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Continuing append on full tape

Norco
Not applicable
We are having problems setting up the backup jobs to our likely.  What we are trying to achieve is that we can fit about four to five backups on one tape.  We have our overwrite protection set to 5 weeks and append set to infinite.  So say we have a new tape and we use it, it then goes into storage for 6 weeks, we use it again and it appends the backup onto the tape, goes back in storage for 6 weeks, we continue this cycle as needed.  Well when we hit the 4th or 5th backup on that tape it will append until full, then go and use other tapes in that media set that we have available in our tape library.  What we would like to happen is that it append to the tape and when it's full, erase the oldest data sets(notice not media set, I don't want it to erase/use the oldest tape) on that same tape and finish the job.  The problem is we are having backups that take 1/5th of a tape span across two or three tapes because it's appending till full and continuing onto the next tape.  We'd like to do it in a way so that after awhile the tapes are almost always full and when a backup occurs it will erase the oldest data sets on a given tape to perform the backup.  Obviously we are using Backup Exec 11d, running in a Windows 2003 environment(although I don't think that matters).
1 REPLY 1

Ken_Putnam
Level 6
Can't do it
 
Tape is sequential access, not random.  that means once data is written to the tape, in order to reuse that space, all you can do is start writing again from the beginning (overwrite)
 
and once an append option  fills a tape up, all that BackupExec will do is Overwrite a new volume.  You cannot append to the second volume