User`s guide

Chapter 5
Creating a Logical RAID Drive
A logical RAID drive is presented to the host operating system as one physical drive.
To the operating system, there is no difference between a controller logical RAID
drive and a single physical drive on a conventional disk controller. A logical RAID
drive consists of part or all of any drive group.
______________________ NOTE ____________________________
For a RAID 5 configuration, the controller must use some of the space for
parity information. When you specify the size, calculate the usable space
according to this formula:
usable space = total space * (N-1/N) where N is the number of drives in
the drive group.
Step
Action
Result
1
Select the Define Logical Drive option.
A screen shows the drive groups
available for selection as logical RAID
drives.
2
Select the Create Logical Drive option.
A pop-up window displays the RAID
levels available for that logical RAID
drive. Unavailable levels are still
visible but you cannot select them.
3
Select the RAID level for the logical
RAID drive.
A pop-up window displays the usable
size of the logical RAID drive.
4
Enter a size for the new logical RAID
drive.
The status block is updated with the
RAID level and size of the logical
RAID drive.
5
Confirm that you want to create this
logical RAID drive. Select Yes.
The system adds the logical RAID
drive to the list at the lower-left of the
screen.
Continued on the next page.
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