HP XP Array Manager Software - Manual (Page 78)

Editing an external LDEV tiering rank for a Smart pool
Users can configure external LDEV tiering rank.
Prerequisites
Perform the following tasks beforehand:
• Connect the external storage system.
• Define hardware tiers that consist of external volumes.
1. From the Resources tab, select Storage Systems. Expand the tree and select the target THP Pools
of the storage system.
2. Select the target Smart pools, and click the THP Pool Vols tab.
3. Select the target Smart pool volume, and click the Edit External LDEV Tier Rank button.
4. Specify the necessary items, and execute the plan.
When you select the target Smart pool from the tree view in the Resources tab, check that the external
LDEV tiering rank for the Smart pool volume has been changed.
Related topics
• About virtualizing storage tiers , page 68
Allocating and unallocating volumes
This module describes volume allocation, provides information about volume allocation requirements,
describes multiple ways in which you can allocate volumes, and provides related procedures for
allocating volumes and editing volume or host access.
About allocating volumes
Volume allocation makes storage capacity available to host applications or clustered hosts and
applications. Hosts must already be registered before volume allocation.
Depending on your registered storage systems, volumes can be allocated using basic volumes, pool
volumes, or volumes from a tier. Basic volumes are volumes from a parity group. Any storage system
can provide basic volumes. Allocating THP/Smart pool volumes involves grouping resources on
storage systems that support this feature. THP/Smart pools must exist prior to volume allocation from
a THP/Smart pool. To allocate volumes from a tier, a Tiered Storage Manager license is required,
and tier policies must be established for storage systems that support tier policy configuration.
The following rules and behaviors apply when allocating volumes:
• Settings that are assigned when allocating volumes to a host become the default settings for the
next time you allocate a volume to the same host. You can change these settings during volume
allocation.
• If a variety of volumes with different characteristics have been allocated to a host, when you allocate
a new volume, you can select an existing volume to set the volume allocation criteria.
• When allocating a volume, if no volumes match the specified requirements, new volumes are
created from unused capacity and allocated to the host. When a basic volume is created, the
volume is also formatted at the same time.
Managing storage resources in a SAN environment 78