Al Sparks spake the following on 5/2/2007 6:59 PM:
> 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
LVM even warned you --IN CAPS-- "THIS MAY DESTROY YOUR DATA".
I guess it was right. I haven't had much luck with reducing a volume below its
initial size. I usually make a new LV and rsync or cp -a the data over to it.
I try to leave some free space just for this. Or add a drive temporarily.
--
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