Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!spdcc!ima!mirror!frog!jr
From: jr@frog.UUCP (John Richardson)
Newsgroups: comp.unix.i386
Subject: Re: 1540 and sync. SCSI drives
Summary: re: It works
Keywords: SCSI AHA1540 386/ix ISC
Message-ID: <2057@frog.UUCP>
Date: 5 Oct 89 03:12:00 GMT
References: <307@dksoft.incom.de>
Organization: Charles River Data Systems, Framingham MA
Lines: 19

In article <307@dksoft.incom.de>, dirk@dksoft.incom.de (Dirk Koeppen) writes:
> Does it work to connect a synchronous (4 MB/sec) disk drive and
> an asynchronous (1.5 MB/sec) streamer onto the same SCSI bus on
> the 386/ix Adaptec 1540 controller ? Does the driver switch the
> disk drive into sync. mode or does it use both devices at async
> mode ?
> 
> 
> thanx,
> dirk@incom.de


  If you have enabled the board to allow sync. to work in the initial
setup commands, then it will do sync if the target allows it. During each
selection to a target, a bit is passed that says wether the target supports
sync mode, and the controller uses it.


				JR