The number of drives reported for this library is different from the number of drives detected by DPM. If any drives are ...

The number of drives reported for this library is different from the number of drives detected by DPM. If any drives are out of the library for servicing, ignore this alert; otherwise, remap the drives within the library manually. For information about remapping tape library drives, see the System Center 2012 R2 DPM Operations Guide.