Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!decwrl!nsc!amdahl!drivax!alexande
From: alexande@drivax.UUCP
Newsgroups: net.micro.pc
Subject: Re: PC-DOS Multiple Hard Disks
Message-ID: <464@drivax.UUCP>
Date: Mon, 28-Apr-86 13:35:00 EDT
Article-I.D.: drivax.464
Posted: Mon Apr 28 13:35:00 1986
Date-Received: Thu, 1-May-86 04:13:39 EDT
References: <113@druri.UUCP> <660@nicmad.UUCP>
Reply-To: alexande@drivax.UUCP (Mark G. Alexander)
Distribution: net
Organization: Digital Research, Monterey, CA
Lines: 29
Keywords: PC-DOS, hard disk

In article <660@nicmad.UUCP> brown@nicmad.UUCP (Mr. Video) writes:
>Most hard disk controller boards will allow you to connect up 2 hard drives.
>Both of which, must be the same size.  You tell the controller, via jumpers,
>what size drive is attached.

The controllers I have examined or used (Xebec, WD, Adaptec) have separate
jumpers for each drive, so you CAN use different size drives.  This feature
is supported by the ROM BIOS on the controller card.

>The 34 or 40 pin (I forget which) has two connectors
>on it.  It then connects up like the floppies are.  The other smaller cable
>is separate, so there is one per drive.

Actually, there is a 34 pin cable (the data cable) that connects to both
drives, and a 20-pin cable (the control cable) for each drive.

Also, don't forget to remove the termination resistor pack on all drives
except the last one on the 34-pin cable chain.  Things usually work without
this precautionary measure, but the drive and controller makers want you
to do it anyway.
--
#include "disclaimer.h"
#include "quote.h"
-- Mark Alexander   {ihnp4,mot,ucscc,ucbvax!hplabs!amdahl} !drivax!alexande
-- 
--
#include "disclaimer.h"
#include "quote.h"
-- Mark Alexander   {ihnp4,mot,ucscc,ucbvax!hplabs!amdahl} !drivax!alexande