Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ames!sun-barr!decwrl!vaxphw.dec.com!phil
From: phil@vaxphw.dec.com (At 'MAC'simum efficiency!  01-Sep-1989 1104)
Newsgroups: comp.sys.mac
Subject: SCSI termination problem-really wierd!
Message-ID: <8909011634.AA28632@decwrl.dec.com>
Date: 1 Sep 89 16:34:10 GMT
Organization: Digital Equipment Corporation
Lines: 41

Hi World....

I just recently installed yet another HD to my MAC (My third) and now I have 
a problem.

Unless the new disk is turned on, my system will just flash the 'waiting for
a disk to boot' question mark.

Now, my setup is kind of unstandard and looks like this:

Mac II, 5 meg
                        SCSI ID=2             SCSI ID=0
                       +-----------+      +------------------------+
                       |           |      |                        |
--------------+   +----+HD#1-------+------+Apple 80 Internal       |
Mac   Internal|   |    |Not        |      |(Apple terminates this) |
      SCSI    +===+    |Terminated |      +------------------------+
              |        +-----------+
      External|
      SCSI    +===+   +----------+   +------------+  +-----------+ 
              |   |   |          |   |            |  |           | +-----------+
--------------+   +---+HD#2      +---+Tape Backup +--+Apple CDROM+-+Termination+
                      |Not       |   |   Not      |  |    Not    | | Pack      |
                      |Terminated|   | Terminated |  | Terminated| +-----------+
                      +----------+   +------------+  +-----------+
                       SCSI ID=5      SCSI ID=1        SCSI ID=3 


termination Pack is the little thing you plug into the last device on your bus
in the devices second scsi connector.

The Apple CDROM unit is always on, and up to now, I can leave the Tape
backup unit and the disk above marked HD#1 off with no problem.

But for some reason HD#2 must be ON for the system to work....

I boot off of the Apple 80meg internal.

Any ideas?

Phil Hunt