Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!wuarchive!rex!uflorida!gatech!bloom-beacon!eru!hagbard!sunic!mcsun!ukc!mucs!logitek!sph From: sph@logitek.co.uk (Stephen Hope) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: Installing a Second RLL Hard Disk controller w/ MS-DOS Keywords: RLL, AT, controller, msdos Message-ID: Date: 2 Apr 91 10:31:00 GMT References: <17819@sdcc6.ucsd.edu> Organization: Logitek Plc. Lines: 61 cg199ag@icogsci1.ucsd.edu (Steve - Happy Hacker) writes: >Greetings! > In my never-ending quest for more hard disk space, I am attempting to install >a third and fourth RLL hard disk in my 386. (I had two extra drives, so I >figured buying another controller would be worth it.) >If you want to know what I learn from this article, send me a "Me too!" and >I'll mail you a summary. (or post if interest is high) >I know that the XT's was at 320h-323h for the primary and I think 324h-327h >for the secondary controller. If anyone has any for-sure numbers on the AT >cards, (are they the same?) please share them. HD Primary address: 1f0-1f7,3f6,3f7 HD Secondary : 170-177,376,377 >Things I have tried to no avail: Try disabling the secondary floppy controller - I have had problems with this on Wyse and Compaq machines. > This all leads me to believe that the BIOS can't be relocated (by > hardware), so as long as one is enabled, it works. Two will fight, > and none will simply not be there. In any case, the BIOS is _not_ > finding the second pair of drives. (Neither does the AMI BIOS) We have picked up an article from WD TEch Support Bulletin Board in the UK, which documents using a WD1002-27X (RLL) and WD1002-WAX (ST506). The important points here were: a) Relocate the BIOS on 1 board and enable both (at different RAM addresses). b) Use the WD SuperBIOS chips c) Low level format all drives with SuperBIOS d) FDISK etc with Disk Manager (from Ontrack) Use manual setup, not automatic. e) Use DOS 3 or later, preferably from a good manufacturer (this may or may not include Amstrad) f) Use the Disk Manager device driver on the boot drive to access the extra controllers disks. These instructions are for an old copy on Disk Manager (3.2) and I think later versions have more support for extra controllers. >Thanks very much! >==== >-Steve >shaehnic@ucsd.edu -or- shaehnic@ucsd.bitnet Stephen Hope, LTSS #include