Re: "aborting sbp2 command" expected in kernel.org FireWire maybe

Pat LaVarre wrote:
> Mark K:
> I now have two reasons to believe that Knoppix thinks the sbp2
> need for serialize_io is and has been normal since 2.4 thru 2.6,
> not abnormal.

It is reasonable to include this option in a distro. There are
few (very few) devices with bad firmware that do not work
deserialized. On the other hand, performance gains in deseria-
lized operation are neglectible with all the other well-behaved
devices.

And, as I mentioned before, there are some buggy kernel releases
where serialization masks the bugs. This happened during kernel
2.4.20 IIRC, and with some 2.6 kernels. Don't know about the
latest 2.6 kernel though.

> 1) I see the Knoppix 2.6 /etc/modules.conf includes the
> in-2.6-misspelled line:
>
> options sbp2 sbp2_serialize_io=1

The modules.conf is perfectly OK since it is only used if a 2.4
2.4 kernel runs. The modutils automatically use modprobe.conf
under kernel 2.6 (...if that file is present, but I assume it
is in a 2.6 based distribution).

>> I'm suspecting that some part of the SBP2 command tables might not be
>> very happy talking to a very new type of drive.
>
> Ouch. To distinguish between sbp2 etc. choking over DVD/CD from sbp2
> etc. choking over specifically my device, I think I next need to go
> find another FireWire DVD/CD to try?

I don't think the new drives use any vendor specific commands
today, or do they? Your system always chokes on "Read (10)"
anyway, which is not at all special to DVD-ROM/R/RW.

-- 
Stefan Richter
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http://arcgraph.de/sr/
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