Re: 2.6.20-rc6 libata PATA ATAPI CDROM is not working

From: Joel Soete
Date: Sat Feb 17 2007 - 05:58:48 EST


Hello Tejun,

Sorry for delay but I was a bit busy this week.

Tejun Heo wrote:
Hello, Joel.

Joel Soete wrote:
A small update:
your patch also works against 2.6.20

Glad to hear that.

but seems that open the door to numerous other pb:
1/ pb to burn cd:
# md5sum cd060213.iso
6a1248783a21722816b972aa9bae9d5e cd060213.iso

# ll cd060213.iso
-rwxr-xr-x 1 root root 3213312 Feb 13 2006 cd060213.iso

# dd if=/dev/sr0 bs=1 count=3213312 | md5sum
dd: reading `/dev/sr0': Input/output error
0337e9846d17779945c5c252d4f897f0 -
3129344+0 records in
3129344+0 records out
3129344 bytes (3.1 MB) copied, 36.6963 seconds, 85.3 kB/s

eventhought cdrecord seems to be successfull???

Hmm... 82K difference. Can you burn an iso and md5sum the files contained in the image and burned cd?

Ok comparing the content of the original image:
# mount -t iso9660 -o ro -o loop /MultiCd/cd060213.iso /mnt/cd
# find /mnt/cd -type f -exec md5sum {} \;
37149d4961c0484f2cceb1a1614b253d /mnt/cd/boot.cat
4ab996554b0e7ade115a3f284b876612 /mnt/cd/boot.msg
fbdc51c29d54dd227427b2ef90e1961e /mnt/cd/initrd.cgz
92c9a50bed71257c29f069ec5dd819fc /mnt/cd/isolinux.bin
927ce1096693b3a44af0e0d8a2ad720c /mnt/cd/isolinux.cfg
4afcf65ff8259a3bccd0cf9f91675529 /mnt/cd/scsi.cgz
4714742585da795c3a69c262ce8c35ef /mnt/cd/vmlinuz

and the content of the burned cd:
# mount /cdrom
# find /cdrom -type f -exec md5sum {} \;
37149d4961c0484f2cceb1a1614b253d /cdrom/boot.cat
4ab996554b0e7ade115a3f284b876612 /cdrom/boot.msg
fbdc51c29d54dd227427b2ef90e1961e /cdrom/initrd.cgz
92c9a50bed71257c29f069ec5dd819fc /cdrom/isolinux.bin
927ce1096693b3a44af0e0d8a2ad720c /cdrom/isolinux.cfg
4afcf65ff8259a3bccd0cf9f91675529 /cdrom/scsi.cgz
4714742585da795c3a69c262ce8c35ef /cdrom/vmlinuz

it seems ok?

What is it lost???


2/ (but that should be much more related to scsi api) sdcXX > sdc15 doesn't works ;-(
# sfdisk -l /dev/sdc

Disk /dev/sdc: 1826 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdc1 * 0+ 195 196- 1574338+ b W95 FAT32
/dev/sdc2 196 1825 1630 13092975 5 Extended
[snip]
/dev/sdc23 881+ 1533 653- 5245191 83 Linux
/dev/sdc24 1795 1825 31 249007+ 83 Linux

Whee, you have 24 partitions?
yes: it was dated from the early time I was testing various distro to choose one ;-)

Due to the way SCSI block device numbers are laid out, SCSI supports only upto 15 partitions per device.

Ah, I never had chance to use a disk array with fc connection on one of my linux boxe, so I don't know how can it works with up to 255 luns?

Thanks again,
Joel
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