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What Is Amazon EBS and How to Attach It to an EC2 Instance

Learn what Amazon EBS is, how block storage works in AWS, and how to create and attach EBS volumes to EC2 instances step-by-step.

Updated
2 min read
What Is Amazon EBS and How to Attach It to an EC2 Instance
G
AWS Solutions Architect passionate about AWS, Terraform, DevOps, and cloud automation. Sharing real-world cloud engineering knowledge, troubleshooting guides, infrastructure solutions, and practical DevOps learning.

Introduction

Amazon EBS is a block storage service provided by AWS for EC2 instances.

It is mainly used to store operating systems, application data, databases, and persistent storage for cloud servers.

What Is Amazon EBS?

Amazon EBS (Elastic Block Store) is a block-level storage service designed for Amazon EC2.

EBS volumes work like virtual hard disks attached to EC2 instances.

Why Is EBS Important?

EBS provides:

  • persistent storage

  • high availability

  • scalability

  • backup support

  • fast performance

Types of EBS Volumes

General Purpose SSD (gp3)

Balanced price and performance.

Provisioned IOPS SSD

High-performance workloads like databases.

Throughput Optimized HDD

Large data workloads.

How EBS Works with EC2

An EBS volume is created separately and attached to an EC2 instance.

The EC2 instance uses the EBS volume like a physical hard disk.

Steps to Attach EBS to EC2

Step 1

Create EC2 instance.

Step 2

Open EBS volumes section in AWS console.

Step 3

Create new EBS volume.

Step 4

Select:

  • size

  • volume type

  • availability zone

Step 5

Attach volume to EC2 instance.

Step 6

Login to EC2 and mount the volume.

Benefits of EBS

  • Persistent storage

  • Snapshot backup support

  • High durability

  • Easy scalability

  • Encryption support

Real-World Example

A production application running on EC2 stores application data and logs inside EBS volumes for persistent storage.

Conclusion

Amazon EBS is an important AWS storage service used with EC2 instances to provide scalable and persistent block storage.

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