Apple Xserve RAID: Using RAID 1.2 Admin and Disk Utility - Manual (Page 16)

16 Chapter 2 Working With RAID Arrays
Important: Once you create an array, you cannot change its type or remove drives
from it. Be sure to plan the arrays carefully to avoid having to remove an array later. You
can expand an array by adding one or more drives to it. See “Expanding an Array” on
page 38 for more information.
As you plan your arrays, keep in mind that each RAID controller can have up to three
arrays.
To create a RAID array:
1 In the RAID Admin window, click Create Array.
2 If necessary, enter the management password and click OK.
3 In the Create Array window, select the RAID level you want to use.
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.
4 Click the box on each drive you want to include in the array.
5 Choose the options you want.
• “Use RAID Now background initialization” lets you use the RAID array without waiting
for initialization to finish. While the array is being initialized, data read and write
speeds will be somewhat reduced. If this option is off, initialization takes place before
the array is visible on the host system.
Note: The array cannot be seen by the host computer before initialization is
complete unless RAID Now is used.