recover logical volume , how to? Post: 302668005

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Top Forums UNIX for Dummies Questions & Answers recover logical volume , how to? Post 302668005 by jwreese0 on Sunday 8th of July 2012 10:42:00 AM

07-08-2012

Registered User

prpkrk,

I don't have exactly the information you want, but I think I know how to get the results you want. Here are my notes. I have done this exactly ONCE, so YMMV. See if it helps.

**********************

Your sandg is still there, sort of, and the data has not been over-written. It was located on /dev/sdb, which now shows up as completely unused, which is a good thing.

Go to /etc/lvm/backup/sandg. There you will see a fully intact backup of the metadata for sandg. You can use the command vgcfgrestore to restore this metadata. Check the manpage, but I think the command would be:

# vgcfgrestore -f /etc/lvm/backup/sandg

Run it in test mode first with the -t switch.

After sandg has re-appeared, you should be able to see the Logical Volume named �apps_apache_2.2.17', size 2 GB. The formatting should already be there - don't format it. Just mount it and look it over.

If this doesn't work, you can rebuild the Volume Group from the bottom up, by re-creating the Physical Volume. There was only one PE used, so it should be easy. Just extract the proper UUID ffrom the backup or the archive and run:

# pvcreate -uuid <uuid string>

This should replace the metadata ONLY, by over-writing it, leaving the data area of the physical volume intact. Then create the volume group �sandg', add the PV to it, create a Logical Volume with exactly the old name (again drawn from the archive), and everything should line up. You should not need to format it. The fformatting should simply re-appear, as will the data.

jwreese0

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set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
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       o -b, --background Set the background color

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Version 1.23.1							  Sun Jan 8 2012						      set_color(1)