Path: utzoo!attcan!utgpu!watmath!att!mcdchg!ddsw1!karl From: karl@ddsw1.MCS.COM (Karl Denninger) Newsgroups: comp.unix.xenix Subject: Re: Two HD controllers (Was: Re: Xenix device drivers under Unix) Summary: We run two controllers and 4 drives here under RLL Message-ID: <1989Sep21.151132.8684@ddsw1.MCS.COM> Date: 21 Sep 89 15:11:32 GMT References: <4552@cps3xx.UUCP> <56d2.250eedb5@ibmpcug.co.uk> <37102@conexch.UUCP> <246@bahamut.fsc.com> <76@promark.UUCP> Reply-To: karl@ddsw1.MCS.COM (Karl Denninger) Organization: Macro Computer Solutions, Inc., Mundelein, IL Lines: 36 In article <76@promark.UUCP> mark@promark.UUCP (Mark J. DeFilippis) writes: >Is there anyone out there that is aware of an AT controller card that has the >ability to be configured at another address and interrupt? Yeah, Adaptec 2372s can be jumpered for both. Most others can be set up for a secondary address, but NOT interrupt (you get to do a jumper wire for that). >Is there anyone running multiple drive controller cards under SCO? >Are their any reasons why we couldn't run more then 1 drive controller >under SCO? It works. A little bit of a hassle to set up, but it works. >The WD-1003-WAH is a MFM Controller and was the standard controller shipped >with the PC/AT. The WD-1006-WAH is a MFM Controller with 1;1 interleaving >capability and full track buffering. Roughly, (some of you get the finger >off the flame button! :-) ) the WD-1006-WAH offers almost a 40% performance >improvement over the WD-1003-WAH. The WD-1005-WAH is an ESDI controller. The WD1006 series gives us a 100% performance increase over the ACB2372 or a WD1003 series board, not 40%. The difference is like night and day. In fact, on Xenix anyway, it's so close to ESDI performance that it is very difficult to perceive a difference from a user perspective (it's there, but only noticable under EXTREMELY heavy loads). Soon we will hack up one of our cards to work on a secondary address, then all 4 of our disks will scream like the two primaries do now. We love those boards, and SCO Xenix likes 'em too. (then again we sell the things, so I guess I'm somewhat biased :-) -- Karl Denninger (karl@ddsw1.MCS.COM, !ddsw1!karl) Public Access Data Line: [+1 312 566-8911], Voice: [+1 312 566-8910] Macro Computer Solutions, Inc. "Quality Solutions at a Fair Price"