CD-ROM I/O error

Hello,

when I do 'cat /dev/cdrom > disc.iso' on my Itanium box, I/O error happens on CD-ROM.

| hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
| hda: cdrom_decode_status: error=0x30
| hda: ATAPI reset complete
| end_request: I/O error, dev 03:00 (hda), sector 1322520
| hda: irq timeout: status=0xd0 { Busy }
| hda: ATAPI reset complete

With the same CD, I/O error does not happen on my Pentium machine.

I'm trying 2.4.17 and 2.4.18. Both results in same error. Has anyone experienced a problem like this?

Best regards.
--
NOMURA, Jun'ichi <[email protected], [email protected]> HPC Operating System Group, 1st Computers Software Division, Computers Software Operations Unit, NEC Solutions.

If you're trying to simply make an ISO with the right number of sectors, you need to use 'isoinfo' to avoid these kinds of end-of-disc problems. Something like (yes I use this quite often):

[mdomsch@humbolt mdomsch]$ more ~/check_cds
#!/bin/sh

CD=0

while [ 1 ]; do
CD=expr $CD + 1
echo "Insert CD #$CD. What shall I name it?"
read CDNAME
SIZE=`isoinfo -d -i /dev/cdrom | grep "Volume size is: " | awk '{print
$4}'`
dd if=/dev/cdrom bs=2k count=$SIZE of=$CDNAME
mount /mnt/cdrom
ls -lR /mnt/cdrom
umount /mnt/cdrom
done

Thanks,
Matt

--
Matt Domsch
Sr. Software Engineer
Dell Linux Solutions www.dell.com/linux
Dell internal Linux lists @ http://insidelists.us.dell.com
Dell public Linux lists @ http://lists.us.dell.com
#1 US Linux Server provider for 2001 and Q1/2002! (IDC May 2002)

Hi,

Thank you, Matt.
I had to specify the number of blocks to read.

I'm still wondering why this does neither occur on my Pentium box nor for some other CDs..

Best regards.
--
NOMURA, Jun'ichi <[email protected], [email protected]> HPC Operating System Group, 1st Computers Software Division, Computers Software Operations Unit, NEC Solutions.