Mailinglist Archive: packet-writing (16 mails)

["O.Sezer" <sezero@xxxxxxxxxxxxxxx>]

Chris Pickett wrote:
> Hi,
>
> I have a 700 Mb CD-R that I wrote with IBM's DLA software a couple of
> years ago in Windows 2000.  For one reason or another, the disc is
> unreadable; I don't remember a power failure or premature ejection.
> At the time I tried to let the IBM stuff finalize the disc, but it was
> never able to, and just hung.  I think I tried a couple of shareware
> things at the time to see if it could be read at all but never made
> any progress.  Strangely I can read all of the other discs written
> with the same tool.
>
> Now I no longer have a CD-RW drive in my computer.  I do have a CD-RW
> in an iBook G4, but it won't even keep the disc in, it just spits it
> out after trying to mount it.  I would like to try and recover the
> files using my Thinkpad SD-C2302 CD-R/DVD drive.
>
> I have Gentoo installed, with the 2.6.5 gentoo-dev kernel, patched
> with the final April 13th 2.6.5 patch at
>
> http://w1.894.telia.com/~u89404340/patches/packet/2.6/packet-2.6.5.patch.bz2
>
> I compiled in support for the packet block device and also the UDF
> filesystem, and /dev/pktcdvd0 exists (so do pktcdvd[1..7]), and so
> does /dev/pktcd0, with major device number 97, minor 0 (or 1..7 for the others).
>
> I also have mkudffs, pktsetup, and cdrwtool installed.
>
> I noticed some instructions about extra parameters in
> /usr/src/linux/Documentation/filesystems/udf.txt, but I'm not sure how I specify
> these.  Anyway:
>
> # pktsetup /dev/pktcdvd0 /dev/hdc
>
> (( from dmesg ))
> Apr 16 02:18:50 miumiu hdc: packet command error: status=0x51 { DriveReady SeekComplete Error }
> Apr 16 02:18:50 miumiu hdc: packet command error: error=0x30
> Apr 16 02:18:50 miumiu ATAPI device hdc:
> Apr 16 02:18:50 miumiu Error: Medium error -- (Sense key=0x03)
> Apr 16 02:18:50 miumiu (reserved error code) -- (asc=0x57, ascq=0x00)
> Apr 16 02:18:50 miumiu The failed "Read Cd/Dvd Capacity" packet command was:
> Apr 16 02:18:50 miumiu "25 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "
> Apr 16 02:18:50 miumiu cdrom: This disc doesn't have any tracks I recognize!
> Apr 16 02:18:50 miumiu pktcdvd: writer 0 mapped to hdc
>
> # mount -t udf /dev/pktcdvd0 /mnt
> mount: /dev/pktcdvd0: can't read superblock
>
> (( no output in dmesg for the mount ))
>
> Also the same message for /dev/pktcd0 -- which I think I created
> myself -- and it doesn't matter if I specify the filesystem type as
> udf or iso9660 -- I think once these CD's are finalized they appear
> like iso9660's so that's why I tried that; that is probably gibberish
> mind you.
>
> # pktsetup -d /dev/pktcdvd0
>
> (( from dmesg ))
> Apr 16 02:26:01 miumiu pktcdvd: writer 0 unmapped
>
> So ........... do you think there's any hope for me, what else can I
> try, and what is the exact sequence / magic dance to specify these
> recovery parameters (I'm using grub, if they're boot-time parameters;
> otherwise I need to know how to specify them at module load time and
> if it would even make a difference in the first place to have these
> things compiled as modules)?  Apologies for any newbieness; it's my
> first real linux installation.
>
> Cheers,
> Chris
>
> P.S.  Please CC replies, in case I unsubscribe in the future and then
> somebody writes me a response.

If I understood correctly, this has nothing to do with pktcdvd which
presents writing ability to cdrws; but you suffer from read failures,
no?  In order to read and recover your data, you should try doing a
# mount -t udf /dev/hdc /mnt/somewhere
If it mounts then it mounts, if not then you have problems and chances
are that it might not be recoverable based on past experience :(
I don't know what those ibm dla stuff are, so are you sure it is udf?
You may want to try without the -t udf option again..

Regards;
Özkan Sezer