Re: [Xen-users] what's correct way of shrinking LVM based domU?

[John Haxby <john.haxby@xxxxxxxxxx>]

Rudi Ahlers wrote:
> Jean Charles Delepine wrote:
> > Rudi Ahlers <Rudi@xxxxxxxxxxx> écrivait (wrote) :
> >
> >  
> > > This is what I have:
> > >
> > > [root@cPanel002 ~]# [root@HF-LINSRV01 ~]# lvscan
> > >  ACTIVE            '/dev/data/cpanel002' [100.00 GB] inherit
> > >  ACTIVE            '/dev/data/windows2003_web' [30.00 GB] inherit
> > >  ACTIVE            '/dev/data/storage' [50.00 GB] inherit
> > >  ACTIVE            '/dev/data/cacti' [20.00 GB] inherit
> > >  ACTIVE            '/dev/data/cpanel2' [30.00 GB] inherit
> > >  ACTIVE            '/dev/system/root' [39.06 GB] inherit
> > >  ACTIVE            '/dev/system/swap' [9.75 GB] inherit
> > >
> > >
> > > I need to resize the 100GB /dev/data/cpanel002
> > >     
> > 1) shutdown the domu : xm shutdown 'name of domu'
> >    wait for the domu to be shutdown  (xm list)
> > 2) reduce the filesystem :    If it's ext3 :
> >       e2fsck -f -y /dev/data/cpanel00
> >       resize2fs -p /dev/data/cpanel00 90G
> > 3) reduce the logical volume :
> >       lvreduce -L 90G /dev/data/cpanel00
> >
> > 4) restart the domu.
> >
> >               Jean Charles
> >   
> I don't think those commands will work on ext3
>
> [root@HF-LINSRV01 i386]# e2fsck -f -y /dev/data/cpanel002
> e2fsck 1.39 (29-May-2006)
> Couldn't find ext2 superblock, trying backup blocks...
> e2fsck: Bad magic number in super-block while trying to open 
> /dev/data/cpanel002
> The superblock could not be read or does not describe a correct ext2
> filesystem.  If the device is valid and it really contains an ext2
> filesystem (and not swap or ufs or something else), then the superblock
> is corrupt, and you might try running e2fsck with an alternate 
> superblock:
>    e2fsck -b 8193 <device>
That's because /dev/data/cpanel002 isn't a file system, it's a disk 
image.  Run "kpartx /dev/data/cpanel002" to see what partitions there are.
jch


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