Most of our backup jobs are linked, first the job writes to a deduplication disk and then duplicates to tape. We've been running into situations where the dedup job finishes and we have a large number of duplicate to tape jobs pending as all tape drives are in use. All of these pending to tape jobs are listed as "Ready, No writable idle devices."
Because the backlog would not be caught up for the next round of backups, we wished to cancel these "Ready" jobs, but there is no way to do so. When I spoke with support they suggested puttting jobs on Hold or changing the schedule of the main job, but none of these accomplish what we want, to simply Cancel a duplication just that's waiting to write to tape (job status Ready).