Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!uunet!mcsun!ukc!axion!delluk!holly!tim From: tim@dell.co.uk (Tim Wright) Newsgroups: comp.unix.sysv386 Subject: Re: Adding IDE drive to ISC 2.2 on ESDI Message-ID: Date: 23 May 91 10:55:36 GMT References: Sender: usenet@delluk.uucp (Usenet posting login) Organization: Dell Computer Corp., Bracknell, UK Lines: 33 In davidg%aegis.or.jp@kyoto-u.ac.jp (Dave McLane) writes: >I'm running ISC 2.2 on a Dell System 333D (386 33 MHz) with a >single 320 MB ESDI hard disk + Ultrastore 12F controller. Now I >want to add a 200 MB IDE drive which will fit inside the case (as >the 3 regular drive bays are taken up with the ESDI, a tape unit, >and a floppy). >According to Dell, the IDE must be the primary drive and the ESDI >the secondary drive but I don't want my root directory, etc. on the >IDE as it is materially slower than the ESDI (I am currently >running the IDE on a DOS system). >So the question is, can I have the IDE drive defined as the >primary hard drive, but have my root directory, etc. on the >secondary drive? If you *really* want to do this then here's how. Ignore the onboard IDE controller, go buy a plug-in IDE controller (they shouldn't be too expensive since they're pretty simple). You can change the I/O addresses on the IDE controller to the secondary HD addresses. Now you only need to change the IRQ from 14 to 15. Ready ... cut the track from 14 and solder across a wire from 15 to the board (i.e. not bus) side of the cut track. You now have a *secondary* IDE controller for your machine. It works (at least with ISC 2.0.2). I've done it :-) Tim -- Tim Wright, Dell Computer Corp., Bracknell | Domain: tim@dell.co.uk Berkshire, UK, RG12 1RW. Tel: +44-344-860456 | Uucp: ...!ukc!delluk!tim Smoke me a Kipper, I'll be back for breakfast - Red Dwarf