[CentOS] LVM Resizing Problem
Al Sparks
data345 at yahoo.com
Thu May 3 06:06:31 UTC 2007
--- Matt Hyclak <hyclak at math.ohiou.edu> wrote:
> 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
Nope. How do you do that?
=== Al
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