Fujitsu Eternus DX60 User Manual page 29

Chapter 1 Overview
> 1.2 Configuration
Table 1.3
Table 1.3
RAID level
RAID1
RAID1+0
RAID5
RAID5+0
RAID6
Volume
Logical disk areas in RAID groups are called volumes.
A volume is the basic RAID unit, that can be recognized by the server.
Figure 1.8
• Table 1.4
Table 1.4
ETERNUS DX60
ETERNUS DX80
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
show the recommended number of disks that configures a RAID group.
Recommended number of disks per RAID group
Recommended number of disks
2
4, 6, 8, 10
3, 4, 5, 6
6, 8, 10, 12
5, 6, 7
• Adding more disks to a RAID group improves performance.
• Use of higher capacity disks in a RAID group will increase the time
required for the disk rebuild process to complete.
• Similarly, the more disks per RAID5, RAID5+0, or RAID6 group, the
longer the disk rebuild process will take following a disk failure.
Volume 1
Volume 2
RAID Group 1
RAID group concept
shows the maximum number of volumes that can be set.
The maximum number of volumes that can be set
Model Per RAID group
Max. 128
Max. 128
Per storage system
Max. 512
Max. 1,024
29
Volume 3
RAID Group 2
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