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From: scott@gamma.valid.com (Scott Gustafson)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Configuring External Hard Drives
Keywords: External Hard Drive
Message-ID: <276@valid.valid.com>
Date: 21 Mar 91 18:24:39 GMT
References: <456@stubby.UUCP>
Sender: news@valid.com
Distribution: usa
Lines: 35

tom@stubby.UUCP (Tom Roehl) writes:
>Now, I know it works, because I can substitute it for
>my internal HD and get it to boot up and all.  So what I did to hook them both 
>up, was to hook the drives up in serial fashion using a SCSI cable that has
>connectors every couple of inches.  I took the original SCSI cable out, hooked
>one end of the new cable to the original connector, one of the middle connectors
>to my internal drive, and finally the other end to the new drive.  Now, when I
>boot up, the internal works fine, but I can't get the mac to recognize the
>external.

First, Have you checked the SCSI address of the new drive.  Is it set to
some number between 0 and 6 but no the same as the internal drive or any
other SCSI device?

Second, in your description of what you did, you described it like:

	+-----+      +-----+      +-----+
	| Mac |      | Int |      | New |
        |     |======|     |======|     |
	+-----+      +-----+      +-----+

So where are your terminators?  If you are going to use this config., you 
should have a terminator on the internal drive (should already be this way),
and also a terminator on the new drive.  So it should look like this:
        +-----+      +-----+
        | Mac |      | New |
        |+Int |======|+Term|
        |+Term|      +-----+
	+-----+

I hope this helps,
scott
Scott Gustafson		(408) 944-4672 me	(408) 553-8713 beeper
Valid Logic Systems, 3 West Plumeria M.S.-C1, San Jose, CA  95134
Internet:	scott@valid.com