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To: Alomex who wrote (15868)7/21/1998 12:48:00 PM
From: soup  Read Replies (1) of 213177
 
NT glitches leave Navy "Smart Ship" dead in the water.

>There is very little segregation of error when software shares bad data," DiGiorgio said. "Instead of one computer knocking off on the Yorktown, they all did, one after the other. What if this happened in actual combat?"

The Yorktown lost control of its propulsion system because its computers were unable to divide by the number zero, the memo said.

The Yorktown's Standard Monitoring Control System administrator entered zero into the data field for the Remote Data Base Manager program. That caused the database to overflow and crash all LAN consoles and miniature remote terminal units, the memo said.

"If you understand computers, you know that a computer normally is immune to the character of the data it processes," he wrote in the June U.S. Naval Institute's Proceedings Magazine. "Your $2.95 calculator, for example, gives you a zero when you try to divide a number by zero, and does not stop executing the next set of instructions. It seems that the computers on the Yorktown were not designed to tolerate such a simple failure."<

gcn.com

ROFL LOL
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