User's Manual

4 Contents
Common Storage Tasks . . . . . . . . . . . . . . . . . 28
3 Understanding RAID Concepts . . . . . . . 31
What Is RAID? . . . . . . . . . . . . . . . . . . . . . . 31
Hardware and Software RAID
. . . . . . . . . . . 31
RAID Concepts
. . . . . . . . . . . . . . . . . . . 32
RAID Levels . . . . . . . . . . . . . . . . . . . . . 33
Organizing Data Storage for Availability
and Performance
. . . . . . . . . . . . . . . . . . . . . 33
Choosing RAID Levels and Concatenation . . . . . . . 34
Concatenation
. . . . . . . . . . . . . . . . . . . 35
RAID Level 0 (Striping) . . . . . . . . . . . . . . . 36
RAID Level 1 (Mirroring)
. . . . . . . . . . . . . . 38
RAID Level 5 (Striping with distributed parity)
. . . 39
RAID Level 6 (Striping with additional
distributed parity) . . . . . . . . . . . . . . . . . . 40
RAID Level 50 (Striping over RAID 5 sets) . . . . . 42
RAID Level 60 (Striping over RAID 6 sets)
. . . . . 44
RAID Level 10 (Striping over mirror sets)
. . . . . . 46
RAID Level 1-Concatenated
(Concatenated mirror) . . . . . . . . . . . . . . . 48
Comparing RAID Level and Concatenation
Performance
. . . . . . . . . . . . . . . . . . . . . . . 49
No-RAID
. . . . . . . . . . . . . . . . . . . . . . . . . 51
4 Quick Access to Storage Status
and Tasks
. . . . . . . . . . . . . . . . . . . . . . . . 53
Storage Dashboard and Storage Health. . . . . . . . . 53