Fujitsu ETERNUS AF250 - Figure 29 RAID Migration (When Data Is Migrated to a High Capacity Drive); Figure 30 RAID Migration (When a Volume Is Moved to a Different RAID Level); RAID Migration

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
LUN0
Unused 960GB × 4
Unused 400GB × 4
RAID5 (3D+1P) 960GB × 4
LUN0
Migration
•
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) 960GB × 4
LUN0
Unused 960GB × 8
Unused 960GB × 4
RAID1+0 (4D+4M) 960GB × 8
Migration
LUN0
LUN0
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).
1. Function
Optimization of Volume Configurations
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FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays
Design Guide (Basic)
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