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Re: [linux-lvm] mapping blocks to PVs?

On Feb 24, 2002  17:58 -0500, Andres Salomon wrote:
> Ok, assuming the block/sector stuff is correct:
>    --- Physical extents ---
>    PE    LV                        LE      Disk sector
>    00000 /dev/site/lvol1           00000   33144
>    00001 /dev/site/lvol1           00001   65912
> badblocks(2) is not picking up those blocks as being bad; this means I
> need to manually remove the first LE from this LV.  I assume I can
> do something similar to `pvmove -n /dev/site/lvol1:0 /dev/hdf1 /dev/hdb1`
> (hdf1 is the one causing problems, but I can't simply remove the PV from the
> VG w/out deleting lots of stuff).  However, how do I lvreduce from the
> beginning of the LV?  Is that possible?

Actually, judging by the error, I think that this error is in the layout
of the journal itself instead of a disk error.  If it was a disk error
you would also be getting IDE errors, and badblocks would detect it.
The "bad block at offset" message happens when it is doing a bmap on the
journal, and hasn't even started the read.

I would suggest just removing the journal (tune2fs -O^has_journal <LV>) and
then re-creating it (tune2fs -j <LV>) and the problem should go away.

Cheers, Andreas

> On Sun, Feb 24, 2002 at 12:01:43AM -0700, Andreas Dilger wrote:
> > On Feb 23, 2002  16:45 -0500, Andres Salomon wrote:
> > > I've got a LV that keeps corrupting, made up of several IDE disks.  I've
> > > already discovered one of the drives to be flaking out, after various
> > > read tests on the device gave BadCRC/IRQ timeout errors.  Read tests on
> > > the other drives succeeded; however, I'm still getting stuff like:
> > > 
> > > journal_bmap: journal block not found at offset 7180 on lvm(58,0)
> > > 
> > > and
> > > 
> > > /dev/site/lvol1: recovering journal
> > > JFS: bad block at offset 7182
Andreas Dilger

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