A global spare disk is a redundant disk that can automatically take the place of a failed disk in any volume. A failed disk and a spare disk taking over do not need to have the same physical performance characteristics because the replacement is temporary, similar to using a spare tire on a car with a flat tire that needs to be repaired.
IMPORTANT: Having a spare disk takes over after a failure is a temporary solution; replace the failed disk as soon as possible.
To remove a global spare disk:
1. Select System > Storage.
The Storage screen displays (see the figure in Step 2).
2. In the graphical enclosure, click the global spare disk or disks that you want to remove.
You can select disks with a green color coding only. The selected disks are highlighted and the Remove spare button under the enclosure becomes available:
3. Click Remove spare.
The removed spare disk or disks become available again for other purposes (the color of the disks turns black).