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NIKHIL234656595
Level 6

 

 How can I recover an corrupted image?

 

 

 

. How does NetBackup tie together with Media Manager?

 

 

 

 If your last catalog backup was two days ago and the master server crashed what would you have to do to bring your environment back up to present time?

 

what is avr mode

 

1 ACCEPTED SOLUTION

Accepted Solutions

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified
If master server disk has crached, you need to recover 2-day old catalog, then start scanning ALL tapes and disk images with phase 1 import to discover all images written last 2 days. Existing images will be skipped. Follow new imports up with phase 2 import.

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4 REPLIES 4

mph999
Level 6
Employee Accredited

 

 

 How can I recover an corrupted image?
 
You can't.
 
. How does NetBackup tie together with Media Manager?
 
Media manager controls the drives/ robots .  It uses the processes seen in vmps command (will differ from system to system depending on robot type).
 
bptm, bpdm and bpbrm are also mm processes, and will only show up in vmps if jobs are running.
 
The media manager processes run on media servers
 
what is avr mode
 
This shows are drive is not under robot control, it is working as standalone.
 
 
 
 If your last catalog backup was two days ago and the master server crashed what would you have to do to bring your environment back up to present time?
 
With difficulty, you would have to recover from catalog two days old, then providing the images database is ok, you could use NBCC to repair try and repair any inconsistencies.
 
If you are at 7.5, this could be very very difficult due to the images headers being in the EMM database.
 
Martin

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified
If master server disk has crached, you need to recover 2-day old catalog, then start scanning ALL tapes and disk images with phase 1 import to discover all images written last 2 days. Existing images will be skipped. Follow new imports up with phase 2 import.

mph999
Level 6
Employee Accredited

Yes, that's another way Marianne has suggested.

This would work fine if you had a low number of tapes, but it if a big environment with 100's or even 1000's of tapes, this woul d probably be impossible.

If below NBU 7.5, you could manually search the image DB to find the header files created since the catalog backup.  When restoring the catalog backup, the information for these backups in the EMM DB tables will be lost (as you are recovering an old version.

NBCC can be used to rebuild these entries, it is not ideal as the tapes will be marked as full but it is the best fix that can be made.

or ...

If only a few tapes, NBCC can be used to identify them, then they could be expired and imported, from Mariannes suggestion.

At 7.5, the header files are in the EMM db, so they are not available to look through to identify tapes.  If the system is not to broken, you could cat_export the headers to flat files and look in them, if this is not working, you're probably stuck, unless you can phase 1 /2 import.

Martin

mph999
Level 6
Employee Accredited

oh, and fire the backup admin ...   he he he ...

There should be a catalog back taken every day at a minimum.

M