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recover from cold backup

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navin
Super Advisor

recover from cold backup

Hi ,
I had a bad root disk it does nothave mirror .all i have is cold backup.what is the procedure to recover a system form cold backup
thanks
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8 REPLIES
Patrick Wallek
Honored Contributor
Solution

Re: recover from cold backup

>>I had a bad root disk it does nothave mirror

I hate when that happens. That's why I have mirroring on ALL servers.

>>all i have is cold backup

What kind? How was it taken?

>>what is the procedure to recover a system
>>form cold backup

That will depend on your answer to the question above.
James R. Ferguson
Acclaimed Contributor

Re: recover from cold backup

Hi:

I hope a "cold backup" is an Ignite recovery tape or Ignite image. Is it?

Otherwise, I hope yu have your installation media handy too.

Regards!

...JRF...
navin
Super Advisor

Re: recover from cold backup

Patrick,James..thanks for the reply.

The backups are taken by the netbackup software.
Thanks
Learning ...
Patrick Wallek
Honored Contributor

Re: recover from cold backup

OK, then you will need to reinstall the OS on your system via CD/DVD media, install the appropriate patches, and then install the netbackup agent.

After that is done, you can restore whatever else you need.
navin
Super Advisor

Re: recover from cold backup

Thanks much for the reply again. After the base os install from media - if i do restore from backups - that will take care of the installed software and patches.right patrick
thanks
Learning ...
James R. Ferguson
Acclaimed Contributor

Re: recover from cold backup

Hi (again) Navin:

> The backups are taken by the netbackup software

This isn't good at all.

If the root disk is partially usable, I would first try getting an Ignite recovery tape made from it.

Without an Ignite image, you may have to install the operating system from your installation media from scratch. You will have to re-establish networking, etc. Then (after that pain subsides) refresh from your backup your custom configuration files (e.g. /etc/passwd, etc. etc.) and begin to re-customize your environment.

You can 'vgimport' your non-vg00 volume groups using:

# vgimport -m /etc/lvmconf/vgNN.mapfile -s -v /dev/vgNN

...after first restoring from your backup the '/etc/lvmconf/vgNN.mapfile' files. If you _didn't_ back these up, you can still 'vgimport' by first doing a 'vgscan' to rebuild the 'etc/lvmtab' file. Once you build this file, 'strings /etc/lvmtab' will show you the physical device files to specify for the 'vgimport'. See the 'vgscan' and 'vgimport' manpages for more information.

Regards!

...JRF...
OldSchool
Honored Contributor

Re: recover from cold backup

Well...in your other post on this same topic -

http://forums13.itrc.hp.com/service/forums/questionanswer.do?threadId=1336820

you asked about dd from working disk / system. if that working system is close to the "dead" one, you might make a an ignite backup of that one and install it on the dead drive....

other than that, the once you're able to restore the "netbackup", you'll be back to where you were when that was taken....provided it has all of the data you need for the root volumes.

hopefully, your data *doesn't* reside in vg00, so you only need to restore those directories residing on vg00.
Steven E. Protter
Exalted Contributor

Re: recover from cold backup

Shalom,

Base OS from media means everything you did, every custom configuration is lost.

Ignite make_tape_recovery or make_net_recovery restores everything from the boot partition.It preserves network configuration lvm layout.

Procedure:
1) Install Os.
2) Install all third party software and patches.
3) Restore data from backup unless you were fortunate enough to have it off system, e.g. NFS, Fiber Network, whatnot.

I've done this. Depending on the complexity of the applications, it could take days.

SEP
Steven E Protter
Owner of ISN Corporation
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