The volume number (LUN) does not change before and after the migration. The host can access the volume
before, during, or after a migration without being affected by the volume number.
The following changes can be performed by RAID Migration.
•
Changing the volume type
A volume is changed to the appropriate type for the migration destination RAID groups or pools (TPP and
FTRP).
•
Changing the encryption attributes
The encryption attribute of the volume is changed according to the encryption setting of the volume or the
encryption attribute of the migration destination pool (TPP and FTRP).
•
Changing the number of concatenations and the Wide Stripe Size (for WSV)
•
Enabling the Deduplication/Compression function for existing volumes
The following processes can also be specified.
•
Capacity expansion
When migration between RAID groups is performed, capacity expansion can also be performed at the same
time. However, the capacity cannot be expanded for TPVs or FTVs.
•
TPV/FTV Capacity Optimization
When the migration destination is a pool (TPP or FTRP), TPV/FTV capacity optimization after the migration can
be set.
For details on the features of TPV/FTV capacity optimization, refer to
"TPV/FTV Capacity Optimization" (page
Figure 28
RAID Migration
TPV (Deduplication/
Compression is enabled)
TPV (Deduplication/
Compression is disabled)
TPV (Deduplication/
Compression is enabled)
TPV (Deduplication/
Compression is disabled)
WSV
FTV
FTV
WSV
Standard
Standard
The volume type depends on the
migration destination.
A volume becomes encrypted
when moved to an encrypted pool.
RAID group
TPP (Encrypted)
TPP (Unencrypted)
FTRP (Encrypted)
FTRP (Unencrypted)
:
Unencrypted volumes
:
Encrypted volumes
Specify unused areas in the migration destination (RAID group or pool) with a capacity larger than the migration
source volume. Note that RAID groups that are registered as REC Disk Buffers cannot be specified as a migration
destination.
RAID Migration may not be available when other functions are being used in the ETERNUS AF or the target
volume.
2. Basic Functions
Optimization of Volume Configurations
64
Design Guide
Summary of Contents for ETERNUS AF S3 Series
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