I don't know where the bug in IDB but in some cases i found 2 extreme behaviours in Data protector.
1. Mount request raised for media which belongs to other pool, even we have enough Media in Expired pool
observations and resolution: This Problem occured in VTL which is having deduplication. so we can't format the slot but we resolved this by making tape protection none ( Allocation order changed to Media) and backup restarted problem resolved.
2. This is a also silly problem we have enough expired tapes (Freepool) in Expired pool. due to firmware(?) problem tape library recognised cleaning tape as UNKOWN Media, when ever backup starts backup going for cleaning tape and it is hanging.
Resolution : Temporerly we formatted required media into required pool . scheduled backup went fine with out any problem.
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