Boot fail with LED 551

[Robert Seals]

After adding an external SCSI controller, cartridge tape, and
600m disk, then doing the 3003 update, my system is not happy.
It fails to boot with '551' on the LED. I got some hints from
my SE about why this is happening, but unfortunately the last
resort - rebuilding the system - is not an option, because the
thing won't even boot from tape.

I am about to start loading diagnostics from floppy, but I thought
that by the time that happens, somebody else might be able to
give me more clues. Please.

rob
-- 
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"Unix has its weak points, but its file system is not one of them." -Chris Torek
	  rob rob at dinner.asrc.albany.edu or rds95 at leah.albany.edu
		I have no idea what the uucp path to me is.