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From: gsteckel@vergil.East.Sun.COM (Geoff Steckel - Sun BOS Hardware CONTRACTOR)
Newsgroups: comp.sys.amiga.hardware,comp.periphs.scsi
Subject: Re: cabling
Message-ID: <4005@eastapps.East.Sun.COM>
Date: 22 Jan 91 17:15:11 GMT
References: <2331.AA2331@caleb>
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Reply-To: gsteckel@east.sun.com (Geoff Steckel - Sun BOS Hardware CONTRACTOR)
Followup-To: comp.sys.amiga.hardware
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Organization: Omnivore Technology, Newton, Mass. (617)969-3448
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In article <2331.AA2331@caleb> jdp@caleb.UUCP (Jim Pritchett) writes:

>I asked about putting my internal SCSI drives into an external box (Mini
.....[list deleted]....
>Anyway, I guess that I'll use a straight through DB-25 cable to connect the
>A2090 to the drive case.  Then I'll make a DB-25 to 50 pin connector cable
>to attach it to the drives.

I'd strongly advise against doing this.  The SCSI signals really need at least
alternate grounds; twisted pairs are better.  If you make the DB-25 to 50 pin
cable adapter, put it at the Mac end, as close as possible to the DB-25.
(Using the DB-25 violates the SCSI standard, but who cares about standards
....(:-)....)  Use twisted pair (or twist'n'flat) if you're going to run more
than a foot or two - this is both to protect your data and your peace.  The
SCSI cable will radiate a lot of RF to any nearby receiver if it isn't shielded.

	geoff steckel (gwes@wjh12.harvard.EDU)
			(...!husc6!wjh12!omnivore!gws)
Disclaimer: I am not affiliated with Sun Microsystems, despite the From: line.
This posting is entirely the author's responsibility.