[4833] in linux-scsi channel archive
Re: Duplicating the Powerbook scsi device feature
daemon@ATHENA.MIT.EDU (Matthew Jacob)
Wed Oct 7 07:54:53 1998
Date: Wed, 7 Oct 1998 04:48:23 -0700 (PDT)
From: Matthew Jacob <mjacob@feral.com>
Reply-To: mjacob@feral.com
To: Jonathan Moore <moorejon@usd465.com>
cc: Antonio Kanaan <kanaan@fsc.ufsc.br>, linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.96.980928085023.7682A-100000@usd465.com>
This is 'target mode'. There are several host adapter drivers with this
capability latent in linux (I had the aha1542 working at one point and
I've been doing stuff with the Qlogic SCSI/FC card- works fitfully) but
fewer that make it bidirectional (handle initiator and target functions
simultaneously), and the major issue after this is the device layer
context which then figures out how to export (other) filesystems
local to the machine you're doing this on (really similar to the
nfs export semantics).
Short answer: theoretical possible- not too much readily available.
On Mon, 28 Sep 1998, Jonathan Moore wrote:
> I have been curious for some time about duplicating a feature of the Mac
> Power Book on a linux pc. The Powerbook can be put in a mode where it
> acts as a scsi device which can be plugged into another computer and used
> as though it were a scsi hdd.
>
> Does anyone no if this requires special hardware in the scsi controller,
> or is any standard controller capable of sending the correct signals
> across the scsi bus to make it look to another contoller as though a
> non-existant drive exits on the bus? As in is it possible for any
> controller to send signals to another card plugged into a different
> computer to make it think there is a scsi device plugged into it that
> doesn't really exist?
>
> thanks in advance for any info
>
> jm
>
>
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