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From: jim@world.std.com (James D. McNamara)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: ST251 Jumpers
Keywords: Seagate, Hard Disk, Jumpers, Drive Select
Message-ID: <1990Aug17.052902.25561@world.std.com>
Date: 17 Aug 90 05:29:02 GMT
References: <90228.154810JAM167@psuvm.psu.edu> <1990Aug16.223713.239@ux1.cso.uiuc.edu> <1312@gold.GVG.TEK.COM>
Organization: Software for the People
Lines: 31

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, I don't mean "Drive over it with a steamroller" :-O ]

I installed a second ST251-1, and had to take the "terminating
resistor" off of one of the drives.  The terminating resistor is a 1"
bar covering leads somewhere *else* on the drive.

I jumped the "DS2", but left all other pins -- including the "DON'T
KNOWS" -- open.  I don't think the "DON'T KNOWS" need to be
terminated.

(BTW, a fellow netter suggested taping the unused terminating resistor
onto the drive, so it doesn't get lost.)

-- 
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