Increasing pool capacity

Adding the pool-VOL to the pool created for Dynamic Provisioning, Dynamic Tiering, or active flash increases the pool capacity. The amount of pool capacity registered in the pool represents the pool capacity. You need to check the pool free capacity to determine whether additional pool capacity is required. You cannot increase the pool capacity while it is being shrunk.

Notes on using Dynamic Tiering or active flash

• When pool volumes with available monitoring information are added in a pool, tier relocation is performed. When pool volumes without available monitoring information are added in a pool, the page usage rate is averaged in the tier.

• If the pool volumes are added, the tier relocation being performed stops.

Before you begin

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

Procedure

1. Open the Pools window.

In Command Suite:

1. On the Resources tab, click Storage Systems, and then expand All Storage Systems and the target storage system.

2. Right-click DP Pools, and then select System GUI.

In Device Manager - Storage Navigator:

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

2. Click Pools.

2. From the Pools table, select the pool with the capacity you want to increase. You cannot increase pool capacity for multiple pools.

3. Click Expand Pool.

4. In the Expand Pool window, select the pool-VOL.

1. Click Select Pool VOLs.

2. In the Select Pool VOLs window, from the Available Pool Volumes table, select the pool-VOL you want to assign, and then click Add.

The selected pool-VOLs are registered in the Selected Pool Volumes table.

Up to 1024 volumes can be added including the volumes already in the pool. You can use the Filter option to choose volumes by parameter.

 For details about adding of LDEVs carved from accelerated compression-enabled parity groups, see Guidelines for pools when accelerated compression is enabled.

 If necessary, perform the following steps:

• From Filter option, select ON to filter the rows.

• Click Select All Pages to select pool-VOLs in the table. To cancel the selection, click Select All Pages again.

• Click Options to specify the unit of volumes or the number of rows to be viewed.

• To set the tier rank of an external volume to a value other than Middle, select a tier rank from External LDEV Tier Rank, then click Add.

• For a pool, you can add volumes whose Drive Type/RPM settings are the same and whose RAID Levels are different. For example, you can add the following volumes to the same pool:

Volume whose Drive Type/RPM is SAS/15K and whose RAID Level is 5 (3D+1P)

Volume whose Drive Type/RPM is SAS/15K and whose RAID Level is 5 (7D+1P)

• When assigning a pool with DP-VOL enabled with full allocation, LDEVs cannot be added in the parity group with accelerated compression enabled.

3. Click OK.

The Select Pool VOLs window closes. The number of the selected pool volumes appears in Total Selected Pool Volumes, and the total capacity of the selected pool-VOL appears in Total Selected Capacity.

5. Click Finish.

The Confirm window appears.

6. In the Task Name text box, type a unique name for the task or accept the default.

You can enter up to 32 ASCII characters and symbols, with the exception of: \ / : , ; * ? " < > |. The value "date-window name" is entered by default.

7. Click Apply.

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