Kylie,
I can understand that disk space may not be available, however:
Disk mirroring.
Utilising disk mirroring, I have always found this the best
"rollback" method for most changes. Again, I have the "luxury" of
veritas volume manager, and mirroring / splitting pairs is relativly
easy.
If this is possible, it does cover every change done to the
system (except DSSU with would not get mirrored).
Catches with this are, you lose resiliance while you are down to a
single drive (un-mirrored), unless you can get a ternary mirror / spare
disks to replace the one you split off (which you keep for your
backout).
** Has anybodyd asked, can a 6.5 catalogue be imported back into 6.0 ?
If so, then what versions of NBU (or other systems) allow you to import
the catalogue from a newer versions ( 5.1 into 5.0 ? 5 into 4.5 ?). My
understanding is no you can't
Based on my understanding of the catalogue issue, the longer you leave
it to backout, the more work is involved in getting back.
If you leave your backout for a week (being used in production
for 7days/nights) you can simply go back to your backup/mirror disk,
however you have lost a weeks worth of backups.
Or before you backout, you take a note of all the tapes / backup
images created since the upgrade, and after reverting to 6.0 doing the
two reads of every tape modified and manually importing the images. Note
this may not even be supported by symantec (import into 6, images
created in 6.5).
When I have done big changes to my systems, I generally give it 24
hours, if I need to go back, after the backout, I ensure I get a full
backup of the "critical DB's", and a successful incremental of
filesysystems that matter.)
If there are issues after this point, then I see it as falling forward.
Adam.
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Kyle
Oliver
Sent: Saturday, 16 February 2008 5:34 AM
To: netbackup list
Subject: [Veritas-bu] Rollback to 6.0 Plan, in case 6.5 flakes out
Hello all,
I am planning on upgrading my NetBackup servers from 6.0 MP4 to 6.5
and I am wondering if there is a roll back to 6.0 option? Is it enough
to back up the c:\Program Files\VERITAS or /usr/openv directories to a
new location and put them back in case of a water landing?
I was going to ghost/flash archive the boxes, but that seems like a
bit of overkill.
Thoughts? Suggestions?
Thanks,
Kyle
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