The storage array is reporting the following error:
Failure Entry 1: HOT_SPARE_MISSING-Recovery Failure Type Code: 203
Dell MD3860f storage array
NetApp E5660 storage array
This can be caused by several things:
You may see something like this. Notice the first drive listed is showing as "Standby (Missing)". However, the same exact drive in the same drawer and slot is showing at the bottom as "Standby (Optimal)"
You may also see just two drives listed, one that says Missing and the other that says Optimal.
Gather a support bundle from the storage array.
In almost all cases, this is caused by one of the two hot spare drives failing. Usually the storage array volumes will remain healthy and optimal, but the hot spare should be replaced as soon as possible to prevent volume failures in the future.
Contact technical support for further assistance and be ready shipping information for a new drive.
If both hot spares are present in the array (showing as Hot spare standby - Optimal) and the entire storage array is showing Optimal, then the 'ghost' hot spare can be manually deleted in the SANtricity client.
If you cannot unassign the drive in SANtricity, contact technical support for further assistance.
See this article for other reasons a drive may fail: Disk drive failed in the Security Analytics storage array
keyword: hotspare