[CentOS] Consolidating LVM volumes..

Fri Mar 23 14:52:08 UTC 2007
WipeOut <wipe_out at users.sourceforge.net>

Wojtek.Pilorz wrote:
> On Fri, 23 Mar 2007, Theo Band wrote:
> [...]
>> To my understanding sometimes it is possible to resize live ext3 
>> filesystems. (No experience myself). In that case you could simply do 
>> something like this:
>> resize2fs /dev/VolGroup00/VarVol00 2G
>> lvreduce -L2G /dev/VolGroup00/VarVol00
>> I would still prefer to do this when the disk is unmounted and checked 
>> (e2fsck -f /dev/VolGroup00/VarVol00). But in that case you of course get 
>> rid of the partition VarVol00 anyhow.
>> Theo
> Last time I tried reducing ext3 was only possible after
> umount and e2fsck -f;
> Enlarging ext3 was generally possible on mounted system, unless
> you want to enlarge past some limit (depending on how fs was created); in that case
> umount and e2fsck is also needed.
> Best regards,
> Wojtek

Everything I have read said that reducing an LVM volume was dangerous 
because you have to reduce the file system first and that has issues of 
its own..

I would rather just migrate the data off the one volume to another then 
all I have to do is extend the volumes which works fairly easily..