[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!

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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