BE 20.5 maximize tape usage
We have: - one single media server - one library with 8 slots and 1 LTO6 drive - We run a daily job to tape for incremental and a weekly job for full backup. - Each full backup is less than 500 G...
Forum Discussion
Hi,
at first: the APPEND period is a kind of usage-window, meaning as long as append is possible the RETENTION (overwrite) timeframe does not start.
the append time should be as short as possible to have control over the media-usage.
secondly: to put more than a week on a single media is dangerous, because think about the consequences if in week four the write fails because of a "mechanical" issue, you'll loose multiple weeks of data. Each writing access raises the risk of losing (yes, i'm paranoid, but why push your luck?).
third: you can partition the library to divide the available slots for different tasks, meaning you could mark the slots for the operators clearly and use only specific slots for specific jobs see https://www.veritas.com/content/support/en_US/doc/59226269-137906722-0/v53896777-137906722
regards
Gerhard
Thanx. I agree to your general risk analysis. But I think our risk weights less because we plan to write only every 4th backup to the same tape so in the case of tape damage there will be 3 consecutive backups on different tapes available. We change the tape after every full backup.
