Insert Overwritable media
In answer to KHarvey's Comment:
That doesn't quite make sense, because if I cancel the job, and rerun it, it will use the tapes that have already started to be used by the first job. If the job needed to mark as overwritable then that should continue to fail. I have a feeling I am misunderstanding something very simplistic.
If your jobs are set to start as an append then cancelling it and restarting it will allow you to use the same tape because it can append to it.
As has already been indicated a job that has filled a tape and needs another cannot a append and must overwrite to the next tape. If your only available media contains data that is overwrite protected even if that media has space on it, only a job that is starting as an Append (not an Append job that asks for a second tape) can use it.
What this means is your scenario where
What I have found is that when Job 1 starts it will register tape 1 and fill up that tape. Job 2 when it starts will register tape 2 and fill up that tape. Lets say that Job 1 runs a little faster and fills tape 1 all the way, it will then take tape 3 and register tape 3. But lets say that Job1 only fills tape 3 10% of the way then it completes. Now lets say that job 2 fills up tape 2 all the way, job 2 will not load tape 3 to use the rest of the 90% of the tape. This is when I receive the "Please insert overwritable media into the robotic library" error.
Is expected and you have to make another overwritable tape available as any option involving messing with your media sets or media management rules might make your job finish but could end up overwriting the data from Job 1 that is on the start of tape 3 which I suspect would not be desirable.
The other option (again already mentioned in this thread) would be to adjust how much data is selected in your jobs so one job only needs 1 tape and the other job needs slightly more space on 2 tapes.
