The mirrorGroupStatus element can have the following values:
If this bit is set, the mirror group is fully synchronized.
If this bit is set, all partitions which belong to the mirror group are present.
If this bit is set, the mirror group is operational.
If this bit is set, the mirror group is only partially synchronized.
If this bit is set, the mirror group is in the process of remirroring.
If this bit is set, this mirror ID has been removed from the mirror group to which it once belonged, leaving it in an orphaned state.