How do I configure backup exec so that media for one job does not overwrite expired media allocated for other job?
You cannot
If the option to "Use Overwriteable media in the target media set before scratch media" is selected, BackupExec will first look for the target media set. if it does not find an overwriteable media in that set it will look for ANY overwriteable media. If it finds any, it will overwrite it, regardless of what media set it currently belongs to.
For tapes in a loader/library you can create partitions and point your jobs to the partitio n associated with the tape you want to use
For D2D jobs, all you can do is set the media set OPPs as appropriate. If you have three disks and rotate the disks each week, set the OPP for 20 days
