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

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] can't mount vfat fs on lvm created by winxp guest
From: Yann Boutin <yann.boutin@xxxxxxx>
Date: Sat, 28 Apr 2007 12:45:18 +0200
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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.


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