Could you please run this query on the instance where the backup was taken?
This query should tell you the full backup set that the differential backup requires.
| Code: |
| SELECT d.physical_device_name FROM msdb..backupset a INNER JOIN msdb..backupset b ON a.database_backup_lsn = b.checkpoint_lsn INNER JOIN msdb..backupmediafamily c ON a.media_set_id = c.media_set_id INNER JOIN msdb..backupmediafamily d ON b.media_set_id = d.media_set_id WHERE c.physical_device_name LIKE '%DIFF_Onyx_20130116_023012.sqb' |
This query should tell you the full backup set that the differential backup requires.