EC2 OS/Kernel Symptom Diagnostic Troubleshooter (Part 6)
Use the interactive troubleshooter below to identify your EC2 OS/kernel 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 |
|---|---|---|---|---|
| 4 | Slow initial write operations on SSD-based instance store volumes | N/A | Due to Amazon EC2 disk virtualization, the first write to any location on uninitialized instance store volumes performs more slowly than subsequent writes. | dd if=/dev/zero of=/dev/sdb bs=1M |
| 5 | Software-based RAID array initialization or reconstruction is operating too slowly | /proc/sys/dev/raid/speed_limit_min | The default minimum reconstruction speed for software-based RAID limits initialization throughput. | echo $((30*1024)) > /proc/sys/dev/raid/speed_limit_min |