restore /usr with an ignite-ux tape

[matlefou84]

Hi all!

I have a big problem. I delete all the /usr of my system with the command "rm *" and i would like to restore it with a ignite-ux tape (because i have deleted only this FS).
How i do this??
I've boot from the tape and try to use the "HP-UX installation process" and select the "Run a Recovery Shell" but i am stop at this step.
Can you help me please, it's emergency!

Thanks.

[Tom Danzig]

I would suggest recovering the entire recovery tape assumings it is not too old.

I do not think you can only recover /usr though. You would need to do a "mt -t /dev/rmt/0mn fsf 1", however, the mt command resides under /usr/bin (there is a staticly linked tar in /sbin though (which would be needed also). I think you will have to go through with the entire recovery process. Once that is done you can restore newer files if necessary from your normal full backups.

[Tom Danzig]

I am assuming that the system will not boot normally due to the /usr file system issue.

Just a thought: If the recovery shell has the mt command availabel, try:

# cd /
# mount /usr
# mt -t /dev/rmt/0mn fsf 1
# tar xvf /dev/rmt/0mn usr

Good luck.

[RAC_1]

I think you will have to do full recover. Even if you get into single user mode/recovery shell, the mt command won't be availble to restore usr. with everything intact, it is possible to do selective restore from ignite tape.

Anil

[Steven E. Protter]

Ignite is desgned for full recovery of /dev/vg00 if thats what was recovered.

Its best to boot off the tape and do the restore. You can try and extract /usr off the tape but certain things like links may not restore properly.

SEP

[Sanjay_6]

Hi,

If the system has not been rebooted, you can try to recover using the ignite tape using these commands.

cd /
mt fsf 1
/sbin/tar xvf /dev/rmt/0mn usr
mt rew

The device used with the tar command is the no-reqind device.

Hope this helps.

Regds

[Sanjay_6]

Hi,

Take a look at this thread,

http://www1.itrc.hp.com/service/cki/search.do?category=c0&mode=id&searchString=ozbekbrc00000581&searchCrit=allwords&docType=Security&docType=Patch&docType=EngineerNotes&docType=BugReports&docType=Hardware&docType=ReferenceMaterials&docType=ThirdParty

The itrc doc id is OZBEKBRC00000581

You have to boot through the ignite tape, activate root vg, chroot, mount usr and then do the restore.

Hope this helps.

Regds

[Scot Bean]

Here's an idea:

- if you have another, similar machine you do not care about, restore it with your tape, then copy /usr from this machine to yours.

[Tor-Arne Nostdal]

Are you sure the entire /usr is gone...
Normally "rm *" isn't enough..
You must have used "rm -r *"
If /usr/sbin /usr/lbin is available it
might be that you're able to use ftp or r-commands from another machine into this one... (if you have another machine available ;-).

This would help you dramatically.
Otherwise...

As mentioned you can read the ignite tape as a tar backup:
- if you skip the boot-record(lif)
- by using the mt fsf command
- and using a no-rewind device

If you want to restore to a directory other than the original location you must use the pax command instead of tar.
With pax you can substitute the /usr with f.ex. /new_usr

.... but to have access to these commands whicha are located in /usr/... you're likely to first of all boot the machine from the ignite tape as Sanjay already stated.

/Tor-Arne

[matlefou84]

ok, i will try this but i can't make the command "mount /usr" because i haven't the command mount in the recovery shell!
I have tryed to load the command via loadfile (loadfile mount) but the command is already not found.

I think that i can load it with a tape countaining the exec command mount, so i did it but it doesn't work. I have used the tar and pax commands to do this.

Do you have idea ??