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To: gentoo-user@g.o
From: Dirk Heinrichs <ext-dirk.heinrichs@...>
Subject: Re: USB, udev, and SCSI emulation
Date: Fri, 3 Mar 2006 09:48:24 +0100
Am Donnerstag, 2. März 2006 19:44 schrieb ext Wes Gray:

> I've been researching getting my camera to work and I have a few
> questions. I'm running udev and kernel 2.6.15.1.

What kind of camera is this? Some can be used via USB mass storage support, 
other's can only be accessed via gphoto2.

> 1) For USB mass storage to work do I still need SCSI emulation or does
> udev remove that requirement?

USB mass storage devices are treated just like SCSI devices, no emulation 
needed.

> 2) If so do I still need to pass the kernel parameter hdc=ide-scsi?

This is unrelated to USB mass storage. It's SCSI emulation for IDE devices 
(mostly CD writers).

> 3) Should SCSI emulation be automatic with udev, or might I need to write
> 	a rule for it?

Udev has nothing to to with SCSI emulation. SCSI emulation happens in the 
kernel, udev runs in userland. However, if you _want_ your SCSI device to 
have a different name than sda1 for example, you have to write a udev rule.

> 4) If SCSI emulation is working will I alway see a line in dmesg about a
> 	new SCSI device?  Most howto's seem to suggest this but I want to
> 	be sure.

Yes. Again unrelated to SCSI emulation. The SCSI subsystem will print out a 
line for each new SCSI device, emulated or real.

HTH...

	Dirk
-- 
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Re: USB, udev, and SCSI emulation
-- Wes Gray
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-- Wes Gray
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