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Date:      Tue, 6 Jan 2004 16:05:03 -0500
From:      Fabrizio Parrella <fabrizio@nldesign.com>
To:        Bruce Evans <bde@zeta.org.au>
Cc:        current@freebsd.org
Subject:   Re: mount / umount
Message-ID:  <200401061605.03319.fabrizio@nldesign.com>
In-Reply-To: <20040107074011.D5599@gamplex.bde.org>
References:  <200401061059.54892.fabrizio@nldesign.com> <20040107074011.D5599@gamplex.bde.org>

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This mean that will be not possible mount a floppy disk with some files in?=
 or=20
a CDROM with some files?

fabry

On Tuesday 06 January 2004 03:44 pm, Bruce Evans wrote:
> On Tue, 6 Jan 2004, Fabrizio Parrella wrote:
> > I mount a msdos floppy disk with:
> >
> > mount -tmsdos /dev/fd0 /mnt/floppy
> >
> > and everything works fine..
> > when I tried to umount, I got this:
> >
> > umount: unmount of /mnt/floppy failed: Resourde temporary =A0unavailable
> > # fd0: hard error cmd=3Dwrite fsbn 19 (ST0 40<abnrml> ST1 2<write_prote=
ct>
> > ST2 0 cyl 0 hd 1 sec 2
>
> It's not writable, so you need to mount it with option ro.
>
> msdosfs used to have the nice property of not scribbling on disks unless
> there is a write() or chmod() etc. on the disk, but it now always writes
> to the FAT for non-ro mounts to clear the clean flag.
>
> > PLUS, if I try to mount the floppy disk by an user and not as root, I g=
et
> > thie message:
> >
> > msdosfs: /dev/fd0: Operation not permitted
>
> Various things prevent user mounts (see another reply), and non-clean
> disks should now prevent read-write mounting.  I'm not sure if this works
> yet.
>
> Bruce
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