On Wed, May 02, 2007 at 06:59:26PM -0700, Al Sparks enlightened us:
> I'm new to lvm. I decided to decrease the space of a logical volume.
> So I did a:
> $ df -m
> Filesystem 1M-blocks Used Available Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
> 1953 251 1602 14% /
> /dev/sda2 494 21 448 5% /boot
> tmpfs 1014 0 1014 0% /dev/shm
> /dev/mapper/VolGroup00-LogVol05
> 48481 6685 39295 15% /home
> /dev/mapper/VolGroup00-LogVol03
> 961 18 894 2% /tmp
> /dev/mapper/VolGroup00-LogVol01
> 7781 2051 5329 28% /usr
> /dev/mapper/VolGroup00-LogVol02
> 5239 327 4642 7% /var
>
>
>
> $ sudo lvm lvreduce -L -1000M /dev/VolGroup00/LogVol05
> Rounding up size to full physical extent 992.00 MB
> WARNING: Reducing active and open logical volume to 47.91 GB
> THIS MAY DESTROY YOUR DATA (filesystem etc.)
> Do you really want to reduce LogVol05? [y/n]: y
> Reducing logical volume LogVol05 to 47.91 GB
> Logical volume LogVol05 successfully resized
>
>
> $ df -m
> Filesystem 1M-blocks Used Available Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
> 1953 251 1602 14% /
> /dev/sda2 494 21 448 5% /boot
> tmpfs 1014 0 1014 0% /dev/shm
> /dev/mapper/VolGroup00-LogVol05
> 48481 6685 39295 15% /home
> /dev/mapper/VolGroup00-LogVol03
> 961 18 894 2% /tmp
> /dev/mapper/VolGroup00-LogVol01
> 7781 2051 5329 28% /usr
> /dev/mapper/VolGroup00-LogVol02
> 5239 327 4642 7% /var
>
> Note that "df" shows the same size available. This probably means
> that the 2 "systems" aren't talking to each other (or my lvm command
> failed).
>
> When I rebooted, things failed, going into "repair filesystem" mode.
> I tried
> fsck /dev/VolGroup00/LogVol05
>
> but after awhile, it started giving block errors, specifically
> "Error reading block <block-number> (Invalid argument) while doing inode scan. Ignore error<y>?
>
> I held down the <Enter> key for awhile in hopes that I'd be able to
> get through the errors, but no joy. I finally cancelled the thing.
>
> I can rebuild the server, it's no big deal. In fact the logical
> volume that went bad isn't a big deal data wise, and I shouldn't need
> that data to bring up the server itself. I shouldn't need to mount
> it. So can I still save this?
Did you resize the filesystem, too?
Matt
--
Matt Hyclak
Department of Mathematics
Department of Social Work
Ohio University
(740) 593-1263
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