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To: Charles Tutt who wrote (17341)	6/25/1999 1:39:00 AM
From: Stormweaver	Read Replies (1) of 64865

The magic 200 hours comes from EBAY's weekly 4 hour downtime; 52 weeks times 4 = 208 hours. This is scheduled downtime ... some business' cannot afford to have any downtime. Therefore achieving true 5-9's requires having your system up 8759.13 hours out of 8760 hours per year; down 52.2 minutes/annum. NT wouldn't have done better, but, 3-9's is about as good as a UNIX or NT box will ever get ... all non-fault tolerant machines need to be periodically shutdown/maintained etc. Any attempt to guarantee 5-9 or better uptime in a NT or UNIX Server environment is a only a marketing ploy.

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