Path: utzoo!attcan!uunet!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpl-opus!hpnmdla!dan
From: dan@hpnmdla.HP.COM (Dan Pleasant)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Mac SCSI Drive Tale of Woes
Message-ID: <7500002@hpnmdla.HP.COM>
Date: 30 May 90 15:36:03 GMT
References: <60054@lll-winken.LLNL.GOV>
Organization: HP Network Measurements Div, Santa Rosa, CA
Lines: 24


>[Huge description of SCSI woes by deboni@fernando.llnl.gov deleted]
>
>Be aware when connecting non-Mac SCSI drives to a Mac that the
>Mac does NOT supply termination power.  If the device in question
>expects to get its termination power from the SCSI connector,
>you will have many potential problems.  One way to test for this
>setup is to stick a Mac-specific peripheral at the end of the
>SCSI chain.  Since it should be terminated properly (without
>relying on the connector's termination power), everything will
>work fine.  If you place the non-Mac device at the end of the chain
>and things stop working, you might be experiencing the aformentioned
>termination power problem.
> 
>-- Jeff Kuskin, Dartmouth College
 
----------

Having had recent experience with just this problem, I can assure you 
that the Mac IIfx *does* supply termination power, and the Mac Portable
*does not*.  I can't speak about the other models with certainty, but
I think they do supply termination power.

Dan Pleasant