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

Stefan Richter wrote:

> 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.

It does certianly sound like it especially since the drive is only bus
powered right now. The only machine I have really tested it on other
then this one is a mac, and I remember reading somewhere that the mac
tends to provide more power over the bus. I'll go get a power adapter
and try it with that.

>
> > 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.

Hopefully it's just power loss, if that doesn't solve it then I'll try
hooking up the rear power and see if that makes a difference.

Thanks for the response though, I'll let you know what solves it.

Andre

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Received on Wed Nov 17 08:30:40 2004