Depends on what "Data durability means" - not uptime, at least. In terms of the smallest unit e.g. 1 bit, it's the equivalent of losing less than 1 bit per 117g

Depends on what "Data durability means" - not uptime, at least. In terms of the smallest unit e.g. 1 bit, it's the equivalent of losing less than 1 bit per 117gb per year (1/1e-12/8/1024/1024/1024)