file system weirdness in lvm

[Justin Conover]

On 7/9/07, Chuck Ebbert <cebbert at redhat.com> wrote:
>
> On 07/09/2007 10:15 AM, Justin Conover wrote:
> > On 7/7/07, Justin Conover <justin.conover at gmail.com> wrote:
> >>
> >> I just noticed something on my desktop running F7.
> >>
> >> /usr was at 100%, then I noticed /usr/local was also at 100%, both
> being
> >> different lvm/fs.  Some how both are the same size and file up at the
> >> same
> >> time.....  extend one of them and the other grows....whats up with
> this?
> >>
> >> Example, I'll add some space to /usr
> >>
> >>
> >> [root at echelon ~]# df -h /usr /usr/local/
> >> Filesystem            Size  Used Avail Use% Mounted on
> >> /dev/mapper/rootvg-usrlv
> >>                       9.7G  7.4G   1.9G  80% /usr
> >> /dev/mapper/rootvg-locallv
> >>                       9.7G  7.4G  1.9G  80% /usr/local
> >> # ls -l /dev/mapper/
> >> total 0
> >> crw------- 1 root root  10, 63 2007-07-07 04:35 control
> >> brw-rw---- 1 root disk 253,  4 2007-07-07 09:35 rootvg-homelv
> >> brw-rw---- 1 root disk 253,  3 2007-07-07 09:35 rootvg-locallv
> >> brw-rw---- 1 root disk 253,  2 2007-07-07 09:35 rootvg-optlv
> >> brw-rw---- 1 root disk 253,  0 2007-07-07 09:35 rootvg-rootlv
> >> brw-rw---- 1 root disk 253,  7 2007-07-07 04:35 rootvg-swaplv
> >> brw-rw---- 1 root disk 253,  5 2007-07-07 09:35 rootvg-tmplv
> >> brw-rw---- 1 root disk 253,  6 2007-07-07 09:35 rootvg-usrlv
> >> brw-rw---- 1 root disk 253,  1 2007-07-07 09:35 rootvg-varlv
> >>
> >> # ls -l /dev/rootvg/
> >> total 0
> >> lrwxrwxrwx 1 root root 25 2007-07-07 04:35 homelv ->
> >> /dev/mapper/rootvg-homelv
> >> lrwxrwxrwx 1 root root 26 2007-07-07 04:35 locallv ->
> >> /dev/mapper/rootvg-locallv
> >> lrwxrwxrwx 1 root root 24 2007-07-07 04:35 optlv ->
> >> /dev/mapper/rootvg-optlv
> >> lrwxrwxrwx 1 root root 25 2007-07-07 04:35 rootlv ->
> >> /dev/mapper/rootvg-rootlv
> >> lrwxrwxrwx 1 root root 25 2007-07-07 04:35 swaplv ->
> >> /dev/mapper/rootvg-swaplv
> >> lrwxrwxrwx 1 root root 24 2007-07-07 04:35 tmplv ->
> >> /dev/mapper/rootvg-tmplv
> >> lrwxrwxrwx 1 root root 24 2007-07-07 09:38 usrlv ->
> >> /dev/mapper/rootvg-usrlv
> >> lrwxrwxrwx 1 root root 24 2007-07-07 04:35 varlv ->
> >> /dev/mapper/rootvg-varlv
> >>
> >> [root at echelon ~]# lvextend -L+1G /dev/rootvg/usrlv
> >>   Extending logical volume usrlv to 11.00 GB
> >>   Logical volume usrlv successfully resized
> >>
> >> [root at echelon ~]# resize2fs /dev/rootvg/usrlv
> >> resize2fs 1.39 (29-May-2006)
> >> Filesystem at /dev/rootvg/usrlv is mounted on /usr; on-line resizing
> >> required
> >> Performing an on-line resize of /dev/rootvg/usrlv to 2883584 (4k)
> blocks.
> >> The filesystem on /dev/rootvg/usrlv is now 2883584 blocks long.
> >>
> >> And the WHAT?  Compare this to the first one at 9.7G
> >>
> >> [root at echelon ~]# df -h /usr /usr/local/
> >> Filesystem            Size  Used Avail Use% Mounted on
> >> /dev/mapper/rootvg-usrlv
> >>                        11G  7.4G  2.8G  73% /usr
> >> /dev/mapper/rootvg-locallv
> >>                        11G  7.4G  2.8G  73% /usr/local
> >>
> >> This tells me my box is on crack, outside of that, not sure what is
> going
> >> on here.
> >>
> >>
> > Interesting, my box at work is the same case.  It seems during install
> that
> > doing an LVM for a seperate /usr and /usr/local breaks......
> >
>
> It's mounting the filesystems in the wrong order, so /usr hides
> /usr/local.
> Whee...
>
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Do you know if a bug has been reported or a work around?  What tells them
the order to mount?

Thanks,
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