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Lisp stopped itself (still)

    Date: Wed, 18 Sep 1991 03:22 EDT
    From: Peter Paine <p2@porter.asl.dialnet.symbolics.com>

	Date: Tue, 17 Sep 1991 16:58-0000
	From: barmar@Think.COM (Barry Margolin)

	    Date: Tue, 17 Sep 1991 11:15 EDT
	    From: Scott_Busse%mindlink.bc.ca@Warbucks.AI.SRI.COM (Scott Busse)


	    Test disks
	    Label for unit 0: 1635 cylinders, 15 heads, 24 pages/track,
	     Id = 0, Fast mode = 1, Root at 30(8)
	    Pack name: DE-00355
	    Testing disk unit 0
	    Testing heads
	    Testing cylinders
	    Error reading cylinder 1635 head 0 sector 0 on unit 0
	    Too many retries for unit 0. Last error was: Timed out waiting for
	     seek to cylinder 1635
	    (there appears to be 1635 cylinders)
	    Testing sectors
	    Error while mounting unit 1: Select error on unit 1 during unit
	    (* This last line was repeated for units 2,3,4,5,6,7 since there's
	    (* only 1 drive I suppose.
	    (* It seems that that last cylinder should have been omitted at
	    (* format time.?

	You can ignore that error, it always happens.  For some reason, Test
	Disks always tries to access one extra cylinder (maybe it's just
	verifying the information in the label).

    >From my experience, it only tests one extra if the initial disk setup
    was wrong. When show disk types says there are 1635 cylinders, one
    answers Format .. 0 through 1634. If you say 0 through 1635, you get the
    above error (ie. count from 0 a la DO).

I've seen it on original Symbolics disks, and I think also on disks I've
formatted myself.  I know I always say 0 through N-1, and I hope
Symbolics does as well.