Newsgroups: comp.os.os2.misc Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!ira.uka.de!fauern!NewsServ!rommel From: rommel@Informatik.TU-Muenchen.DE (Kai-Uwe Rommel) Subject: Re: OS/2 with AT clone, Adaptec 1542B, and SCSI drive Message-ID: <1991May13.090844.12795@Informatik.TU-Muenchen.DE> Sender: news@Informatik.TU-Muenchen.DE Organization: Technische Universitaet Muenchen, Germany References: <2827F4F5.3E2E@tct.com> <1991May9.032806.26589@netcom.COM> Date: Mon, 13 May 1991 09:08:44 GMT Lines: 39 In article m1phm02@fed.frb.gov (Patrick H. McAllister) writes: >In article <1991May9.032806.26589@netcom.COM> feustel@netcom.COM (David Feustel) writes: > OS/2 doesn't work with SCSI yet. Try again in a year. > -- > David Feustel, 1930 Curdes Ave, Fort Wayne, IN 46805, (219) 482-9631 > EMAIL: netcom.com >I am continually surprised whenever I see this statement: I have OS/2 1.3 >running on my Northgate clone with an Adaptec 1542B SCSI host adapter with >no problems. What doesn't work, I am told, is HPFS on a SCSI; I can't tell There seems to be much confusion about SCSI support under OS/2. As far as I know, OS/2 currently supports *IBM's* SCSI hardware. But SCSI host adapters are not standardized and thus each of them requires a special (different) driver for OS/2. Thus, many other SCSI adapters may not be supported under OS/2. I saw Adaptec (for 1.1) and Future Domain (don't know about version) advertizing OS/2 support for their SCSI adapters. On the other side, several SCSI adapters, such as the 1542B from Adaptec (am I right? I have read this) simulate a standard ST-506 controller on the register level for the first two SCSI drives. This allows OS/2 to run on those adapters but it can only use the first two drives (hard drives). I have not yet tested such a machine. But I cannot imagine why OS/2 1.2/1.3 should not be able to use HPFS on such controllers as it has no problems to use HPFS on real ST-506 controllers or other controllers that emulate ST-506, like IDE adapters (I use an IDE board with two drives and use HPFS). I have heard too, that Nokia Data offers their OEM version of OS/2 with driver for the Adaptec 1542A because they use this controller in their machines. I got this information directly from a Nokia Data representative here in Germany. Kai Uwe Rommel /* Kai Uwe Rommel, Munich ----- rommel@lan.informatik.tu-muenchen.dbp.de */ DOS ... is still a real mode only non-reentrant interrupt handler, and always will be. -Russell Williams