On Thu, May 3, 2007 2:06 am, Al Sparks wrote:
--- Matt Hyclak hyclak@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
Take a look at http://tldp.org/HOWTO/LVM-HOWTO/ . Lots of good examples.