03-20-2018 01:26 AM
Greetings!
I have faced such issue:
Unused tapes have dissapeared from media tab. It is not a problem of Library as we have already done inventory and were able to find 600 tapes. In the time interval from inventory of these 600 tapes and dissapearance of unused tapes we have used 300 tapes at least once.
Time went on again and just recently we have recieved error 96 from one of our policies that used this robot.We looked at media tab and were very supprised to see only 300 full medias instead of 600. We made inventory once again, and it easly detected these 300 free media and put them back to fight.
But it was not the only robot which lost it's medias. We have 14 robot total and 4 more of these also lost free medias.As another example: we have 1 robot with 300 tapes and we didn't make it to use so it lost all 300 medias :) .
I would like to know wat might caused this data loss of inventory.
As I had understood: NBU doesn't do inventory by itself, so it doen't refresh the amount of avaliable media just by openening media tab. It queries the library and waits for barcodes to assign media to slots etc.
In that time interval (between inventory and when we realised that everything is gone :))we had done the following: we restarted 3 libraries (1 is physical (Quantum) and 2 is VTL (DataDomain) and we alse did a restart of NBU master server.
What could have caused this?
Many Thanks,
03-20-2018 03:24 AM - edited 03-20-2018 03:25 AM
03-21-2018 03:40 AM
I would agree with Amol.
I have never heard of NBU 'forgetting' about media like this. The media is held in the NBU sql database (nbdb) - it can't accidently lose lines from the media table - it requires a specific SQL command to be run against the database to remove an entry.
If you had DB corruption, then yes, bad things could happen, but corruption is random and wouldn't target specific unsed media - and would almost certainly either cause the nbdb to fail to start/ run or cause some real bad error messages,