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Full Discussion: LVM restore / recovery
Special Forums Hardware Filesystems, Disks and Memory LVM restore / recovery Post 302245000 by otheus on Thursday 9th of October 2008 06:07:36 AM
Old 10-09-2008
Ouch!

Have you done ANYTHING to md0 or the underlying devices since then??

I believe that md0 uses an on-disk block for tracking meta information, but that essentially, the underlying partitions are simply kept in sync as normal filesystems are. Translation: you can directly mount the underlying file system. If they're not too out-of-sync, you can just fsck and mount. If the fsck fails at first because the md0 blasted it (unlikely), you can just use a backup superblock and specify that to fsck.
 

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mountall(8)						      System Manager's Manual						       mountall(8)

NAME
mountall - Mount filesystems during boot SYNOPSIS
mountall [OPTIONS]... DESCRIPTION
mountall reads fstab(5) and calls fsck(8), mount(8) and swapon(8) in the correct order to mount filesystems once the underlying devices have been created by udevd(8). This is a temporary tool until init(8) itself gains the necessary flexibility to perform this processing; you should not rely on its behav- iour. OPTIONS
--daemon Detach and run in the background. --force-fsck Force check of all filesystems. --fsck-fix Attempt to fix all fsck errors. --no-events Do not emit events after mounting filesystems. --dev-wait-time=value (in seconds) In case of bootwait or timeout: specify the time to wait for device to be detected. The default is 30 seconds. Legal values are between 1 and 2147483647 seconds. -q, --quiet Reduce output to errors only. -v, --verbose Increase output to include informational messages. --help Display this help and exit. --version Output version information and exit. AUTHOR
Written by Scott James Remnant <scott@netsplit.com> BUGS
Report bugs at <https://launchpad.net/ubuntu/+source/mountall/+bugs> COPYRIGHT
Copyright (C) 2009 Canonical Ltd. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. upstart 2009-09-07 mountall(8)
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