Will the still running Backup to Tape Job from Monday immediately use the Tuesday's tape?
Yes. Backup to tape job sits in idle status unless the new tape is loaded - when it happens all the restore points created before plus just created restore point would be written on tape.
Backup to Tape Job for Tuesday can’t use the tape anymore due to retention policy and is waiting for a correct tape again
Could you please elaborate: what retention would prevent backup to tape job to write restore points which were created while backup to tape job was waiting for a new media?
Currently we don’t use media sets
Media set is a bunch of tapes (or one tape) taken from the specified media pool for backup to tape job/file to tape job, and it is created/or used each time backup to tape job run. Media pool settings would allow you to specify media set creation option and create tape retention.
I suggest you to use the following options on Media Pool:- Do not create; continue using the current media set;
- Never overwrite data
This would ensure you would have every backup written on tape that is currently loaded into the drive, and data would not be overwritten. However when you are out of space - you would need to change tape media anyway.
As for backup to tape window, we have this option in backup to tape job settings > schedule >As new backup files appear – Schedule button. You can select time window when job would not look after the new backups created during the specified time period. In case the job would exceed time window it will continue to run unless the backup to tape finishes, but again it should not terminate job.
For the detailed explanation of all Media Pool / Backup to Tape options please refer to User Guide p.424
where all the settings are fully described