Re:AWS Says It Can't Restore Some Data from Mideast Faciliti...
by cyberax on Thursday September 17, 2026 @01:36PM
(#49744005)
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.
But when I put data on normal S3, isn't my money supposedly paying for triple redundancy?
Look, here's the documentation: https://docs.aws.amazon.com/AmazonS3/latest/userguide/DataDu...
"S3 Standard, S3 Intelligent-Tiering, S3 Standard-IA, S3 Glacier Instant Retrieval, S3 Glacier Flexible Retrieval, and S3 Glacier Deep Archive redundantly store objects on multiple devices across a minimum of three Availability Zones in an AWS Region. An Availability Zone is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region."
As far as I've heard before that's not with parity and three zones means three copies. But when I search now I see things about 5+4 parity, any insight here?