Migrating volumes – HP XP P9000 Command View Advanced Edition Software User Manual
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Pool conditions
If the target is a pool:
•
The status cannot be blocked.
•
The number of virtual volumes must be fewer than 8,192.
•
When the target is an THP volume, the source and target volumes must be in different pools.
•
The target volume must have more unused capacity than the source volume.
•
The usage rate must not exceed the larger threshold value (threshold 1 or threshold 2), when a
THP pool volume is created in a THP pool.
Restrictions
The following volumes cannot be migrated, even if nothing appears under Migration Restrictions:
•
Cross-system copy-pair volumes.
•
Volumes configured for XRC. Note that a volume in a suspended status can be a source volume,
but not a target volume.
•
Volumes configured for concurrent copying.
•
The migration source volume is configured as a Continuous Access Synchronous pair or Hitachi
TrueCopy for Mainframe pair, and the migration target is an external storage subsystem.
Migrating volumes
You can migrate volumes to a different volume or THP pool by creating migration plans and executing
them as tasks.
To migrate volumes:
1.
From the Actions menu, select Migrate Volumes.
2.
Select the appropriate storage system.
3.
On the Migration Groups tab, click Create MG.
If a migration group already exists, go to step 7.
4.
On the General tab, specify a name, volumes, and other information.
5.
On the Rule tab, specify the following rules:
Parity Group Selection: From the following three methods, specify how the parity groups from
which migration target volumes can be selected are chosen.
• BalanceCapacity: Selects migration target volumes so that the parity groups that are selected
as the migration destination have the same amount of remaining capacity.
• MaximumCoverage: Selects migration target volumes from as many parity groups as possible.
• MinimumCoverage: Selects migration target volumes from as few parity groups as possible.
Parity Group Avoidance of Migration Groups (option): Selects migration target volumes from a
parity group that is different than the migration destination.
6.
If necessary, specify required items on the Notification tab. Click OK and then close the Create
MG window.
7.
Select a migration group.
8.
Select a tier and click Check Compatibility.
A copy pair is created for each migration source volume and its target volume or THP pool.
Setting up and operating a SAN environment
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