mount shows dm-* instead og dev/mapper/*

[Karel Zak]

  We need to backport

          commit 4271e23942bdc60e1fa6c0b26bc666a94a8b3e1d
          Author: Karel Zak <kzak at redhat.com>
          Date:   Mon Apr 27 15:00:57 2009 +0200

          blkid: use /dev/mapper/<name> rather than /dev/dm-<N>

 upstream patch to Fedora.

    Karel

On Sat, Jun 13, 2009 at 01:48:17AM +0200, Laurent Jacquot wrote:
> Hello,
> I forgot to give my conf.
> I run a fully updated fedora 10
> 
> [root at jack ~]# uname -a
> Linux jack.lutty.net 2.6.27.24-170.2.68.fc10.i686 #1 SMP Wed May 20
> 23:10:16 EDT 2009 i686 i686 i386 GNU/Linu
> 
> If nobody has a clue about that, I will bug Zilla, probably under
> device-mapper-1.02.27-7.fc10.i386
> 
> regards,
> laurent
> 
> 
> Le jeudi 11 juin 2009 à 23:32 +0200, Laurent Jacquot a écrit :
> > Hello,
> > I recently upgraded my raid array from 4 to 5 disks,
> > and mount no longer shows lv names but is /dev/dm-* style instead.
> > My setup is lvm on softraid
> > 
> > blkid, cat /proc/mounts, df, etc.. are all affected
> > 
> > How can I recover the normal behavior? Is it really caused by my
> > upgrade?
> > I recreated /etc/blkid, /etc/lvm/.cache.
> > I straced blkid (with no cache): it reads directly the data
> > from /proc/partitions.
> > 
> > cat /proc/partitions shows (edited for simplicity)
> > major minor  #blocks  name
> > 
> >    8     0  390711384 sda
> >    8     1    1020096 sda1
> >    8    16  390711384 sdb
> >    8    17    1020096 sdb1
> >    8    32  195360984 sdc
> >    8    33          1 sdc1
> >    8    48  195360984 sdd
> >    8    49          1 sdd1
> >    8    64  976762584 sde
> >    8    65          1 sde1
> >    9     1   78171648 md1
> >  253     0    2064384 dm-0
> >  253     1    2064384 dm-1
> >  253     2   10485760 dm-2
> >  253     3   12484608 dm-3
> >  253     4    4194304 dm-4
> >    9     2   78171904 md2
> >    9     0    1020032 md0
> >    9     3   78171904 md3
> >  253     5  136314880 dm-5
> >  253     6   62914560 dm-6
> >  253     7   37748736 dm-7
> >  253     8   31457280 dm-8
> >  253     9   20971520 dm-9
> > 
> > 
> > Should I file a bug? And if so, to which component
> > 
> > example of output:
> >  Filesystem            Size  Used Avail Use% Mounted on
> >  /dev/dm-0             2.0G  505M  1.4G  27% /
> >  /dev/md0              981M   40M  891M   5% /boot
> >  /dev/dm-2             9.9G  5.8G  3.7G  62% /usr
> >  /dev/dm-1             2.0G   38M  1.9G   2% /tmp
> >  /dev/dm-3              12G  994M   11G   9% /var
> >  /dev/dm-16             20G   12G  6.8G  64% /var/www/html
> >  /dev/dm-15             36G  3.6G   32G  11% /home
> >  /dev/dm-17             60G   38G   19G  67% /home/alex/Images
> >  /dev/dm-18             20G   15G  3.9G  80% /home/alex/Mp3
> >  /dev/dm-19             25G   21G  2.5G  90% /home/alex/vmware
> >  /dev/dm-11             20G   13G  6.7G  65% /backup/www
> >  /dev/dm-7              36G  3.6G   31G  11% /backup/home
> >  /dev/dm-6              60G   38G   19G  68% /backup/Images
> >  /dev/dm-9              20G   15G  3.8G  81% /backup/Mp3
> >  /dev/dm-10             25G  173M   24G   1% /backup/vmware
> > 
> > instead of
> > Filesystem            Size  Used Avail Use% Mounted on
> >  /dev/mapper/rootvg-rootlv
> >                        2.0G  505M  1.4G  27% /
> >  /dev/md0              981M   40M  891M   5% /boot
> >  /dev/mapper/rootvg-usrlv
> >                        9.9G  5.8G  3.7G  62% /usr
> >  /dev/mapper/rootvg-tmplv
> >                        2.0G   38M  1.9G   2% /tmp
> >  /dev/mapper/rootvg-varlv
> >                         12G  936M   11G   9% /var
> >  /dev/mapper/datavg-wwwlv
> >                         20G   12G  6.8G  64% /var/www/html
> >  /dev/mapper/datavg-homelv
> >                         36G  3.5G   32G  10% /home
> >  /dev/mapper/datavg-Imageslv
> >                         60G   38G   19G  67% /home/alex/Images
> >  /dev/mapper/datavg-mp3lv
> >                         20G   15G  3.9G  80% /home/alex/Mp3
> >  /dev/mapper/datavg-vmwarelv
> >                         25G   21G  3.4G  86% /home/alex/vmware
> >  /dev/mapper/sauv2vg-mp3lv
> >                         20G   15G  3.8G  81% /backup/Mp3
> > 
> > Thank you in advance,
> > Laurent
> > 
> > 
> 
> 
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-- 
 Karel Zak  <kzak at redhat.com>