What is EBS? Overview Summary


What is EBS?

  • Networked block-level storage.
  • It is managed independently of EC2.
  • Even if EC2 is deleted, EBS retains data and stores Snapshot in S3
  • EBS fee is required separately from EC2.


About EBS fees


What is the maximum capacity of EBS?

Service Constraints

EBS currently supports a maximum volume size of 16 TiB.


About Volume Type

Performance comparison, price comparison


About Attach/Detach (Procedure)

EBS is a storage type that cannot be attached to multiple EC2 instances, but Multi-Attach was added in February 2020; you can enable Multi-Attach only if you are using an Amazon EBS provisioned IOPS io1 volume and A single volume can be attached to up to 16 AWS Nitro system-based Amazon Elastic Compute Cloud (Amazon EC2) instances in the same availability zone simultaneously

Multi-Attach makes it easy to increase availability for applications that manage storage consistency from multiple writers. Each attached instance has full read/write permissions to the shared volume. Applications using Multi-Attach must provide IO fences for storage consistency.


To use an EBS volume after attaching it to an EC2 instance, you must create a file system on the volume

Attaching an Amazon EBS volume to an instance exposes it as a block device.

You can format the volume with any file system before mounting.

Once an EBS volume is made available, you can access it in the same way you access any other volume.

All data written to this file system will be written to the EBS volume