[K12OSN] Re: Help! Please!
Ascension Tech
ascensiontech at gmail.com
Wed Dec 15 21:03:27 UTC 2004
Thanks for the reply. Sorry about the vagary. Yes unfortunately it
was mounted. Does that mean this partition is unrecoverable? No I
don't have a backup of the /boot partition. When you say this:
> Or another machine with an identical partition
> that you could copy? Then you could reformat and dump the
> backup.
Do you mean that I could do a minimal install on a spare machine with
the exact same size /boot partition and array and copy it over?
If that's not possible, since it's safer, how do get knoppix to
recognize my md1 array instead of 2 identical partitions.
Thanks again!
Peter
On Wed, 15 Dec 2004 11:51:30 -0500, Frank Samuelson <fws4 at cdrh.fda.gov> wrote:
> You're a little light on details, but here goes
>
> Ascension Tech wrote:
> > Oh man, am I screwed! I had a filesystem problem after a reboot
> > saying 'extended attribute block...reference count 18 should be 17"
> > for md2 . I freaked out and ended up accidentally fscking up my md1
> > array instead (I think may be /boot. doe!). Then it was saying "bad
> > magic number in super-block". Booting says after grub "VFS: can't
> > find ext3 filesystem on dev md1".
>
> This is very odd. Fscking the disk shouldn't hurt it. Was it
> mounted at the time?
>
> > Linux Rescue from the cd can't find
> > a file system at all but I think that may be sata driver related
> > because knoppix sees some of it, thankfully the raid 1 partitions of
> > my /home.
>
> You're good then, no?
>
> > Obviously I'm new to this and I wouldn't say this machine
> > is in full production (planned for the 2nd semester). But if it can't
> > be saved I would like to save at least my /home directory, which has a
> > webmin batch file of users as well as some peoples docs. Can someone
> > help me recover some or all this?
>
> Do you have a back-up of the partition (/boot?) that you
> destroyed? Or another machine with an identical partition
> that you could copy? Then you could reformat and dump the
> backup.
>
> > If I try and copy /home to another
> > drive do I need knoppix to recognize it as a raid partition
>
> This would probably be the safest thing to do.
>
> > or can I
> > just copy one since they are exactly the same size?
>
> As a matter of fact, you can. A single device from a RAID1 drive
> will mount and read like a regular drive, although I wouldn't
> necessarily recommend it. If you do this, you may want to mount it
> read-only if you can.
>
> > For the original
> > reference count error should I just have let it fix?
>
> Probably, unless you know more about the structure of ext3
> file systems than the people to wrote the program. :)
>
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