EC2 EBS Volume & Snapshot Failure Diagnostics

Data strictly extracted from official AWS troubleshooting documentation. Click the symptom below to get the targeted CLI remediation commands.

🚨 Step 1: What specific error symptom are you experiencing?

Please click the most accurate description:

---

Quick Reference Table

#	Scenario	Key Error Signal	Primary Fix
1	Instance Hung — NMI Required	kernel.unknown_nmi_panic=1 pre-configured	aws ec2 send-diagnostic-interrupt --instance-id <id>
2	EBS Volume Stuck in busy	"State": "busy" on detach	sudo umount -d /dev/sdh before detaching
3	Snapshot Creation Limit	ConcurrentSnapshotLimitExceeded	Wait for pending snapshots to complete (hard limit: 1 for st1/sc1, 5 for others)
4	Snapshot Copy Region Quota	ResourceLimitExceeded	Wait or request quota increase (hard limit: 20 concurrent copies per region)
5	Fast Snapshot Restore Capacity	Server.InsufficientCapacity	Retry in alternate AZ or wait for capacity to free up