Creating DP-VOLs

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, FMD DC2, 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 the following 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 Create LDEVs.

    The Create LDEVs window appears.

  2. From the Provisioning Type list, confirm Dynamic Provisioning is selected.

    If not, select Dynamic Provisioning from the list.

  3. 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 the following 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.

    If the first DP-VOLs of which the capacity saving setting is Deduplication and Compression are created in a pool, the deduplication system data volumes are automatically created.

  4. 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.

  5. If the pool is to be used by active flash, select Active Flash.

    Note

    To use active flash, pool volumes whose drive type is SSD, FMD DC2, must already be installed. If there are no pool volumes available using these drive types, this checkbox cannot be selected.

  6. Select the pool as follows:

    1. From the Drive Type/RPM list in Pool Selection, select the data drive type and RPM.

    2. From the RAID level list, select the RAID level.

    3. Click Select Pool.

      The Select Pool window appears.

    4. 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 the following:

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

      You can select only one pool. When Enable is selected in step 6, the Dynamic Tiering pools appear, and when Disable is selected, only the non-Dynamic Tiering pools appear.

      Perform the following 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 closes. The selected pool name appears in Selected Pool Name (ID), and the total capacity of the selected pool appears in Selected Pool Capacity.

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

  8. In the LDEV Capacity text box, 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.

  9. In the Number of LDEVs text box, enter the number of LDEVs to be created.

    You can enter the number of LDEVs within a range of the figures displayed below the text box.

  10. In the LDEV Name text box, enter the DP-VOL name.

    In the Prefix text box, enter the alphanumeric characters, which are fixed characters of the head of the DP-VOL name. The characters are case-sensitive.

    In the Initial Number text box, type the initial number following the prefix name, which can be up to 9 digits.

    You can enter up to the 32 characters including the initial number.

  11. Click Option.

  12. In the Initial LDEV ID field, 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 appear in blue, unavailable numbers appear in gray, and unused numbers appear in white. LDEV numbers that are unavailable may already be in use or already assigned to another emulation group (group by 32 LDEV numbers).

  13. From the Cache Partition list, select CLPR.

  14. From the MP Unit list, select a 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.

  15. From the Full Allocation field, 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.

  16. From the Tiering Policy field, 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 appear.

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

  17. From the New Page Assignment Tier list, select a new page assignment tier. You can select from levels High, Middle, and Low.

    You can specify the function when the Multi-Tier Pool is enabled.

  18. In the Relocation Priority option, 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.

  19. 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.

  20. If necessary, change the settings of the V-VOLs.

    • Click Change LDEV Settings to open the Change LDEV Settings window.

  21. If necessary, delete a row from the Selected LDEVs table.

    Select a row to be deleted, then click Remove.

  22. Click Add.

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

    The Provisioning Type, Pool Selection, Drive Type/RPM, RAID Level, LDEV Capacity, and Number of LDEVs fields must be set. If these required items are not registered, you cannot click Add.

  23. Click Finish.

    The Confirm window appears.

    To continue the operation for setting the LU path and define LUN, click Next.

  24. In the Task Name in the text box, enter the task name.

    You can enter up to 32 ASCII characters and symbols in all, except for \ / : , ; * ? " < > |. "yymmdd-window name" is entered as a default.

  25. Click Apply.

    If the Go to tasks window for status check box is selected, the Tasks window appears.
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