Re: sbp2 module errors when reading from external FW drive.

Andre Baron wrote:
> This is connected to a Seagate 2.5" 40GB drive in a FW case using a
> Gensys GW711FW chipset. This is all connected through front panel
> connector on my Antec Sonata Case.
>
> Transfers from that drive are extremely slow and it sounds like the disk
> is spinning down and back up.

If it really spins down during operation, it may be insufficient bus power.

> While doing the copy the kernel.log has a
> bunch of these errors.
> Nov 14 13:37:01 localhost kernel: ieee1394: sbp2: aborting sbp2 command
> Nov 14 13:37:01 localhost kernel: Read (10) 00 01 a7 fe 98 00 00 f8 00

Can be kernel bugs (SBP-2 with kernel 2.6 does not work at all or not
well enough for several people), firmware bugs of the drive (try
modprobe sbp2 serialize_io=1), defects on the disk, noise on the
controller or cable (front panel connectors have been discussed here
recently), or a power problem.

> As an aside this dirve works fine on a Mac. I've also been able to use
> it on windows, but windows has not been installed on my computer in a
> long time.

This renders defects on the disk and firmware bugs less likely. Kernel
2.6 crappiness, EMI, and power loss remain as candidates.

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