Very Computer

We swapped a motherboard and one hard drive in an OSR5.0.0 system and
cannot get past a very basic problem.  I now have the system stripped down
to the following configuration:

        MB using INtel 430HX Chipset (supports ECC/parity memory)
                (Model R528)
        Pentium 120
        Award BIOS 4.51PG dated 6/13/96
                Model Byte FCH  SubModel 01H  Revision 0
        32MB parity memory (with single bit ECC turned on)
        Adaptec 1542B SCSI id 7 external terninators installed
                IRQ 5, DMA 11, Address 0x330
        Conner CFP1060S SCSI id 0, unterminated
        NEC 3xi CD-ROM SCSI id 5, terminated

I can boot a small DOS partition OK but when I use Adaptec's EZSCSI
utility and it goes out looking for attached devices, it hangs with the
LEDs on both the Adaptec and the Conner on solid. I've run diagnostics to
check for IRQ/DMA conflicts and none are detected.  I've removed the other
two SCSI hard drives and tape drive to test but it still hangs.  If I run
PC Cerify Pro, it can successfully detect and list both the hard drive and
the CD-ROM as can the Adaptec aspi4dos.sys driver.

The Adaptec and all SCSI devices are setup exactly as they were in the
old, functioning system.

The CMOS setting for all IRQs (except 15 used by the SMC EtherPower card)
and DMAs are all set to "Legacy ISA".  Power Management is disabled as are
all onboard IDE stuff (floppy & HD).

I guess I'm down to pulling non-SCSI cards.?.?

PS. The MB comes from a reputable supplier who also sells systems with SCO
installed; the MB is supposed to work fine with SCO.

[Obviously] NOT a hardware person,
[Not so] Lucky

Lucky Leavell                            Phone: (812) 945-6555
Relational Information Systems, Inc.       FAX: (812) 949-9233

New Albany, IN 47150-2013                       71534,2674 (CompuServe)
WWW Home Page:  http://www.iglou.com/ris   ftp://www.iglou.com/members/ris

On Tue, 20 Aug 1996, it was written:

Quote:>    You may already have done some of these, but a good list of
> things to try would include

> - swapping the positions of the HD and the CD on the cable (and
>   swapping termination, of course)

 > - replacing the cable, even though it appears to be undamaged
Tried two other cables to no avail.

Quote:> - I think you said you had external termination on the Adaptec.
>   Replace with active terminator.  Or try using the on-board
>   terminators instead.  Just in case.

Finally, how many devices should supply terminator power (assuming they
are able to)? Can there be too many?

Quote:> - I doubt it's a DMA speed thing, but hey, crank it down a notch.
>   I don't trust the DMA test routine in the 154x BIOS, so rather
>   than risking problems, I find the highest speed at which the
>   card passes the test, and then set it one notch lower.  I've
>   never had a DMA problem this way - and I _have_ had DMA problems
>   at speeds that the self-test says work.

Quote:> - Disable sync negotiation on the SCSI card.

Quote:>    Good luck!

Have you considered a troubleshooting list such as this in the FAQ? (or is
it already there <G>?)

I hate hardware,
Lucky

Lucky Leavell                            Phone: (812) 945-6555
Relational Information Systems, Inc.       FAX: (812) 949-9233

New Albany, IN 47150-2013                       71534,2674 (CompuServe)
WWW Home Page:  http://www.iglou.com/ris   ftp://www.iglou.com/members/ris

Quote:>We swapped a motherboard and one hard drive in an OSR5.0.0 system and
>cannot get past a very basic problem.  I now have the system stripped down
>to the following configuration:

>    MB using INtel 430HX Chipset (supports ECC/parity memory)
>            (Model R528)

That could be the problem.

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