Raid Migration; Figure 5.10 Example Of Raid Migration 1 - Fujitsu ETERNUS DX80 S2 Overview

Chapter 5 Basic Functions
5.3 Optimization of Volume Configurations
5.3.1

RAID Migration

RAID Migration is a function that transfers a volume to a different RAID group while guaranteeing the
integrity of the data. 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 (e.g. changing
from RAID5 to RAID1+0).
Examples of RAID Migration are shown below.
• Example when transferring volumes from a RAID5(3+1) 300GB SAS disk configuration to a RAID5(3+1)
450GB SAS disk configuration:

Figure 5.10 Example of RAID Migration 1

RAID5(3+1)
300GB
Unused 450GB x 4
450GB
300GB 300GB 300GB
Volume 0
Volume 1
450GB 450GB 450GB
Migrate to another RAID
group and add the capacity
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
Copyright 2013 FUJITSU LIMITED
Unused 300GB x 4
300GB
Migrate to another
RAID group
RAID5(3+1)
450GB
Define Volume 2 additionally
in the surplus space
62
300GB 300GB 300GB
450GB 450GB 450GB
Volume 0
Volume 1
Volume 2
P3AM-4812-11ENZ0