Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!yale!mintaka!chaos.cs.brandeis.edu!dan
From: dan@chaos.cs.brandeis.edu (Dan Schwarz)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Can the SCSI bus be terminated w/o powering up noisy device?
Message-ID: <1990Feb15.204213.29062@chaos.cs.brandeis.edu>
Date: 15 Feb 90 20:42:13 GMT
References: <17008@boulder.Colorado.EDU>
Organization: Brandeis University Computer Science Dept
Lines: 26

In article <17008@boulder.Colorado.EDU> fozzard@boulder.Colorado.EDU (Richard Fozzard) writes:
>A question for you SCSI jocks out there:
>Is there any way to terminate the SCSI bus correctly w/o powering up
>that damned noisy Ehman? It does have a 2nd SCSI (25-pin) connector on
>the back, and it is the only external SCSI device.
>

That's really odd - most of the SCSI devices I have worked with that are
internally terminated, did not require power when the computer was operating.

One possible solution is to remove the internal termination resistors, then
add an external SCSI pass-through terminator.  These are generally available
for the 50-pin centronics SCSI connectors, but I've never looked for one which
uses Mac-standard 25 pin SCSI.

Another solution might be to replace the noisy hard disk fan with a quieter
fan., or add some kind of thermostatic switch to control the fan (there is
such a device available to quiet noisy SE fans - it switches the fan on when
the temperature reaches a certain level.)


-- 
| And the men who hold | Dan Schwarz, MB 2926 Brandeis U. | RECYCLE YOUR JUNK |
| high places/ Must be | I'NET dan@chaos.cs.brandeis.edu  | SUPPORT EARTH DAY |
| the ones to start/   |----------------------------------| tradetapes?mailme |
| To mould a new reality/ Closer to the heart  ...  RUSH  | FloydRushDeadEtc..|