Raid Migration; Figure 1.13 Example For Use Raid Migration 1 - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview
1.3 Functions
1.3.4

RAID Migration

RAID migration is a function that transfers a volume to a different RAID group with the data
integrity being guaranteed. By using RAID migration, RAID levels and volumes can be hot
switched. 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.
The example of RAID migration is as follows:
• Example when transferring volumes from a RAID5(3+1) 300GB disk configuration to a
RAID5(3+1) 450GB disk configuration:

Figure 1.13 Example for use RAID Migration 1

RAID5(3+1)
300GB 300GB 300GB 300GB
LUN0 600GB
LUN1 300GB
Unused 450GB 4
450GB 450GB 450GB 450GB
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
Copyright 2011 FUJITSU LIMITED
Unused 300GB 4
300GB
Migrate to another
RAID group
RAID5(3+1)
450GB
Migrate to another RAID
group and add the capacity
Define LUN2 additionally
in the surplus space
42
300GB 300GB 300GB
450GB 450GB 450GB
LUN0 600GB
LUN1 300GB
LUN2 450GB
P3AM-3042-08ENZ0