[1652] in linux-scsi channel archive
Re: SCSI Cables and aha2940
daemon@ATHENA.MIT.EDU (Chris Griffin)
Tue Apr 1 01:25:17 1997
Date: Tue, 1 Apr 1997 01:23:31 -0500 (EST)
From: Chris Griffin <boozer@vanadium.rollins.edu>
To: Dave Wreski <tel1dvw@is.ups.com>
cc: "James T. Kirk" <root@plantel.com>, linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.GSO.3.93.970331211113.3847R-100000@butthead>
On Mon, 31 Mar 1997, Dave Wreski wrote:
>
> On Mon, 31 Mar 1997, James T. Kirk wrote:
> > Do you have anything elso plugged into the 2940 internally? If both of
> > the internal connectors are used, say the 68 pin on a hard drive, and the
> > 50 pin on a cdrom drive, you cannot use the external plug. On the 2940,
> > 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
>
No, the aha2940uw can only have 2 of the 3 interfaces active at any one
time, and it does break termination. Any setup using all 3 would be very
unstable!
Chris
