Fujitsu ETERNUS DX S5 Series - When the READY LED Is Not On; When the FAULT LED Is On

● 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
LUN0
Unused 1.2TB × 4
Unused 600GB × 4
RAID5 (3D+1P) 1.2TB × 4
LUN0
Migration
• 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)
LUN0
Migration
LUN0
LUN0
RAID5 (3D+1P) 600GB x 4
U
nused 600GB x 8
Unused 600GB x 4
RAID1+0 (4D+4M) 600GB x 8
2. Basic Functions
Optimization of Volume Configurations
75 Design Guide