Apple Xserve RAID: Using RAID 1.2 Admin and Disk Utility - Manual (Page 36)

36 Chapter 4 Using Advanced Features of RAID Admin
On an Xserve RAID system, you can create up to six slices on a controller. There is a
limitation of eight LUNs on each controller, so the total number of unique arrays and
slices cannot exceed eight.
The example in the illustration below shows six slices in a RAID 5 array that contains
four drives. (All slices are the same size.)
Because slices are partitions of the several drives in an array, they provide a way to
manage storage as separate LUNs without having to create an array for each LUN.
Important: When you create slices in an array, all data on the drives in that array will be
erased.
To slice a RAID array:
1 In the RAID Admin window, click Advanced.
2 If necessary, enter the management password and click OK.
3 Select Slicing in the Advanced window and click Continue.
4 In the Slicing window, select the array you want to slice.
This window provides brief details about each RAID level or drive when you click the
button for a RAID level or put the pointer on the picture of a drive module.
RAID 5 array
Yields
LUN 5 LUN 6
LUN 3 LUN 4
LUN 1 LUN 2
Slices across
RAID array
(up to 6)