Re: Firewire Woes.

From: Stefan Richter <stefanr_at_s5r6.in-berlin.de>
Date: Wed 06 Apr 2005 - 22:14:57 CEST
Message-ID: <42544341.2030404@s5r6.in-berlin.de>

Kyle Schmitt wrote:
> --- Stefan Richter <stefanr@s5r6.in-berlin.de> wrote:
>> The sbp2 host(s) and devices show only up in dev and sysfs (maybe also
>> still in procfs) after the ieee1394 driver properly recognized the
>> device, handed it over to sbp2, and sbp2 logged in into it.
>
> Humm I didn't specifically look for a /dev/sbp2 device
> but I didn't notice one either...

Sorry, I meant "devices driven by sbp2", not "device files served by
sbp2" (there are none). /dev will contain SCSI device files, nothing
directly from sbp2. sbp2 acts as a SCSI host bus adapter driver.

If there is no message "sbp2: Logged into SBP-2 device" in the syslog or
dmesg, then there will also be no SCSI device files for the device.

>> Does gscanbus show it with a disk pictogram or with
>> a question mark (unknown device type)?
>
> Sorry for the (long) delay there. Gscanbus shows a
> disc icon, no questionmark. If I unplug the device
> and plug it back in, sometimes gscanbus showed a
> questionmark, others it showed a disc.

That means that either an error occured when sbp2 tried to log in (you
will find an according dmesg message), or there was an earlier problem
for the ieee1394 base driver to detect that it is an SBP-2 device (thus
sbp2 would not even be bound to the device). In the latter case, they
may be certain error messages in dmesg, or it may have failed silently.

Gscanbus probes the device independently of the ieee1394 driver's
probing routines, which have some long-known problems WRT timing and
retries.

-- 
Stefan Richter
-=====-=-=-= -=-- --==-
http://arcgraph.de/sr/
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Received on Wed Apr 6 22:16:06 2005

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