Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!convex!mic!letni!rwsys!merch!cpe!adaptex!adaptx1!neese
From: neese@adaptx1.UUCP
Newsgroups: comp.periphs.scsi
Subject: Re: 1542B Installation Problem
Message-ID: <283400151@adaptx1>
Date: 18 Jun 91 07:37:48 GMT
References: <4450@polari.UUCP>
Lines: 43
Nf-ID: #R:polari.UUCP:4450:adaptx1:283400151:000:1741
Nf-From: adaptx1.UUCP!neese    Jun 17 16:40:00 1991


>/* ---------- "1542B Installation Problem" ---------- */
>OK, here's the configuration:
>
>    16MHz NEATsx 386sx motherboard, w/4, 1M SIPPs
>    Micropolis 1578-15 330Mb HD
>    Hercules clone display adapter
>    IBM PC-DOS 3.3
>
>The other cards are apparently irrelevant, as the following troubles
>occured with everything else removed from the system.
>
>The 1542B is configured with BIOS enabled. I've tried DMA channels 5
>and 0, and port addresses 330, 334 and 130 (the latter two with BIOS
>disabled & ASPI4DOS.SYS installed). I haven't bothered to change the
>interrupt/IRQ from the default 11, since the 1522 I'm using is setup
>on 11 and works fine.
>
>At bootup, the SCSI BIOS reports that it found the drive at 0/0, and
>that it's been installed as drive C. OK so far.
>
>When I try to partition the drive with FDISK, "Create a DOS partition",
>the system reboots.
>
>Next attempt, I start up the BIOS utility with debug, g=dc00:6.
> 
>It shows no devices, the 1542's LED and the drive's LED remain on for
>a while, then it reports "TIMEOUT ERROR/SCSI INQUIRY COMMAND".
>
>This seemed like a dead end, so that's when I tried disabling the BIOS
>and installing ASPI4DOS /Paddress. When ASPI loaded, it said "Failed
>scanning for SCSI devices" after a long wait.

Check the DMA jumper speed setting.  Move it to 5.0MB/sec.  Try running the
bus master test located at dc00:9.  If this fails with the adapter set to
5.0MB/sec, the 1542 will not work in this system.  Failure of the bus master
test is about as catastrophic as it gets.  Simply put, the motherboard will
not support a bus master.

			Roy Neese
			Adaptec Senior SCSI Applications Engineer
			UUCP @  neese@adaptex
				uunet!cs.utexas.edu!utacfd!merch!adaptex!neese