Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!shlump.dec.com!FSCORE.dec.com!kaye
From: kaye@FSCORE.dec.com
Newsgroups: comp.sys.amiga
Subject: RE: A2000 DMA SCSI disk controllers: What's the final word?
Message-ID: <2639@shlump.dec.com>
Date: 31 May 89 16:52:38 GMT
Sender: news@shlump.dec.com
Organization: Digital Equipment Corporation
Lines: 18

I have a A2000 + df1: - it worked fine

Added 2090A and (2) Seagate 412's - flakey
Added MEGAboard 2000 (2M) - couldn't write to harddrives without system crash

Called CBM (Canada) - maybe Signetics 68000 - swapped - no change

Finally had a friend bring his A2000 + 2090A + 2058 over. Found ECO on the 
4.4 motherboard (a resistor on U604). Installed a same resisitor on my machine
& everything works fine. Called CBM & they confirmed the ECO as required if 
expansion slots are used. Machine has been solid ever since. 
Note - 2090A cannot boot from FFS - so i have a 300k partition in OFS and 
transfer control to the large FFS partition. The main advantage of the
2090A is it can handle 2 ST506 drives & SCSI devices. The ST506 drives are 
cheaper and still quite fast. The Seagate 412's are old 10M slow drives, but
i get good numbers from Diskperf & Devspeed.

 mark (Happy 2090A owner)