HP XP7 User Manual page 300

Item
Resource Group Name (ID)
External LDEV Tier Rank
Specify the tier rank of the external volume. If there is no external volume in the Available Pool
Volumes table or Selected Pool Volumes table, you cannot select this option.
Add
When you select a row in the Available Pool Volumes table and click Add, the selected pool-VOL
is added to the Selected Pool Volumes table.
NOTE: Up to 1,024 volumes can be added including the volumes already in the pool.
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)
Remove
When you select a row in Selected Pool Volumes table and click Remove, the selected pool-VOL
is removed from the Selected Pool Volumes table.
300 Thin Provisioning Z and Smart Tiers Z GUI reference
Description
If LDEV is a V-VOL for Thin Provisioning, external volume, or migration volume,
a hyphen (-) is displayed.
Displays the resource group names and IDs of the LDEV. The ID is provided in
parentheses.