Craig Sanders <cas@taz.net.au> writes:
e.g. a typical quoted rating of 1 error per 10^14 bits is one error per 12 terabytes - i.e. your four x 3TB array is guaranteed to have at least one error in the data.
I think more formally you'd say something like "the probability of no data errors over 12TB is not statistically significant" or something. The way you're phrasing it seems prone to misinterpretation, like saying if 25% of the global population is Chinese, then if I have four kids one of them is GUARANTEED to be Chinese.
one error in 10^14 bits is nothing to worry about with 500GB drives. it's starting to get worrisome with 1 and 2TB drives. It's a guaranteed error with 10+TB arrays....and even a single 3 or 4TB drive has roughly a 30-50% chance of having at least one data error.
^ that reads better.