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From: KREISEL@MIT-ALCATOR (Felix Kreisel)
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Message-ID: <8512130918.AA14564@ucbvax.berkeley.edu>
Date: Thu, 12-Dec-85 15:56:18 EST
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	HSC V2.50 - POSSIBLE BUG
I have a 780-750 cluster with two HSC RA81 disks and three local disks on the
780.  I just received my 2.50 upgrade and was running TUCOPY on the HSC50.
At the same time as TUCOPY was running I issued a "$show devices d" command
on the 780.  The status of the three local disks was displayed, then all of a
sudden the HSC crashed.
	The crash has not recurred under the same conditions, I tried a dozen
times.   I wonder whether anyone else has seen this problem, whether this was 
just a coincidence or a definite HSC interrupt handling problem.
			Felix Kreisel
			MIT Plasma Fusion Center
			Cambridge, Mass.