Re: AHCI SATA DVD writing issue

["Konstantin A. Lepikhov" <lakostis@unsafe.ru>]

Hi Tejun!

Wednesday 02, at 09:22:51 AM you wrote:

> Hello, Davor.
> 
> davor emard wrote:
>> Here is capture of the syslog as you requested.
>> I have a LG on ide, and pioneer and optiarc on sata (marvell 6145)
>> (see my "lsscsi.txt")
> 
> Ah... it's a marvell.  MV ahci support is somewhat limited at the moment.
> 
>> First I tried wodim -devices then were lots of ata errors and
>> timeouts and after some time wodim printed "wodim-devices-1.txt"
>> where it recognized LG and pioneer but not optiarc.
>> But next time I run wodim -devices it doesn't
>> recognize even pioneer (only IDE LG drive is listed)
>> "wodim-devices-2.txt"
>> The syslog dump of the above test is in "syslog-devices.txt"
>> 
>> Next I rebooted and tried mounting.
>> First I mounted a CD normally on pioneer. Then I ejected
>> it from pioneer and inserted into optiarc.
>> Interesting that hal daemon printed corrected CD name
>> from optiarc.
>> But then I tried mounting to optiarc, ata errors appeared and
>> mount gave up after long time.
>> Then I ejected from optiarc and tried to mount to pioneer
>> again but this time pioneer doesn't work either -
>> Buffer I/O error on device sr0, logical block 329952
>> See the test in "syslog-mounting.txt"
>> 
>> I also attach my kernel config. I used normal unpatched
>> 2.6.24.4 on amd64, I compiled it myself on debian testing
> 
> Yeah, what happens is that the controller somehow doesn't like certain 
> ATAPI commands (maybe it doesn't really enjoy short or unaligned transfers, 
> both cases are data-in commands w/ 2 byte buffer).
> 
> The port completely locks up afterwards which is unusual for ahci port and 
> more unusually it takes the other port on the controller with it. hald 
> tries to poll the other device and thus the driver issues TUR and ta-da the 
> port is completely dead already.
> 
> Can you please give a shot at 2.6.25-rc8 and post resulting kernel log?  
> Buffer aligning / padding support is improved there.
> 
> Thanks.
> 
I'm found simular report but for intel ahci -
https://bugzilla.altlinux.org/show_bug.cgi?id=15087

Here is lspci -vvnn output
https://bugzilla.altlinux.org/attachment.cgi?id=2543

And the dmesg with timings
https://bugzilla.altlinux.org/attachment.cgi?id=2546

The symptoms looks the same except failed ATAPI commands. I don't know
it's important or not and may we combine this bugs.

It's reproducible with 2.6.24.4 kernel with stock ahci driver. 

-- 
WBR et al.