Comment by 10987654321

As someone who doesn't use ECC memory for my NAS (I'm not google) I have experienced many bitflips / corruptions for some sets of photos, especially when using a NAS with what turned out to be bad ram sticks (which was recognized after switching to using ZFS and raid 10, I don't know if this saved any of my data but the setup at least made me recognize that I had a problem).