Re: [gentoo-user] Can't extend an LVM2 volume

[Alan McKinnon]

On Tuesday 13 January 2009 20:58:40 John J. Foster wrote:
> On Tue, Jan 13, 2009 at 08:44:38PM +0200, Alan McKinnon wrote:
> > On Tuesday 13 January 2009 20:31:33 John J. Foster wrote:
> > > In trying to extend a volume I get the following error:
> > >
> > > mockingbird ~ # lvextend -v -L400G /dev/vg00/data
> > >     Finding volume group vg00
> > >     Archiving volume group "vg00" metadata (seqno 22).
> > >   Extending logical volume data to 400.00 GB
> > >     Creating volume group backup "/etc/lvm/backup/vg00" (seqno 23).
> > >     Found volume group "vg00"
> > >     Found volume group "vg00"
> > >     Loading vg00-data table
> > >   device-mapper: reload ioctl failed: Invalid argument
> > >   Failed to suspend data
> > >
> > > The following show in /var/log/messages:
> > >
> > > Jan 13 11:23:30 mockingbird device-mapper: table: device 8:5 too small
> > > for target
> >
> > You are trying to create an lv that is bigger than the maximum
> >
> > Despite the fact that pvdisplay says you have 415GB unallocated space,
> > you cannot make a 400G volume as lvm wants more than 15G for metadata.
> > Looking at the existing usage, it is using around 5% for this.
> >
> > Try using the -l option to lvextend and specifying a number of extents
> > instead of space usage.
>
> Thanks Alan, but that didn't do the trick. Even if I try to only make it
> 200GB, same problem.
>
> mockingbird ~ # lvextend -v -l100000 /dev/vg00/data
>     Finding volume group vg00
>     Archiving volume group "vg00" metadata (seqno 22).
>   Extending logical volume data to 390.62 GB
>     Creating volume group backup "/etc/lvm/backup/vg00" (seqno 23).
>     Found volume group "vg00"
>     Found volume group "vg00"
>     Loading vg00-data table
>   device-mapper: reload ioctl failed: Invalid argument
>   Failed to suspend data
> mockingbird ~ # lvextend -v -L200G /dev/vg00/data
>     Finding volume group vg00
>     Archiving volume group "vg00" metadata (seqno 22).
>   Extending logical volume data to 200.00 GB
>     Creating volume group backup "/etc/lvm/backup/vg00" (seqno 23).
>     Found volume group "vg00"
>     Found volume group "vg00"
>     Loading vg00-data table
>   device-mapper: reload ioctl failed: Invalid argument
>   Failed to suspend data

You could try this wiki FAQ:

http://sources.redhat.com/lvm2/wiki/FrequentlyAskedQuestions

Also have a look at the physical device the pv lives on. Do the device size 
and the pv data about it's size match?


-- 
alan dot mckinnon at gmail dot com