[linux-lvm] mapping blocks to PVs?

[Heinz J . Mauelshagen]

On Sun, Feb 24, 2002 at 05:58:32PM -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`

Yes.

> (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?

No, just from the end.

Regards,
Heinz    -- The LVM Guy --

> 
> 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
> > > 
> > > How can I figure out which PV is holding block 7180 and 7182?  
> > 
> > I think "lvdisplay -v" or "pvdisplay -v" or similar will show the _sector_
> > numbers for each PE.  Note that for ext3, the block numbers reported are
> > 4kB blocks (usually, check with dumpe2fs -h), so you are probably looking
> > for sectors 7180*8 and 7182*8.
> > 
> > Cheers, Andreas
> > --
> > Andreas Dilger
> > http://sourceforge.net/projects/ext2resize/
> > http://www-mddsp.enel.ucalgary.ca/People/adilger/
> > 
> > 
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm at sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> 
> -- 
> "I think a lot of the basis of the open source movement comes from
>   procrastinating students..."
> 	-- Andrew Tridgell <http://www.linux-mag.com/2001-07/tridgell_04.html>
> 
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*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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