Apple’s new APFS file system
Addressing data integrity is a slippery slope of comparing hard drive bit read errors and ECC ram bit flips. The reality is, for things like video and pictures it probably won't be a problem. However, if the data is sensitive, you should be using a raid 6 with 2 disk redundancy, coupled with  constant data scrubbing to ensure that the disks remain bit rot free. The probability of bit rot occurring at the same place is probably less than 1 in 10^16, possibly even less if data scrubbing is constant.Here's a good article addressing bit rot: https://lockss.org/locksswiki/files/ACM2010.pdf