[1648] in linux-scsi channel archive
Re: SCSI Cables and aha2940
daemon@ATHENA.MIT.EDU (James T. Kirk)
Mon Mar 31 22:46:52 1997
Date: Mon, 31 Mar 1997 21:35:40 -0600 (CST)
From: "James T. Kirk" <root@plantel.com>
To: Dave Wreski <tel1dvw@is.ups.com>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.GSO.3.93.970331211113.3847R-100000@butthead>
Well again it's probably a case of "It's not supposed to work"
when you put all connectors into use, it creates a fragmented SCSI chain,
with three terminations. SCSI is supposed to be a linear model with two
ends. Using all three make a fork in the chain and can result in echo and
other errors. Like I said, it's not supposed to work, and I wouldn't
trust it for real world data.
Morgan Nelson
Plan Telecommunications
On Mon, 31 Mar 1997, Dave Wreski wrote:
>
> On Mon, 31 Mar 1997, James T. Kirk wrote:
> >
> > any two of the connectors may be used, but not all three. The way the
> > card is designed, using all three breaks SCSI termination rules and will
> > not work.
>
> Are you sure about this? I tried my Sparc cable, in place of the one that
> I figured to have problems, and all devices appeared just fine. Its
> definately a cable problem. I do have both internal 'plugs' active on the
> 2940. I can understand how it would break termination rules, though.
> Maybe I should get an updated c.p.s howto.
>
> Dave
>
>
