. In the Edit LDEVs window, check Full Allocation and select one of these options.

    OptionDescription
    EnableAll pages of a DP-VOL are allocated to the current pool.
    DisableAll pages of a DP-VOL might not be allocated to the current pool.
    Tip If the pool of DP-VOLs contains an LDEV enabled with accelerated compression in the parity group, Enable is inactive.
  6. Click Finish.

  7. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  8. Click Apply to submit the task.

Enabling or disabling tier relocation of a DP-VOL

You can enable or disable tier relocation of individual DP-VOLs or on all DP-VOLs.

CautionThis operation cannot be performed on the following types of DP-VOLs:
  • Deduplication system data volumes
  • DP-VOLs with a capacity saving function enabled

DP-VOLs on which tier relocation is disabled are excluded from the targets for the tier range calculation, and are not reflected in the performance information of pools. If tier relocation is disabled on all DP-VOLs in a pool, performance information of a pool is unavailable in the Tier Properties window.

Before you begin

The Storage Administrator (Provisioning) role is required to perform this task.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. On the Pools tab, click the pool name associated with the DP-VOL you want to rename.

  4. Select the Virtual Volumes tab, select an LDEV ID, and then click More Actions Edit LDEVs.

  5. In the Edit LDEVs window, check Tier Relocation and select one of these options.

    OptionDescription
    EnableEnable this attribute if you want to allows tier relocation to be performed to the DP-VOL.
    DisableEnable this attribute if you want to disallow tier relocation to be performed on the DP-VOL in the case of both automatic and manual tier relocation.
  6. Click Finish.

  7. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  8. Click Apply to submit the task.

About deleting a DP-VOL

  • You cannot delete a deduplication system data volume (DSD volume). The deduplication DSD for a pool is deleted automatically in either of these cases:
    • If you delete all DP-VOLs for which capacity saving is Deduplication and Compression in the pool, or if you delete the pool.
    • If you change the capacity saving from Deduplication and Compression to Disable for all DP-VOLs in the pool by using the Edit LDEVs window.
  • You cannot delete a DP-VOL if the status is online.
  • If you are deleting a DP-VOL with deduplication and compression enabled, you must first disable deduplication and compression on the DP-VOL before beginning this procedure.
  • After you delete a DP-VOL for which capacity saving is enabled, if you perform other operations during or just after the DP-VOL deletion processing, those operations might fail. If this occurs, wait for a while, and then retry those operations.
  • The LDEV deletion process is suspended when the size of the used capacity of a pool reaches the depletion threshold. If this occurs, you must resolve the causes of the SIM message. When enough pool capacity is ensured, the deletion process will start again.

Deleting a DP-VOL

Before you begin

  • The Storage Administrator (Provisioning) role is required to perform this task.
  • If the SVP or a Device Manager - Storage Navigator secondary window is in Modify mode while the rehydration processing of the capacity-saving-enabled DP-VOLs is in progress, a conflict occurs and the rehydration processing does not complete (Capacity Saving Status remains Rehydrating). In this case, change the SVP or secondary window to View mode.

Procedure

  1. Click Storage Systems, and then expand the Storage Systems tree.

  2. Click Pools.

  3. Select the DP-VOL to be deleted.

  4. If you selected a DP-VOL with data direct mapping, do the following:

    1. Block the DP-VOL.

    2. Disconnect the external volume that has the Data Direct Mapping attribute that is associated with the DP-VOL blocked. Either disconnect the external storage system or disconnect the external volume.

      Disconnecting the external volume might output SIM RC=627xxx (xxx is the pool ID), which indicates blocked pool-VOLs.
  5. Select the Virtual Volumes tab.

  6. From the table, select the DP-VOL to be deleted.

    Do the following, if necessary:
    1. In the Filter option, select ON to filter the rows.
    2. Click Select All Pages to select all DP-VOLs in the list.
    3. Click Options to specify the unit of volumes or the number of rows to view.
  7. Click More Actions Delete LDEVs.

  8. In the Delete LDEVs window, click Finish.

  9. In the confirmation window:

    1. Confirm the settings.

    2. Accept the default task name or enter a unique name.

      You can enter up to 32 letters, numbers, and symbols, except these:

      \ / : , ; * ? " < > |

    3. If you want to monitor the task after submitting it, select Go to tasks window for status.

  10. Click Apply to submit the task.