Adaptec termination problem...

Grover Davidson devildog at mvp.net
Wed May 27 18:16:26 PDT 1998


After checking the specs on my drive (a DFHSS4W), I found this little note:

Enable active termination 

Upon request, Single Ended 50 and 68 pin models were available with on card SCSI bus Active terminators. (Please contact
your IBM Customer Representative for the appropriate card PN). 


So, ative termination is an OPTION and they are NOT disclosing the 
board part number(s).

I just went straight to external active termination and have
had no problems.

Good Luck!

Grover
According to Robert G. Brown:
> 
> On Sat, 23 May 1998, OLK wrote:
> 
> > Try 2xIBM+1xConner+CDROM with AHA-2940 and you'll see only one
> > combination
> > working :
> > IBM=ID0,IBM=ID1,CDROM=ID2,Conner=ID3 or higher and Terminated.
> > Chances are 99.9%, that all other combinations especially with one
> > terminated IBM-HD and other(IBM) not, will fail.
> > Rule of Thumb: Adaptec+IBM's+Whatever --> Desaster
> 
> Gee, this is really interesting.  In the sense of the Chinese curse,
> of course.  Does this mean that "Internal, jumpered termination
> doesn't work on IBM drives" even if they are the only drive on a given
> SCSI branch?  What about external termination?  If you run a computer
> store, you presumably have tried this -- do they have terminators that
> plug onto the ends of those nifty internal ribbon cables?
> 
>    rgb
> 
> Robert G. Brown	                       http://www.phy.duke.edu/~rgb/
> Duke University Dept. of Physics, Box 90305
> Durham, N.C. 27708-0305
> Phone: 1-919-660-2567  Fax: 919-660-2525     email:rgb at phy.duke.edu
> 
> 
> 
> 
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-- 
Grover C. Davidson II 		(devildog at mo.net)
828 Fall Crown Ln               #include <std_disclaimer.h>
Fenton, Mo 63131     	 	Voice: 314-343-5642


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