Re: Prolific IDE/1394 bridge does not work

Michal 'hramrach' Suchanek wrote:
>> I tried 2.6.8.1 kernel, 2.4.26 kernel, 2.6.10 kernel, ieee1394 from the
>> linux1394.org site, and none works.
...
> I tried more experiments with the enclosure.
...
> With Knoppix 2.4.27 kernel the enclosure works. However, I cannot
> disconnect and reconnect it.

Did you run "umount ...", then disconnected the drive, then run
"rescan-scsi-bus.sh -r"? The latter is required after device
disconnection under kernel 2.4 before any further access to the scsi
subsystem (except with a kernel patch).

> With Knoppix 2.6.9 kernel it fails in
> similar way as the vanilla 2.6.10 with updated ieee1394 (and patches to
> make it boot on the system).

Try the hints given in the FAQ at www.linux1394.org about aborted sbp2
commands. If this still does not help, wait for kernel 2.6.11 or use the
latest 2.6.11 prerelease together with 1394 drivers from the
linux1394.org source repository. (Its "trunk" directory is a replacement
for linux/drivers/ieee1394.)

> With Debian 2.4.27-2 kernel it fails. No block device for the sbp2 bridge
> is created - cannot find any in either dmesg and proc/scsi.

"rescan-scsi-bus.sh"?

> Since all host adapters I tried so far vere VIA chips could the problem
> be in the VIA ieee1394 chip?

Most adapters with VIA chips work fine. Many Linux users have one,
including I, and I do not even see those sbp2 datatransfer problems
under kernel 2.6 other people keep reporting. (None of my FireWire
devices is Prolific based though.)

A few VIA based adapters were found to feature very specific problems,
but according to your logs, your card is not of this (rare) category.

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