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From: fozzard@boulder.Colorado.EDU (Richard Fozzard)
Newsgroups: comp.sys.mac.hardware
Subject: Can the SCSI bus be terminated w/o powering up noisy device?
Message-ID: <17008@boulder.Colorado.EDU>
Date: 15 Feb 90 19:22:59 GMT
Sender: news@boulder.Colorado.EDU
Reply-To: fozzard@boulder.Colorado.EDU (Richard Fozzard)
Organization: University of Colorado, Boulder
Lines: 22

A question for you SCSI jocks out there:

I recently got a Syquest drive (Ehman) that I only need occasional access
to. Its fan is painfully loud, so I would like to leave it powered down
when not in use. However, I cant do this since my SE/30 with internal
Sony 40 meg wont boot if the SCSI cable is connected, but the external
drive is powered down. Presumably, the termination resistors in the
Ehman require power to work.

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.

If you really understand SCSI termination, a reply to the net would 
probably be widely appreciated, since to most of us SCSI termination
is black magic.

Thanks for any help - rich
========================================================================
Richard Fozzard					"Serendipity empowers"
Univ of Colorado/CIRES/NOAA	R/E/FS  325 Broadway, Boulder, CO 80303
fozzard@boulder.colorado.edu                   (303)497-6011 or 444-3168