1.
Function
Optimization of Volume Configurations
RAID Migration
RAID Migration is a function that moves a volume to a different RAID group with the data integrity being guar-
anteed. This allows easy redistribution of volumes among RAID groups in response to customer needs. RAID Mi-
gration can be carried out while the system is running, and may also be used to switch data to a different RAID
level changing from RAID5 to RAID1+0, for example.
To migrate volumes to FTRPs with ETERNUS CLI, use the Flexible Tier Migration function.
Volumes moved from a 400GB drive configuration to a 960GB drive configuration
•
Figure 29 RAID Migration (When Data Is Migrated to a High Capacity Drive)
RAID5 (3D+1P) 400GB × 4
Unused 960GB × 4
Volumes moved to a different RAID level (RAID5 g RAID1+0)
•
Figure 30 RAID Migration (When a Volume Is Moved to a Different RAID Level)
RAID5 (3D+1P)
Unused 960GB × 8
The volume number (LUN) does not change before and after the migration. The host can access the volume
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).
LUN0
Migration
960GB × 4
LUN0
Migration
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
Unused 400GB × 4
RAID5 (3D+1P) 960GB × 4
LUN0
Unused 960GB × 4
RAID1+0 (4D+4M)
960GB × 8
LUN0
LUN0
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P3AG-1822-09ENZ0