Dell OpenManage Server Administrator Version 7.2 Manual do Utilizador Página 41

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Understanding RAID Concepts 41
Figure 3-5. RAID 6
RAID 6 Characteristics:
Groups
n
disks as one large virtual disk with a capacity of (
n
-2) disks.
Redundant information (parity) is alternately stored on all disks.
The virtual disk remains functional with up to two disk failures. The data
is reconstructed from the surviving disks.
Better read performance, but slower write performance.
Increased redundancy for protection of data.
Two disks per span are required for parity. RAID 6 is more expensive in
terms of disk space.
Related Information:
Organizing Data Storage for Availability and Performance
Comparing RAID Level and Concatenation Performance
Controller-supported RAID Levels
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