[3248] in linux-scsi channel archive
Re: SCSIsnoop
daemon@ATHENA.MIT.EDU (Leonard N. Zubkoff)
Sat Feb 7 02:37:08 1998
Date: Fri, 6 Feb 1998 19:43:45 -0800
From: "Leonard N. Zubkoff" <lnz@dandelion.com>
To: root@mauve.demon.co.uk
CC: linux-scsi@vger.rutgers.edu
In-reply-to: <199802061711.RAA00602@mauve.demon.co.uk> (message from Ian
Stirling on Fri, 6 Feb 1998 17:11:11 +0000 (GMT))
From: Ian Stirling <root@mauve.demon.co.uk>
Date: Fri, 6 Feb 1998 17:11:11 +0000 (GMT)
Is there such a thing?
I'm thinking of something like
connect second controller to scsi chain of box running 95,
with a SCSI device, that the maker won't tell you how
to talk to, and listen to the interaction between the driver
and the device.
Only listening to one side would not be a big problem, neither
would cable mods, to stop the snooping adaptor writing.
They are typically called SCSI Bus Analyzers, are quite expensive, and
indispensable for tracking down certain kinds of SCSI problems. They are
available as standalone units, and as PCMCIA interface cards. Check out
http://www.ancot.com for one of the brands. I've thought about the idea of
using a (probably) dumb host adapter for this, but there would be a lot of work
in creating readable SCSI traces from the raw signals.
Leonard
