Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!execu!sequoia!rpp386!deano
From: deano@rpp386.cactus.org (Dean Carpenter)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Multiple Drive Controllers on older PC's?
Summary: Possible to use multiple harddisk controllers
Keywords: controller multiple drive hard disk
Message-ID: <18133@rpp386.cactus.org>
Date: 13 Mar 90 05:08:15 GMT
References: <14656@cbnews.ATT.COM>
Reply-To: deano@rpp386.UUCP (Dean Carpenter)
Distribution: usa
Organization: Itty Bitty Machines (resident mad Aussie)
Lines: 18

In article <14656@cbnews.ATT.COM> tbm@cbnews.ATT.COM (thomas.b.merrick,54234,wi,2n020,508 374 5575) writes:
>
>2. Is it  possible to  use two hard  drive controllers  together in  the
>machine without conflict?  The older  MFM drives have slow access  times
>
Yes it is possible.  At least with original IBM equipment that is.  I've
had a system working with 4 of the IBM XT controllers (made by Xebec) each
controlling 2 drives.  C: D: E: F: G: H: I: J: all at once under DOS 3.3 in
a standard IBM XT with expansion unit.  Was a blast having 8 drive LEDs !

It's a matter of playing with jumpers on the card to disable the ROM on
all but one of them, and to set the other cards to different IO addresses.
If people are seriously interested, mail me and I'll dig out the information,
and I'll summarize the info if the volume warrants.
-- 
Dean Carpenter				
...cs.utexas.edu!bunyip!deano	   			 (preferred)
...cs.utexas.edu:ibmchs!auschs!ausvm1.vnet.ibm.com!deano (sometimes sporadic)