EBS Block Storage in AWS The Real Usage

Amazon Elastic Block Store (Amazon EBS) provides persistent block-level storage volumes for use with Amazon EC2 instances.

Each Amazon EBS volume is automatically replicated within its Availability Zone to protect organizations from component failure, offering high availability and durability.

By delivering consistent and low-latency performance, Amazon EBS provides the disk storage needed to run a wide variety of workloads.

Persistent Block-Level Storage

In traditional IT environments, two kinds of storage dominate: block storage and file storage.

Block storage operates at a lower level—the raw storage device level—and manages data as a
set of numbered, fixed-size blocks.

File storage operates at a higher level—the operating system level—and manages data as a named hierarchy of files and folders.

Block and file storage is often accessed over a network in the form of a Storage Area Network (SAN) for block storage, using protocols such as iSCSI or Fibre Channel, or as a Network Attached Storage (NAS) file server or “filer” for file storage, using protocols such as Common Internet File System (CIFS) or Network File System (NFS).

Whether directly attached or network attached, block, or file, this kind of storage is very closely associated with the server and the operating system that is using the storage.

AWS EBS storage

The Amazon EBS service provides block level storage for Amazon
Elastic Compute Cloud (Amazon EC2) instances

EBS Special Features

Amazon EBS provides persistent block-level storage volumes for use with Amazon EC2 instances.
Each Amazon EBS volume is automatically replicated within its Availability Zone to protect you from component failure, offering high availability and durability.
Amazon EBS volumes are available in a variety of types that differ in performance characteristics and price.
Multiple Amazon EBS volumes can be attached to a single Amazon EC2 instance, although a volume can only be attached to a single instance at a time.