> Michael George [mailto:[EMAIL PROTECTED]] wrote:
> Sent: Monday, February 08, 1999 1:50 PM
> To: [EMAIL PROTECTED]
> Subject: Re: AHA-2940UW ... once again.
>
>
[snip]
> > > Are you sure you have set the jumpers on the end devices to
> > > be terminated?
> >
> > As both ends of the cables have terminators on them (i.e.
> the (Term) note) I
> > did not think this was necessary but I'll check this out.
>
> On my system, I just have the cables that came in it. Those
> cables are both
> ribbon cables with two connectors on them -- one is a 50-pin,
> the other is a
> 68-pin. I'm guessing you have the same setup, except that
> you might have
> cables with more than two connectors on them.
>
[snip]
>
> > > Are you sure that the other devices are NOT terminated?
> > > Specifically, the
> > > tape drive which is in the chain before the CD-ROM drive...
> >
> > Yes.
>
> Don't take this the wrong way, but just above you said you
> didn't think that
> you had to check the jumpers for internal termination, but
> now you say that
> you are sure the intermediate devices are *not* terminated.
> I presume you
> checked and knew for sure before writing back.
>
Actually I was right and all devices were set with termination off. I fully
believed that the LVD and active terminators at the end of each cable should
terminate the string. However read on ...
> BTW, if this *were* the problem, I would guess the SCSI bios
> would not be able
> to see the device.
>
Funny thing is that may have been the problem but it didn't freak the bios
out so remained hidden. I now have an answer, sort of.
In trying different combinations I never tried setting the last device's
term to on even with the cable being terminated.
Well after moving the CDROM to be the last physical device on the SCSI2 side
(yes I know how I listed them, forgive me, I had it and the TD listed in
scsiID order) I set it's termination to ON, left all the cable terminators
in place, fired her up and voila!
What will puzzle me (and I plan on testing some variations or someone can
educate me) is what made the difference? I, like I said, am still learning
SCSI so this was all very interesting but I am just glad that now it appears
to be working. I will be testing all this during burn in of course. :)
So for those out there here is what is working for me:
|<----------------UW----------------->| |<----------U---------->|
(LVDTerm)-(E)-(E)-(E)-(E)-(HDD1)-(HDD0)-(Host)-(TD(4))-(CD(5))-(ActTerm)
Int. Term ON --> ^^^^ ^^^^^
As always YMMV.
Thanks all,
Paul Pettit | Opinions and advice expressed are from me
CTO | and are not my employer's.
Consistent Computer Bargains, Inc.
http://www.ccbnpts.com
If you had to identify, in one word, the reason the human race has not
achieved, and never will achieve, its full potential, that word would
be: "meetings." -- Dave Barry
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