🔹 What is an EBS Volume?
Elastic Block Store (EBS) is a network-attached storage for EC2 instances.
Allows data persistence even after an EC2 instance is terminated.
Single attachment per volume at CCP level — one EBS volume can only be attached to one instance at a time.
Bound to a specific Availability Zone (AZ).
Think of it like a network USB stick — can be attached/detached over the network.
🔴 CCP - Certified Cloud Practitioner - one EBS can be only mounted to one EC2 instance
🟢 Associate Level (Solutions Architect, Developer, SysOps): “multi-attach” feature for some EBS
⚡Key Characteristics
Feature | Description |
|---|---|
Network-attached | Communicates over the network, may have slight latency |
Detachable | Can detach from one instance and attach to another in the same AZ |
Provisioned | Specify capacity (GB) and IOPS at creation |
Expandable | Capacity and performance can be increased over time |
Snapshots | Can create snapshots to move data across AZs |
🖥 EBS Volumes & EC2 Integration
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<strong>Same AZ only</strong> — a volume can attach only to instances inside its own Availability Zone, and unattached volumes still get billed.
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});✅ A single EC2 instance can have multiple EBS volumes attached.
❌ An EBS volume can only be attached to one EC2 instance at a time (Cloud Practitioner level).
🔄 EBS volumes can be detached from one instance and attached to another whenever needed.
💾 You can also keep an EBS volume unattached until you're ready to use it.
🗑 Delete on Termination
Controls whether an EBS volume is automatically deleted when its attached EC2 instance is terminated.
✅ Root volume: Enabled by default — deleted along with the EC2 instance.
❌ Additional EBS volumes: Disabled by default — preserved even after the instance is terminated.
💾 Disable Delete on Termination if you want to keep the data for future use. volumes