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From: ts@cup.portal.com (Tim W Smith)
Newsgroups: comp.sys.mac.programmer
Subject: Another puzzle
Message-ID: <15030@cup.portal.com>
Date: 24 Feb 89 10:15:36 GMT
Organization: The Portal System (TM)
Lines: 20

Here's another puzzle.  Suppose you have a computer with a SCSI disk
attached to that computer.  You observe the following behaviour:

	You attempt to find the SCSI id of the disk by doing
	INQUIRY commands on id's 0 to 6.  The disk responds
	to ALL of these.

	You reset the SCSI bus and do an inquiry on id 0.
	You get a unit attention condition.  You do another
	inquiry and get the correct inquiry data.

	You now do an inquiry to id 1.  You get a unit attention
	condition.

What's going on?

						Tim Smith

ps: anyone else have any weird things like this that would make interesting
puzzles?