Yes, normal S3 is at least triply-redundant. But it's possible for S3 to lose some data if two DCs are down and a disk dies in the single remaining DC. AWS doe

Yes, normal S3 is at least triply-redundant. But it's possible for S3 to lose some data if two DCs are down and a disk dies in the single remaining DC. AWS doesn't use parity for S3, they actually mirror the data.