Apple Xserve RAID: Using RAID 1.2 Admin and Disk Utility Manuale Utente Scaricare il pdf (Pagina 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)

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 42 43

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Apple Xserve RAID: Using RAID 1.2 Admin and Disk Utility Manuale Utente Pagina 36