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

[Joel Soete]

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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