Date: Wed, 27 May 1998 20:31:12 -0500 (CDT) From: Grover Davidson <devildog@mvp.net> To: rgb@phy.duke.edu (Robert G. Brown) Cc: delise@online-club.de, aic7xxx@FreeBSD.ORG Subject: Re: Adaptec termination problem... Message-ID: <199805280131.UAA00373@mvp.net> In-Reply-To: <Pine.LNX.3.96.980527132917.30683E-100000@ganesh.phy.duke.edu> from "Robert G. Brown" at May 27, 98 01:32:04 pm
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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@phy.duke.edu > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe aic7xxx" in the body of the message > -- Grover C. Davidson II (devildog@mo.net) 828 Fall Crown Ln #include <std_disclaimer.h> Fenton, Mo 63131 Voice: 314-343-5642 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
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