AWS Storage Deep Dive for Interviews | S3 vs EBS vs EFS, Replication & DR Explained

AWS Storage Deep Dive for interviews, architecture reviews, and solution design discussions. In this video, we break down Amazon S3, Amazon EBS, Amazon EFS, replication, encryption, disaster recovery, hybrid storage, and senior-level failure analysis. You will learn how to choose between object, block, and file storage, how S3 consistency works, what Cross-Region Replication actually does, why EBS is AZ-bound, when RAID is appropriate for EBS, and how EFS performance mode differs from throughput mode. This video is designed for AWS interview preparation, Solutions Architect discussions, and instructor-led cloud training. ⏱ Chapters 00:00 The Storage Interview Problem 00:45 Object vs Block vs File Storage 02:00 S3 Internals and Strong Consistency 03:20 S3 Storage Classes and Lifecycle Design 04:30 S3 Protection, Encryption, and Replication 05:40 EBS Architecture, Snapshots, RAID, and Multi-Attach 06:50 EFS Architecture and Performance Modes 07:40 Hybrid Storage, DataSync, Transfer Family, and Physical Transfer 08:30 Enterprise Data Lake and Failure Analysis 09:20 Rapid-Fire Interview Checks 09:50 Final Memory Map 🧠 Memory Map Object for scale. Block for disks. File for shared access. 🔑 Key Interview Corrections • S3 provides strong read-after-write, overwrite, delete, and list consistency. • S3 console folders are logical prefixes, not physical folders. • AWS does not recommend Reduced Redundancy Storage for new designs. • Cross-Region Replication asynchronously copies objects between buckets. It does not make one bucket operate in multiple Regions. • EBS volumes are replicated within one Availability Zone, not automatically across multiple Availability Zones. • AWS does not generally recommend RAID 1, RAID 5, or RAID 6 for EBS. RAID 0 is the documented pattern when aggregate performance is required and the workload can manage its risk. • EFS performance mode and throughput mode are separate design choices. AWS recommends General Purpose for faster per-operation performance. • Effective November 7, 2025, Snowball Edge devices are limited to existing customers. New customers should evaluate current alternatives. 📥 Download the 25-slide AWS Storage Deep Dive PPT here: https://github.com/vishnoiprem/data-e... #AWS #AmazonS3 #AWSEBS #AWSEFS #AWSStorage #CloudArchitecture #AWSInterview