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RAID Management
The subsystem can implement several different levels of RAID technology.
RAID levels supported by the subsystem are shown below.
RAID
Level
Block striping is provide, which yields higher performance than with
0
individual drives. There is no redundancy.
Drives are paired and mirrored. All data is 100% duplicated on an
1
equivalent drive. Fully redundant.
Data is striped across several physical drives. Parity protection is
3
used for data redundancy.
Data is striped across several physical drives. Parity protection is
5
used for data redundancy.
Data is striped across several physical drives. Parity protection is
6
used for data redundancy. Requires N+2 drives to implement
because of two-dimensional parity scheme
Combination of RAID levels 0 and 1. This level provides striping
0 + 1
and redundancy through mirroring.
Combination of RAID levels 0 and 3. This level is best implemented on
30
two RAID 3 disk arrays with data striped across both disk arrays.
RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50
50
includes both parity and disk striping across multiple drives.
RAID 50 is best implemented on two RAID 5 disk arrays with data
striped across both disk arrays.
RAID 60 combines both RAID 6 and RAID 0 features. Data is striped
across disks as in RAID 0, and it uses double distributed parity as in
60
RAID 6. RAID 60 provides data reliability, good overall performance and
supports larger volume sizes.
RAID 60 also provides very high reliability because data is still available
even if multiple disk drives fail (two in each disk array)
Description
Introduction
Min
Drives
1
2
3
3
4
4
6
6
8
1-9
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