Raid Migration; Figure 27 Raid Migration (When Data Is Migrated To A High Capacity Drive); Figure 28 Raid Migration (When A Volume Is Moved To A Different Raid Level) - Fujitsu ETERNUS DX S5 Series Design Manual

2. Basic Functions
Optimization of Volume Configurations
●
Striping for Multiple RAID Groups
Wide Striping
•
Distributing a single volume to multiple RAID groups makes I/O access from the server more efficient and
improves the performance.

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.
Note
To migrate volumes to FTRPs with ETERNUS CLI, use the Flexible Tier Migration function.
Data moved from a 600GB drive configuration to a 1.2TB drive configuration
•
Figure 27 RAID Migration (When Data Is Migrated to a High Capacity Drive)
RAID5 (3D+1P) 600GB × 4
Unused 1.2TB × 4
Volumes moved to a different RAID level (RAID5 g RAID1+0)
•
Figure 28 RAID Migration (When a Volume Is Moved to a Different RAID Level)
RAID5 (3D+1P) 600GB x 4
Unused 600GB x 8
LUN0
Migration
LUN0
Migration
Unused 600GB × 4
RAID5 (3D+1P) 1.2TB × 4
LUN0
Unused 600GB x 4
RAID1+0 (4D+4M) 600GB x 8
LUN0
LUN0
75 Design Guide