Product manual

Chapter 7: Technology Background
285
Example
Following is an example to explain the Transition function.
In the example above, there is a four-drive RAID 5 disk array and a global spare
drive. Physical drives 1, 2, 3, and 4 belong to the disk array. Physical drive 5
remains unconfigured. Physical drive 6 is a revertible spare drive.
If a physical drive fails in a disk array and there is a spare drive of adequate
capacity available, the controller automatically rebuilds the array using the spare
1
2
3
4
5
6
Spare
Drive
Array
Drives
1
2
3
4
5
6
Rebuild
to Spare
Failed
Drive