On Thu, May 3, 2007 2:06 am, Al Sparks wrote:
>
> --- Matt Hyclak <hyclak@xxxxxxxxxxxxxx> 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.
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