Dell 3 - Manual (Page 101)

Configuring PERC 3 99
Random Array Deletion
The PERC controllers support random array deletion, which is the ability to
delete any unwanted logical drives and use that space for a new logical drive.
This section describes the impact of random array deletion from the user
perspective. It discusses the configuration module architecture
modification, and the data structure.
NOTE: Refer to Chapter
11 and Chapter 12 for the
procedures for random
array deletion.
Overview
On a running operating system, you can not delete a physical drive entry in
the drive object repository. Additions and deletions can be done only at the
end of the repository. The operating system driver receives this support from
the firmware and maintains the same object repository table for that session
of the operating system.
8 RAID 50
(spanned)
Good Yes 75%
16 RAID 10
(spanned)
Excellent Yes 50%
16 RAID 50
(spanned)
Good Yes 88%
32 RAID 0 Excellent No 100%
32 RAID 10 Good Yes 50%
32 RAID 50 Good Yes 94%
Ta b l e 7 - 1 2 . A r r a y C o n f i g u r a t i o n P l a n n e r (continued)
Number
of Drives Possible RAID
Levels Relative
Performance Fault
Tolerance Effective
Capacity