Path: utzoo!utgpu!water!watmath!clyde!att!pacbell!ames!mailrus!uflorida!gatech!hubcap!robert
From: robert@hubcap.UUCP (Robert Reynolds)
Newsgroups: comp.sys.amiga.tech
Subject: SCSI vs. ST506, and DMA
Keywords: SCSI ST506 HD DMA
Message-ID: <2268@hubcap.UUCP>
Date: 22 Jul 88 14:21:51 GMT
Organization: Clemson University, Clemson, SC
Lines: 25

There seem to be two kinds of hard disk controller for the Amiga:  SCSI
and ST506.  I've been told that SCSI has a much greater transfer rate
than does 506, but that I'm unlikely to see much benefit from that
unless I have a controller with DMA.  Apparently there aren't any 1000
controllers with DMA?  But there are a number of companies working on
expansion boxes for the 1000 that will accept A2000 cards.

I'd like any information you care to provide on this whole situation,
but particularly:

	Are there really no SCSI controllers with DMA for the 1000?
	Why not?

	Will 2000-compatible cards plugged into the new expansion boxes
	be "crippled" somehow because they're not really directly on a
	2000 bus?  (And if not, I really don't understand why somebody
	hasn't done one directly for the 1000.)

Thanks for any info or discussion you can provide.


-- 
Robert Reynolds                 uucp: ... !gatech!hubcap!robert
CS Dept, Clemson Univ.    	ARPA: ROBERT@TECNET-CLEMSON.ARPA
phone: (803) 656-5884           inet: robert@hubcap.clemson.edu