User`s guide

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

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

2 6

1 5

3 4