Baslinux mailing list

[sindi keesan <keesan AT sdf.lonestar.org>]

On Sun, 27 Feb 2005, Alejandro Lieber wrote:

> > From the loop, doing:
>
> e2fsck -b 8193 /dev/hda2

Try multiples of 4096 WITHOUT adding the 1 - another site suggested 32768 
and 98304 and 163840.  I really don't understand this but I did get it 
working once.  Unfortunately the superblock backups are in different 
places on different drives and mke2fs reports them and I never bother to 
write that down.

I recall getting a message something like yours but somehow I got it to 
work.

> gives:
>
> --------------------------------------------------------
> e2fsck: Attemp to read block from filesystem resulted in
>        short read while trying to open /dev/hda2
> could be a zero-lenght partition ?
> ---------------------------------------------------------
>
> but fdisk gives the correct size for hda2.
>
> I think the problem began after I mounted the loop to hda2,
> and ended the sesion without unmounting it.
>
> Luckily, I have a nearly identical loop copy of the hda2 files, so I
> will format again hda2 and transfer the loop to hda2 with Steven
> script.
>
> Alejandro.
>
>
> On 28 Feb 05 at 8:26, 3aoo-cvfd AT dea.spamcon.org wrote:
>
> > Alejandro Lieber wrote:
> > > After using BL3 for several months, I get the
> > > following error trying to boot form the HD:
> > >
> > > EXT2-fs error ...ext2_check_descriptor:
> > > Block bitmap for group 0 not in group !
> > > EXT2-fs: group descriptor corrupted |
> >
> > This is probably coming from e2fsck (which runs
> > automatically in /etc/rc).  Normally e2fsck silently
> > fixes little problems with the filesystem, but this
> > appears to be a big one.  There are several possible
> > causes:  bad sector on HD, HD controller error, user
> > error (eg misdirected dd), cosmic rays, usw.
> >
> > sindi keesan wrote:
> >
> > > My Linux Doctor suggests that you try
> > > e2fsck -b 8193 (partition)
> >
> > That's worth a try.  Mount the partition from outside
> > (eg from a ramdisk version of BasicLinux) and try some
> > e2fsck commands.  See "man e2fsck" for an explanation
> > of what different options mean.
> >
> > BTW, even when the system is booting OK, it might be
> > reassuring to see what e2fsck is doing at boot.  By
> > default BL3 runs e2fsck quietly, but you can make the
> > output visible by doing the following:
> > --------------------------------------------
> > edit /etc/rc
> > change "e2fsck -pf" to "e2fsck -f"
> > put # in front of last line (cat /etc/issue)
> > --------------------------------------------
> >
> > Cheers,
> > Steven
>
>
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> ---------------------
> Ing. Alejandro Lieber
> Rosario     Argentina
> ---------------------
>
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keesan AT sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org