cannot find directory on cdrom

cannot find directory on cdrom

[Richard Polton]

Hi,

I have a cdrom burnt by a friend with W2000 (I know, friends don't let
friends use W ;-) which has (at least) one directory on it which I
cannot
see when mounting the disk under linux. I am using kernel 2.4.4 and
the mount command is the usual

mount /dev/cdrom /mnt/cdrom -t iso9660

I have Joliet compiled into the kernel too. I can send by private email
the
first 120 blocks or so of the disk if anyone is interested. I looked at
this
with hexlify and can see the mysterious directory (s?) which is called
'sturf'.

Thanks,

Richard

P.S. Incidentally, there is an undefined symbol in video/media/buz.c --
KMALLOC_MAXSIZE, which I found by accidentally trying to build this
module even though I do not have the requisite hardware 8-)

Re: cannot find directory on cdrom

[Andreas Mohr]

On Thu, May 03, 2001 at 08:29:02AM +0100, Richard Polton wrote:
> Hi,
> 
> I have a cdrom burnt by a friend with W2000 (I know, friends don't let
> friends use W ;-) which has (at least) one directory on it which I
> cannot
> see when mounting the disk under linux. I am using kernel 2.4.4 and
> the mount command is the usual
> 
> mount /dev/cdrom /mnt/cdrom -t iso9660
> 
> I have Joliet compiled into the kernel too. I can send by private email
> the
> first 120 blocks or so of the disk if anyone is interested. I looked at
> this
> with hexlify and can see the mysterious directory (s?) which is called
> 'sturf'.
> 
> Thanks,
> 
> Richard
Hmm, is this the old "non-standard sector alignment" problem ?
Some CDs have their directory sector entries exceed the sector, and AFAIK
the problem is that they exceed it not entry by entry,
but in the middle of a directory entry, which violates the ISO9660 spec.
The Linux CD-ROM driver used to have a workaround for this,
but then after 2.0.x it seems to have been removed.

Why ???

After all Windows perfectly accepts these broken (ISO9660 wise) CD-ROMs.

I don't know whether 2.4.x still has the same "feature" that 2.2.x had.

A Spanish language training CD of mine has this problem, and I can't read
several files on it.

Hmm, or maybe your problem is simply that you forgot to enable the
"hidden" mount option for your CD-ROM ??
(some files are burnt with "hidden" attribute !)

Andreas Mohr

Re: cannot find directory on cdrom

[Erik Mouw]

On Thu, May 03, 2001 at 08:29:02AM +0100, Richard Polton wrote:
> I have a cdrom burnt by a friend with W2000 (I know, friends don't let
> friends use W ;-) which has (at least) one directory on it which I cannot
> see when mounting the disk under linux. I am using kernel 2.4.4 and
> the mount command is the usual
> 
> mount /dev/cdrom /mnt/cdrom -t iso9660
> 
> I have Joliet compiled into the kernel too. I can send by private email the
> first 120 blocks or so of the disk if anyone is interested. I looked at this
> with hexlify and can see the mysterious directory (s?) which is called
> 'sturf'.

Try to mount the CDROM with the option -onojoliet and see if that
helps. It once solved the problem for me, YMMV. See man mount for more
iso9660 mount options.


Erik

-- 
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031,  2600 GA Delft, The Netherlands
Phone: +31-15-2783635  Fax: +31-15-2781843  Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/