Raid Migration; Figure 28 Raid Migration (When Data Is Migrated To A High Capacity Drive); Figure 29 Raid Migration (When A Volume Is Moved To A Different Raid Level) - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
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 guaranteed. This allows easy redistribution of volumes among RAID groups in response to
customer needs. RAID Migration 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 300GB drive configuration to a 600GB drive configuration
•

Figure 28 RAID Migration (When Data Is Migrated to a High Capacity Drive)

RAID5 (3D+1P) 300GB x 4
Unused 600GB x 4
• Volumes moved to a different RAID level (RAID5 g RAID1+0)

Figure 29 RAID Migration (When a Volume Is Moved to a Different RAID Level)

RAID5 (3D+1P) 600GB x 4
Unused 600GB x 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).
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
LUN0
Migration
LUN0
Migration
Copyright 2023 Fujitsu Limited
Unused 300GB x 4
RAID5 (3D+1P) 600GB x 4
LUN0
Unused 600GB x 4
Unused 600GB x 8
LUN0
LUN0
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