On Sun, Apr 12, 2009 at 08:15:04AM +1000, Alex Samad (a...@samad.com.au) wrote:
> > recovery of a partially lost lv is rather painful. > > somebody else suggested a process on how to fix a missing pv (using > /dev/zero) and then fsck'ing thus giving you a mountable partition, but > how do you tell which files are valid and which are not ! Quite often you can do that by examining the files themselves, although admittedly not always. > Can you outline a process that allow you to find out which pv a file > exists on ? Sure: Use debugfs to determine which blocks the file uses, apply a little math to get from blocks to extents, then lvdisplay --maps to find out which pv they're on. Of course, if the lost pv contains the inode(s) of the file you want, it gets harder - even the fsck trick isn't likely to work. I have once rescued a file under such circumstances by searching for known pieces of the file content - not fun. With a binary file it would've been all but impossible. -- Tapani Tarvainen -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
