Each row reprsents information about an tmnxBsxIsaAaGrpEntry associated
with a Mirror source defined in tMirrorSourceTable.
Entries are created by user.
Entries are deleted by user, or by agent when the tMirrorSourceTable
entry is destroyed.
Entries in this table have an implied StorageType of 'volatile'.
That is, configured mirror source information is not persistent
across system restarts.