User`s guide

Chapter 1
Drive Number and RAID Level
The choice of RAID level for logical RAID drives depends on the number of drives
within a drive group. The following table lists the RAID levels for drive group and
RAID level requirements.
RAID Level
Drives in
Drive
Group
Usable
Storage
Data
Redundancy
0
2

8
All
No
1
2
50%
Yes
0 + 1
3

8
50%
Yes
5
3

8
66%

87%
Yes
JBOD
1
All
No
______________________ NOTE ____________________________
To maximize the I/O performance of your multichannel RAID subsystem,
locate each member of a drive group on a separate SCSI channel. This
allows the RAID controller concurrent access to the disk drives.
1-7