funsec mailing list archives
Re: Database design.
From: Drsolly <drsollyp () drsolly com>
Date: Wed, 7 Jun 2006 00:18:45 +0100 (BST)
On Tue, 6 Jun 2006, Blue Boar wrote:
Drsolly wrote:And you think that's the MTBF you'll get under your use conditions, huh?Yes.Really? OK, so here's the possibilities I see. Please pick one or tell me what I missed: -You know precisely what Maxtor's testing conditions are, and those happen to exactly match the conditions under which you use your drive. -Maxtor is actually being conservative, and their 1.2M hr claim reflects typical field usage. Marketing claims be damned, they're going to tell the truth. -You've done your own study on the 1.2M hr drives, and came up with the same numbers(Are you're sure that's not the MTBF for drives that aren't powered on?)If you don't power a drive on, it never fails, so the mtbf is infinite.Oh, I don't know. I think I could look at a drive that had never been powered on, but rusted through after the first 50 years, and declare it failed. See, when they publish a MTBF number, I tend to assume that they did things like tested with a constant temperature in a vibration-free environment, extrapolated beyond what they should have with the sample size and length of test, and then failed to publish the margin of error. But then, I've been accused of being a pessimist.
Pessimism is good when you're in security. _______________________________________________ Fun and Misc security discussion for OT posts. https://linuxbox.org/cgi-bin/mailman/listinfo/funsec Note: funsec is a public and open mailing list.
Current thread:
- Re: Database design., (continued)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Dude VanWinkle (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Brian Loe (Jun 07)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Andrew (Jun 06)