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From: akm@spencer.cs.uoregon.edu (Anant Kartik Mithal)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: ST251 Jumpers
Summary: these are *not* terminators
Keywords: Seagate, Hard Disk, Jumpers, Drive Select
Message-ID: <1990Aug17.180053.6503@cs.uoregon.edu>
Date: 17 Aug 90 18:00:53 GMT
References: <90228.154810JAM167@psuvm.psu.edu> <1990Aug16.223713.239@ux1.cso.uiuc.edu> <1312@gold.GVG.TEK.COM>
Sender: usenet@cs.uoregon.edu (Netnews Owner)
Organization: Department of Computer Science, University of Oregon
Lines: 29

In article <1312@gold.GVG.TEK.COM> grege@gold.GVG.TEK.COM (Greg Ebert) writes:
>In article <1990Aug16.223713.239@ux1.cso.uiuc.edu> mjoseph@ux1.cso.uiuc.edu (Mark Joseph) writes:
>#
>#-------------------------  : : : : : : : :  -------------
>#         J1                                       J2
>#                           | | | | | | | |
>#                            don't  D D D D
>#                            know   S S S S
>#                                   4 3 2 1
>#
>
>The "don't know" jumpers are probably terminators. Put them on the drive at
>the end of the control cable. If you only have 1 drive, terminate it.
>							---------

No, no, they are *not* terminators. The terminators are in the middle
of the circuit board. The jumpers are drive selects. Well, I suspect
that they are. I *know* that 1-4 are drive selects, and I *suspect*
the rest are too. I *think* that we could go up to 8 drives, but
haven't heard of a controller card that allows that. 

The terminators sit on a totally different place on the logic board.

kartik

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Anant Kartik Mithal					akm@cs.uoregon.edu
Department of Computer Science				akm@oregon.BITNET
University of Oregon