Re: [Xen-users] can't mount vfat fs on lvm created by winxp guest

[Yann Boutin <yann.boutin@xxxxxxx>]

On 12:45 Sat 28 Apr     , Yann Boutin wrote:
> On 11:34 Sat 28 Apr     , Nico Kadel-Garcia wrote:
> > Yann Boutin wrote:
> > >On 13:10 Sat 28 Apr     , Tim Post wrote:
> > >  
> > >>On Fri, 2007-04-27 at 23:02 +0200, Yann Boutin wrote:
> > >>    
> > >>>Greetings, 
> > >>>I've had no success with mounting a vfat file system created by a 
> > >>>Windows XP guest on a lvm volume.
> > >>>
> > >>># mount -t vfat /dev/vg1/win1 /mnt/
> > >>>      
> > >>This is also a common problem when sharing pen drives and similar
> > >>between Windows and GNU/Linux (or any other odd fat bd)
> > >>
> > >>try mount -t vfat -o umask=000 /dev/vg1/win1 /mnt
> > >>
> > >>If you go to the mount man page, it explains some things that can
> > >>'break' vfat, such as everything by default being mounted with the umask
> > >>of the current process.
> > >>
> > >>see man 8 mount and look for "Mount options for fat"
> > >>
> > >>You may need to play with this a bit. The above gets my pen drive
> > >>mounted correctly, may work for you.
> > >>
> > >>This is really a GNU/Linux admin issue, not so much Xen but I figured
> > >>I'd chirp in anyway since it is kinda cryptic.
> > >>    
> > >
> > >Ok I've tryed all things working for usb pen problems with no effect. So
> > >I investigate further:
> > >
> > >creating a new volume
> > ># lvcreate -n win3 -L6G vg1
> > >
> > >making a vfat fs on it
> > ># mkfs.vfat /dev/vg1/win3
> > >
> > >mounting it (successfully)
> > ># mount -v -t vfat /dev/vg1/win3 /mnt/
> > >/dev/mapper/vg1-win3 on /mnt type vfat (rw)
> > >
> > >launching Windows XP guest installation
> > ># xm create /etc/xen/winxp3.hvm
> > >
> > >At this point Windows Xp installer can't detect the partition type and
> > >report it as 'unknown'
> > >
> > >So Ok, let Windows installer (re)format it with fat32 fs and go ahead
> > >to finish installation. When installation ended I stop Windows
> > >Guest properly and try again to mount the guest vfat fs and, the same 
> > >error appends ...
> > >
> > ># mount -t vfat /dev/vg1/win3 /mnt/
> > >mount: wrong fs type, bad option, bad superblock on /dev/vg1/win3,
> > >       missing codepage or other error
> > >       In some cases useful info is found in syslog - try
> > >       dmesg | tail  or so
> > >
> > >
> > >Don't you thing the problem comes from the manner Windows XP guest handles 
> > >lvm volumes rather than from any missing codepage or file mode option when 
> > >mounting ?
> > >
> > >Anyone can report succes with mounting 'on lvm' vfat guest filesystem ?
> > >
> > >Thanks !
> > >
> > >   Yann.
> > >  
> > Windows XP created it? Are you *sure* it's a FAT32 or vfat compatible 
> > partition type, and not NTFS?
> 
> Yes I'm sure it's a fat32 fs.

And yes it's a FAT32 partition type :)

# fdisk -l /dev/vg1/win3

         Device Boot      Start         End      Blocks   Id  System
/dev/vg1/win3p1   *           1         782     6281383+   b  W95 FAT32


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