Re: PROBLEM: "lost interrupt (Status 0x50)" from DVD drive, long wait on 2.6.31 till 2.6.32rc6

[Tejun Heo <tj@kernel.org>]

Hello,

On 11/16/2009 12:57 PM, Erik Postma wrote:
> 2009/11/15 Erik Postma <e.j.postma+linux-ide@gmail.com>:
>> (...)
>> [7.7.] Other information that might be relevant to the problem
>>       (please look in /proc and include all information that you
>>       think to be relevant):
>>
>> Here's dmesg:
>> (...)
> 
> Just now I had a boot where it did something different; here's what I
> guess is the relevant part of dmesg. This is the same kernel and of
> course the same hardware as described in the earlier email. Does the
> fact that it's unpredictable mean there's possibly hardware issues?
> Still have not seen any sign of trouble on 2.6.30 or earlier.
> 
> [    6.872066] ata4.00: qc timeout (cmd 0xa0)
> [    6.872123] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action
> 0x6 frozen
> [    6.872183] ata4.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
> [    6.872184]          cdb 00 00 00 00 00 00 00 00  00 00 00 00 00 00
> 00 00
> [    6.872186]          res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask
> 0x5 (timeout)
> [    6.872337] ata4.00: status: { DRDY ERR }
> [    6.872417] ata4: soft resetting link
> [    7.052604] ata4.00: configured for UDMA/33
> [    7.053051] ata4: EH complete

Timeouts on TURs.  These seem pretty common for optical drives for
some reason.  I can't think of anything which has changed since .30
which could have affected execution of NODATA command.  Is the drive
useable once those timeouts passed?  Does having a media in the drive
or not make any difference?

Thanks.

-- 
tejun