EC2/EBS Quota & Limit Diagnostic Troubleshooter (Part 1)
Use the interactive troubleshooter below to identify your EC2/EBS quota or limit symptom, review the raw evidence, understand the root cause, and apply the recommended fix.
🚨 Step 1: What specific error symptom are you experiencing?
Please click the most accurate description:
Quick Reference Table
| # | Scenario | Key Error Signal | Root Cause | The Fix |
|---|---|---|---|---|
| 1 | EBS Snapshot Copy Concurrency Limit | ResourceLimitExceeded error / "There is a limit of 20 concurrent snapshot copy requests per destination Region." | An automation script or backup process initiated more than 20 snapshot copy requests to a single destination Region simultaneously. | Wait for one or more of the copy requests to complete before making a new snapshot copy request. |
| 2 | Concurrent Snapshot Creation Limit | ConcurrentSnapshotLimitExceeded error / "limit of one pending snapshot for a single st1 or sc1 volume, or five pending snapshots for a single volume of the other volume types" | The system attempted to create multiple snapshots of the same EBS volume concurrently before previous snapshots transitioned out of the pending state. | Wait for one or more of the pending snapshots to complete before creating another snapshot of that volume. |
| 3 | S3 Store/Restore AMI Capacity Quota | "The sum of the sizes of all the AMIs in progress is limited to 600 GB... Quota on restore image requests: 300 GB of restore work (snapshot data) in progress." | Bulk storing or restoring AMIs via S3 exceeded the 600 GB (store) or 300 GB (restore) concurrent snapshot data limits per account, causing new tasks to be rejected. | N/A |
| 4 | T2 Launch Credit Soft-Limit Breach | "The default limit is 100 launches or starts of all T2 Standard instances combined per account, per Region, per rolling 24-hour period." | Rapid stopping and starting of T2 Standard instances (e.g., in an aggressive Auto Scaling loop) exhausted the launch credit allocation limit, preventing new instances from bursting at startup. | Switch to Unlimited mode for burstable performance instances or consider using a larger instance size. |