Appendix B: Understanding RAID ● 82
RAID 1 Enhanced Arrays
Note: RAID 1E is an upgrade feature; if the RAID 1E feature is locked,
see Adding Enhanced Features on page 20 for information on purchasing
a feature key.
A RAID 1 Enhanced (RAID 1E) array is similar to a RAID 1 array except
that data is both mirrored and striped, and more disk drives can be
included. A RAID 1E array can be built from three or more disk
drives—depending on the stripe size, the maximum number of disk
drives ranges from eight to sixteen.
In the example below, the large bold numbers represent the striped
data, and the smaller, non-bold numbers represent the mirrored data
stripes.
isk Drive 2
isk Drive 3
400 GB
400 GB
isk Drive 1 400 GB
Disk Drives in Logical Drive
Disk Drive 1
Disk Drive 2
Disk Drive 3
RAID 1E Logical Drive = 600 GB
3
2 6
5
2
1 5
4
1
3 4
6
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