All 7 Amazon EFS (Elastic File System) questions
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What is Amazon EFS and how is it different from Amazon S3 or EBS? What are the different storage classes available in EFS? How do EFS mount targets work across multiple Availability Zones? How can you control access permissions for files and directories stored in EFS? How does EFS integrate with AWS Lambda and containerized workloads like ECS? What performance modes and throughput modes are available in EFS, and how do you choose between them?
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How does EFS ensure data durability and availability?

Intermediate

Answer

EFS Standard storage automatically stores data redundantly across multiple Availability Zones within a region, meaning your files remain available and durable even if an entire Availability Zone becomes unavailable, and this replication happens transparently without requiring any additional configuration from you as the user.
aws efs describe-file-systems --file-system-id fs-12345678
Real-world example A healthcare application relies on EFS's built in multi Availability Zone redundancy to guarantee that critical patient record files remain accessible even during a localized data center disruption in one Availability Zone.

Common follow-ups: What durability guarantee does AWS provide for EFS Standard storage?;How does One Zone storage differ in terms of durability?

AWS Backup & Disaster Recovery;S3 & Storage
All 7 Amazon EFS (Elastic File System) questions