Example: Express configuration

If your server contains the following:

Express configuration will create three logical devices and one hot-spare drive as follows:

Logical device A: The total capacity of this logical device is 940 MB (1 x 1024 MB - raid signature) and it contains one, 940 MB RAID level-0 (simple volume) logical device.

Logical device B: The total capacity of this logical device is 2066 MB (2 x 2150 MB - redundant storage - raid signature) and it contains one, 2066 MB RAID level-1 logical device.

Logical device C: The total capacity of this logical device is 8433 MB (3 x 4300 MB - redundant storage - raid signature) and it contains one, 8433 MB RAID level-5 logical device.

Hot Spare: Express configuration defines one of the four 4300 MB drives as a hot-spare drive.

Notes:
  1. When there are four or more ready drives of the same capacity, Express configuration groups three of the drives into one pool (as in logical device C) and defines one of the drives as a hot spare.

  2. A hot-spare drive must be of equal or greater capacity than the drive that it is intended to replace. In this configuration, the 4300 MB drive can replace any failed drives in logical device B or logical device C. logical device A is not redundant, therefore a hot-spare drive is not used.

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