DVD-R, problem reading files beyond 4 GB position

vimico · 05-25-2006, 06:50 PM

I've burned a data DVD-R with K3B. K3B did verify it successfully.
I haven't used the entire capacity (4.3 GB), there were approx. 250 MB to spare.
The DVD can be mounted, but the files that have been written last, are not readable under Linux. (This is a dual boot machine, and the files in question are readable with Windows)

Apparently there is an upper limit, and any attempt to read beyond that fails.

Can the limit be changed? Or is it determined automatically? Why can K3B read these sectors but not the "normal" OS?

/var/log/messages

Code:

May 23 01:18:16 localhost kernel: [4298007.805000] hdc: rw=0, want=8475852, limit=8388604
May 23 01:18:16 localhost kernel: [4298007.805000] attempt to access beyond end of device
May 23 01:18:16 localhost kernel: [4298007.805000] hdc: rw=0, want=8475856, limit=8388604
May 23 01:18:16 localhost kernel: [4298007.805000] attempt to access beyond end of device
May 23 01:18:16 localhost kernel: [4298007.805000] hdc: rw=0, want=8475860, limit=8388604
May 23 01:18:16 localhost kernel: [4298007.805000] attempt to access beyond end of device
May 23 01:18:16 localhost kernel: [4298007.805000] hdc: rw=0, want=8475800, limit=8388604
May 23 01:18:16 localhost kernel: [4298007.805000] attempt to access beyond end of device
May 23 01:18:16 localhost kernel: [4298007.805000] hdc: rw=0, want=8475804, limit=8388604

hdparm -v -i /dev/dvd

Code:

/dev/dvd:
 IO_support   =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument

 Model=HL-DT-ST DVDRAM GSA-4160B, FwRev=A300, SerialNo=XXXXXXXXX
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2 udma3 udma4
 AdvancedPM=no
 Drive conforms to: Unspecified:  ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5

 * signifies the current active mode

tico0z · 05-26-2006, 07:26 PM

I had the same problem.
I thought I had heard something about a 2.6 kernel hack for this somewhere, but that was some time back.
Did you try a
# dd if=/dev/what-have-you of=dvd_image.iso
??
I tried this on my DVD-ROM and that didn't work, but from the DVDRW it did.

RGummi · 01-29-2007, 02:41 AM

Hi,

I have the same problem with Suse 10.2 (64 bit)!

Jan 28 11:39:45 linux kernel: attempt to access beyond end of device
Jan 28 11:39:45 linux kernel: hda: rw=0, want=8388624, limit=8388604
Jan 28 11:39:45 linux kernel: Buffer I/O error on device hda, logical
block 2097155

Any solution???

R

kodifik · 04-07-2007, 05:12 AM

The cause of this problem is brilliantly discussed in detail in:
http://lkml.org/lkml/2006/11/23/182
To sum up, when something has previously tried to open the cdrom, it can cause the kernel to stay locked on the wrong assumptions about the device (i.e. its maximum size).
Usually, that something is the pktsetup instruction, as described in:
http://lists.opensuse.org/archive/pa.../msg00022.html
In Debain, all one has to do is:
/etc/init.d/udftools stop
for everything to return to work fine.
Chances are this will repair also the message "inappropiate ioctl for device" if that happens to you when using the eject command.

kodifik · 04-07-2007, 05:41 AM

I forgot to make clear that, whenever you want to use packet writing again, you will have to execute:
/etc/init.d/udftools start
(in Debian). Remember to stop it when you are finished, or the "beyond end of device" could happen again.