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    SubjectRe: unable to mount a CD - iso9660 bug?
    Date
    On Tuesday 17 August 2010 13:50:39 A. C. Censi wrote:
    > On Tue, Aug 17, 2010 at 7:08 AM, Ondrej Zary <linux@rainbow-software.org>
    wrote:
    > > On Tuesday 17 August 2010, Tao Ma wrote:
    > >> Hi Ondrej
    > >>
    > >> On 08/17/2010 12:50 AM, Ondrej Zary wrote:
    > >> > On Monday 16 August 2010 16:18:57 Ondrej Zary wrote:
    > >> >> On Monday 16 August 2010, Johannes Stezenbach wrote:
    > >> >>> On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
    > >> >>>> I have a CD that came with Samsung printer that Linux cannot mount
    > >> >>>> but works fine in Windows. The CD is physically OK - "dd" made ISO
    > >> >>>> image without any problems. This ISO image is unmountable too. When
    > >> >>>> I force the filesystem to iso9660, it mounts but no files are
    > >> >>>> visible:
    > >> >>>
    > >> >>> Maybe it's a multi-session disk where the first session is
    > >> >>> HFS with Apple software.  Try mounting with -t iso9660 -o session=1.
    > >> >>
    > >> >> Still the same - no files. dmesg contains:
    > >> >>
    > >> >> ISOFS: Invalid session number or type of track
    > >> >> ISOFS: Invalid session number
    > >> >> ISO 9660 Extensions: Microsoft Joliet Level 3
    > >> >> ISO 9660 Extensions: RRIP_1991A
    > >> >
    > >> > Here's the compressed ISO file if anyone wants to examine it:
    > >> > http://www.rainbow-software.org/linux_files/samsung-bad.rar
    > >>
    > >> what is your kernel version? I can mount it successfully in my el5 box
    > >> with kernel 2.6.35+.
    > >
    > > I have 2.6.35. Also tried it on another two machines with Debian Squeeze
    > > 2.6.32 and Lenny 2.6.26 with the same result (no files visible when
    > > mounted).
    > >
    > >
    > > --
    > > Ondrej Zary
    > > --
    > > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel"
    > > in the body of a message to majordomo@vger.kernel.org
    > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
    >
    > Try -unide mount option.
    >
    > If it does not work, try what is described in the last posts of this
    > thread: http://www.pubbs.net/200910/kernel/12764-iso9660-mount-problem.html

    Thanks. As Bodo Eggert said, "-o norock" helps.

    In fact, I've hit two "bugs":
    1. blkid is unable to recognize HFS+ISO9660 CD. Just tracked it down and fixed
    only to find that it was aleady fixed:
    http://git.kernel.org/?p=utils/util-linux-ng/util-linux-ng.git;a=commitdiff;h=791a2fd67c118c3f07141e4cc95532fe908015a9

    2. some kernel feature - when Rock Ridge is present on iso9660, it's preferred
    over Joliet. The CD contains both but seems that only Joliet has files
    inside? When it's mounted with "-o nojoliet,norock", it's empty too. Can we
    detect this case and avoid it somehow (switch to Joliet?)

    --
    Ondrej Zary
    --
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