Paul G. Allen wrote: > No matter what safeguards are put in place, no file system is ever going > to be 100% safe from corruption from a power interruption. I spent years > on trying to bet embedded file systems as close to 100% safe as > possible. There is always going to be some case where something gets > corrupted when power drops at the wrong time. > > The best solution is to keep writes as short as possible (including > writes to the journal). There is going to be some point in the design > and development where the engineer must make the best compromise between > performance and reliability. Shorter writes mean lower performance and > higher reliability. Longer writes mean higher performance and lower > reliability. A write cache in volatile memory (which is what you have on > a hard drive) is always going to be a huge reliability hit, but a huge > performance gain in comparison.
I think this has been asked elsewhere, and probably more than once, but I wonder why drives cannot save the cache during the power-down ramp. I guess hybrid drives are another solution to this problem, eh. Regards, ..jim -- KPLUG-List@kernel-panic.org http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
