**Root Cause Found**: All 6 NVMe SMART failures were due to parsing bug!
Ceph's `device query-daemon-health-metrics` returns data in nested format:
```json
{
"DEVICE_ID": {
"nvme_smart_health_information_log": { ... }
}
}
```
Script was checking for `nvme_smart_health_information_log` at top level,
so it always failed and fell back to SSH smartctl (which also failed).
**Fix**:
- Extract first device entry from nested dict structure
- Maintain backward compatibility for direct format
- Now correctly parses NVMe SMART from Ceph's built-in metrics
**Expected Impact**:
- All 6 NVMe drives will now successfully read SMART data
- Should drop from "CRITICAL: No SMART data" to proper health scores
- Only truly healthy NVMe drives will show 100/100 health
- Failing NVMe drives will be properly detected and ranked
**Testing**:
Verified `ceph device query-daemon-health-metrics osd.0` returns full
NVMe SMART data including:
- available_spare: 100%
- percentage_used: 12%
- media_errors: 0
- temperature: 38°C
This data was always available but wasn't being parsed!
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
