[1932] in linux-scsi channel archive
Re: Internal to External SCSI Connections
daemon@ATHENA.MIT.EDU (Robert Johannes)
Sat May 31 18:37:24 1997
Date: Sat, 31 May 1997 17:22:26 -0500
From: Robert Johannes <rjohanne@piper.hamline.edu>
To: "Larry M. Augustin" <lma@varesearch.com>
Cc: edwards@ioa.com, linux-scsi@vger.rutgers.edu
> Narrow devices like CD ROM drives should never terminate the SCSI bus
> since they typically use passive termination.
Larry, you say cdroms should never terminate the scsi bus: any scsi bus
or just the wide scsi bus? I'm asking because I've an ibm ultra scsi
drive and a cd-writer on the same adaptec 2940 ultra scsi adapter. The
cd-writer terminates the bus, is there a problem with this setup?
Also my ibm drive is supposed to transfer at a minimum sustained rate of
5.1 megs/s; I've used adaptec cd-creator to test the transfer rate, and
it always reports 3.72 megs/sec average rate for files that are 6 megs
or more; am I getting wrong readings? Could there be something wrong
with my scsi bus, could it be the cd-writer termination that is causing
a slower transfer rate than the specified minimum?
Any comments, suggestions, or ideas will be very welcomed.
Robert
