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Path: utzoo!utgpu!water!watmath!clyde!ima!spdcc!dyer
From: dyer@spdcc.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: weird disk problem (and motherboard, too?) on AT
Message-ID: <89@spdcc.COM>
Date: Sat, 30-May-87 00:56:40 EDT
Article-I.D.: spdcc.89
Posted: Sat May 30 00:56:40 1987
Date-Received: Sat, 30-May-87 12:10:30 EDT
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 26

I moved two hard disks from an AT clone to a genuine AT -- problem is
that after the POST, the drive light goes on for about 2-3 minutes,
it times out with a
1790 - Drive error 0
Hit F1 to continue
and then hitting F1 without a floppy in the drive accesses the boot code
on drive 0 and XENIX comes up without any problems whatsoever.  If I put
a DOS or diagnostics disk into the floppy, it either hangs (never returns
after reading a few sectors) or gives a
PARITY CHECK 1
00000 (S)

This is something I can't understand; the POST passes its memory tests
(all the way up to 6mb), and the drives have been moved intact, cables
and all.  I even tried both the clone's and the IBM's disk controller--
no difference.  Both drives have the correct hardware types (embellished
by the Golden Bow DUB-14 ROMs with their additional drive tables.)
Both machines were running impeccably before being touched.  XENIX
seems to be doing fine, so it's more of an annoyance than a real problem,
but I'd like to get to the bottom of it.


-- 
Steve Dyer
dyer@harvard.harvard.edu
dyer@spdcc.COM aka {ihnp4,harvard,linus,ima,bbn,halleys}!spdcc!dyer