•**Segment Size - Displays the amount of space assigned to a volume in megabytes (MB).

•**Read ahead - Displays the cache read ahead multiplier.

•**Edit - Click the button corresponding to the volume you want to edit. See the topic, ”Modifying the Cache Settings (Engenio and Sun 6130)” on page 319 for more information.

•Delete - Click the button corresponding to the volume you want to delete. See the topic, ”Deleting a Storage Volume” on page 327 for more information.

*This option is available to only HDS storage systems. **Not accessible to all storage systems.

To create a volume, click the New Volume button in the upper-right corner of the page. To delete several volumes at once, select the volumes you want to delete and then click the Delete

Selected Volumes button.

See ”About Volumes on HDS Storage Systems” on page 324 if you have an HDS storage system.

About Volumes on HDS Storage Systems

Volumes from single LDEVs are shown as LDEV:0 on HDS storage systems. When volumes made up of multiple LDEVs are first created, they are not mapped to a target port on the storage system. The software remembers these LDEVs constitute a single volume, but it does not make changes to the storage system until the volume is mapped to a port. As a result, they are referred to as Groups, for example:

Group:0(LDEV:0, LDEV:1)

where 0 in Group:0 is the volume identifier and LDEV:0 and LDEV:1 are the LDEVs that make up this volume.

After you create a storage volume on an HDS storage system, you must map the volume to a target port on the storage system. You can map the volume to the target port by using the storage system Provisioning tool. In the tool, click Step 3, LUNs.

Once the volume is mapped, it is displayed as a logical unit size expansion (LUSE), as shown below:

LUSE:0(LDEV:0, LDEV:1)

where 0 in Group:0 is the volume identifier and LDEV:0 and LDEV:1 are the LDEVs that make up this volume.

Creating a Storage Volume

IMPORTANT: Some storage vendors require a password to access the storage system. If the same password is not entered, an authentication error message is displayed. Refer to Options > Storage Essentials > Discovery > Run Discovery Details Collection in HP Systems Insight Manager to determine the user account that was used to access the storage system during discovery.

When you create a storage volume, you can set its size, volume capabilities, and storage pool.

324 Provisioning Manager