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- Newsgroups: sci.space
- Path: sparky!uunet!van-bc!cs.ubc.ca!news.UVic.CA!sol.UVic.CA!borden
- From: borden@sol.UVic.CA (Ross Borden)
- Subject: shuttle computers
- Message-ID: <1992Nov21.192902.2926@sol.UVic.CA>
- Sender: news@sol.UVic.CA
- Nntp-Posting-Host: sol.uvic.ca
- Organization: University of Victoria, Victoria, B.C. CANADA
- References: <By2xE4.BnH.1@cs.cmu.edu>
- Distribution: sci
- Date: Sat, 21 Nov 92 19:29:02 GMT
- Lines: 29
-
- >-Do the GPC's have hard drives?
-
- >I'm virtually certain they don't. Hard disks *are* used in personal
- >computers on the Shuttle (after all, they're mighty convenient),
- >but they don't have anywhere near 5000 hours MTBF under the conditions
- >in the Shuttle. (As I said before, one hard drive on a personal computer
- >seized up on the last flight.)
-
- >-If so, how do they guard against
- >-shock, vibration, etc?
-
- >-| rborden@ra.uvic.ca |
-
- >I would guess that they're powered down during launch and landing. (There
- >could well be military disk drives that would have a better chance to work
- >under those conditions, but even those would be likely to reduce the
- >reliability of the GPCs if used in them.)
-
- >John Roberts
- >roberts@cmr.ncsl.nist.gov
-
- Do you have any references on the shuttle computers? I'd be
- interested to find out what kind of fault tolerance they have.
-
- -------------------------------------------------------------------------------
- "I'd rather have an apendectomy with a burning spatula."
- rborden@ra.uvic.ca
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