Given this formula how do you calculate the following? I don't understand, can some one explain?                      1MTTF(System) = ------------------------           [Summation]      1                       ------------                          MTTFi       (was going to upload an image of the formula but they don't let me)A 10 TB disk drive has an MTTF of 6,000,000 hours.  How much data can we store in a system comprised of these disks, if we want the system MTTF to be at least 1.2M hours?If we are allowed to make it redundant (i.e., two of them operating in a parallel mode), and if the MTTR is 120 hours, what is the system MTTF?
Mean time to failure calculation help
computer architecture