Creating pools with data direct mapping 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. Click Create Pools.

  4. From the Pool Type list, select Dynamic Provisioning.

  5. From the Multi-Tier Pool field, select Disable.

  6. From the Data Direct Mapping field, select Enable.

  7. Follow the steps below to select pool-VOLs.

    1. From the Drive Type/RPM list, select a data drive type and RPM.

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

      If you select External Storage from the Drive Type/RPM list, a hyphen (-) appears and you cannot select the RAID level.

    3. Click Select Pool VOLs.

      The Select Pool VOLs window appears.

    4. In the Available Pool Volumes table, select the pool-VOL row to be associated with a pool, then click Add.

      Select one or more volumes to use as pool-VOLs with system area. For the attribute of the volume, which can be used as the pool-VOLs with system area, a hyphen(-) appears in the Attribute column. In addition, the external volume of the data direct mapping attribute can be selected as an option. For the attribute of the external volume of the data direct mapping attribute, Data Direct Mapping appears in the Attribute column. After creating the pool, you can also add the external volume of the data direct mapping attribute.

      You can select a value other than Middle from External LDEV Tier Rank and click Add to set another tier rank for an external volume. The selected pool-VOL is registered in the Selected Pool Volumes table. Up to 1,024 volumes can be added to a pool. If LDEVs in an accelerated compression enabled parity group are used as pool-VOLs, these LDEVs can be assigned to only one pool. LDEVs in an accelerated compression enabled parity group cannot be assigned to multiple pools as pool-VOLs.
      Tip Perform the following steps if necessary:
      • Click Filter to open the menu, specify the filtering conditions, and click Apply.
      • Click Select All Pages to select all pool-VOLs in the table. To cancel the selection, click Select All Pages again.

    5. Click OK.

      The information in the Selected Pool Volumes table is applied to Total Selected Pool Volumes and Total Selected Capacity.

  8. Enter the name in the Pool Name text box.

  9. Click Options.

  10. In the Initial Pool ID text box, type the number of the initial pool ID, from 0 to 127. When you specify a pool ID that was previously registered, the smallest available ID is displayed by default instead of the value you entered. If a pool ID unavailable, no number is displayed.

  11. In the Subscription Limit text box, enter an integer value from 0 to 65534 as the subscription rate (%) for the pool.

    If no number is entered, the subscription rate is set to unlimited.

  12. In Protect V-VOLs when I/O fails to Blocked Pool VOL, select Yes or No. If Yes is selected, when the pool-VOL is blocked, DP-VOL is protected from reading and writing requests. And at the same instant, the access attribute of the DP-VOL is changed to the Protect attribute.

  13. In Protect V-VOLs when I/O fails to Full Pool, select Yes or No. If Yes is selected, when the pool usage reaches the full size, DP-VOL is protected from reading and writing requests. And at the same instant, the access attribute of the DP-VOL is changed to the Protect attribute.

  14. Click Add.

    The created pool is added to the Selected Pools table. If invalid values are set, an error message appears.

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

    If you select a row and click Detail, the Pool Properties window appears. If you select a row and click Remove, the message appears asking whether you want to remove the selected row or rows. If you want to remove the row, click OK.

  15. Click Next.

    The Create LDEVs window appears. If Subscription Limit of the created pool is set to 0%, the Create LDEVs window does not appear.

  16. Click Finish and the Confirmation window appears.

  17. Check the settings in the Confirmation window, and then enter the task name in Task Name. Select the pool radio button and then click Details. The Pool Properties window appears.

  18. Click Apply

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