nbu 7.5 media expiration
I have tapes with full backup with 1 month retention.
Now a request came to have retention of one of this clients data to 1 year from the above full backup.
I have searched the media and have extended the retention of the media on which this image is.
Now my query is the image on that tape is of 1 month.After 1 month the image will be expired from the tape although media expiration is 1 year.
Now the tape is empty.
When bpexpdate -deassignempty will run or NBU scheduler will check,This tape will be returned to Scratch pool.
So media expiration date is correct process?
The NetBackup scheduler automatically checks for tapes which are allocated to a media server, but hold no valid images (ie, tapes that are "empty"). This automatic check is performed approximately every 12 hours. If the check identifies an "empty" tape which is allocated to a media server and is not currently being used by a running backup, the tape is expired and returned to the scratch pool.
This check is necessary because if a backup has failed, a tape which was allocated for the failed backup may contain no valid images, but remain allocated to a media server and unused until it expires - which may be for days, weeks, months, or in some cases indefinitely, depending on the retention period of the schedule which execute the failed backup.
Another situation which may also result in a tape that is allocated to a media server becoming "empty" is when all of the images on a tape have been expired prior to the tape's expiration date - for example, by a Storage Lifecycle Policy. The empty tape will remain allocated to a media server until its media expiration date is reached (possibly "forever," if the retention period is infinite), or until it is identified as an empty tape. In this particular situation, failure to expire empty yet allocated tapes may ultimately result in NetBackup having no tapes available for backups or duplications.