System restore

[Smthian]

Hi,

I am having a nightmare and hope that someone has a few words of advice.

We have two unix boxes which are (but shouldn't) be looking at the same volume group. Net result is corrupt data and we have been advised to restore from mksysb and then restore data from backups.

This is new territory and apologise if the question has been answered many times before. How do I start doing this? Do I stop the system, put key in service mode to restore from mksysb? What impact will that have on the corrupted volume groups I have eg datavg? Will I need to redefine all the filesystems within the volume groups?

Any advice on what to do, what to watch out for and certainly what not to do would be very much appreciated.

 

[Einstein47]

I may be wrong, but I thought that a mksysb only backs up the rootvg volume group. Maybe I am reading your question wrong.

Einstein47
(Sometimes you're the windshield... sometimes you're the bug - Unknown)

 

[fluffybunny]

Ditto that. mksysb only backs up rootvg. Use backup, tar, dd, sysback, etc. to backup other VGs.

2 AIX servers, looking at same volume. One of the AIX servers has to own the volume. The other one will be able to access it though it may not be able to write to it. How can the system get corrupt ?

What version of AIX are you running ?

 

[BFOJ]

savevg is another method used to backup volume groups (i.e., appsvg).

smitty savevg

 

[raztaboule]

restoring rootvg won't impact your datavg.
after restoring rootvg perhaps you will have to exportvg and then importvg but no data will be loss.

but i can't figure out why you should restore rootvg before restoring your datavg.

bye.