High end SATA and SAS disks claim MTBF values that work out to over 100 years, and yet it is a common observation that certain models fail at rates entirely inconsistent with those values. For instance, 75% of all drives of one model dead in < 6 years. (Cited by one poster in this thread:
https://groups.google.com/forum/#!topic/comp.unix.solaris/zQjoyc8T01Y ). Additionally, manufacturer warranties at best only go to 5 years, which suggests the manufacturers don't have a whole lot of faith in their MTBF values. Some of you have huge amounts of storage, how many disk models lasted as long as their MTBF suggests they should? (Personally we have only one set of disks that are still consistent with the claimed MTBF, a set of 6 Fibre Channel disks that came with a Sun server and are now 10 years old - with no failures.) How do they come up with the MTBF values for disks anyway? Clearly it is not based on watching a large sample of disks for countless years! Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
