EC2 Kernel Panic, fsck & Device Mismatch 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 |
|---|---|---|---|
| 5 | Kernel Panic / Root FS Mismatch | VFS: Unable to mount root fs on unknown-block(8,1) | Terminate the instance and launch a new instance using a modern kernel |
| 6 | Root Device xvda1 Does Not Exist | Unable to determine major/minor number of root device | N/A |
| 7 | Filesystem Check Forced | /dev/sda1 has gone 361 days without being checked | Wait for fsck to complete or remove fsck enforcement via tune2fs |
| 8 | Missing Device During fsck | fsck died with exit status 8 | N/A |