Accusys ExaRAID GUI - Manual (Page 61)

Using the RAID GUI
2-21
2.5.2 RAID setup
To perform quick setup, all hard disks must be on-line and unused. Users
can specify the RAID level, number of spare disks, and initiation method
for an easy RAID configuration. See the following for details of each
option.
• Single-controller RAID configuration
A volume (for raid30, raid50, or raid60) or a logical disk (for other RAID
levels) will be created with all capacity of all disks in the RAID enclosure. It
will be mapped to LUN 0 of all host ports. All other configurations will
remain unchanged, and all RAID parameters will use the default values.
• Redundant-controller RAID configuration
Two volumes (for raid30, raid50, or raid60) or two logical disks (for other
RAID levels) will be created with all capacity of all disks in the RAID
enclosure. One volume will be based on two disk groups, so totally there
will be four disk groups. The preferred controller of one volume or logical
disk is assgined to controller A and the other is assigned to controller B.
They will be mapped to LUN 0 and LUN 1 of all host ports on both
controllers. All other configurations will remain unchanged, and all RAID
parameters will use the default values.
HDD
Information This shows the number and the minimum size of
hard disks.
RAID Level RAID 0 / RAID 3 / RAID 5 / RAID 6 / RAID 10 / RAID
30 / RAID 50 / RAID 60
Spare Disks Select the required number of global spare disks.
Initialization
Option Background: The controller starts a background
task to initialize the logical disk by synchronizing
the data stored on the member disks of the logical
disk. This option is only available for logical disks
with parity-based and mirroring-based RAID levels.
The logical disk can be accessed immediately
after it is created.
Noinit: No initialization process, and the logical disk
can be accessed immediately after it is created.
There is no fault-tolerance capability even for
parity-based RAID levels.