What You See:
- Rebuild begins but stalls at 0% or a low percentage
- No drive lights blinking to indicate activity
- Controller still reports “Rebuilding” status
What It Likely Means:
- One of the “good” drives has unreadable sectors (silent failure)
- The replacement drive is incompatible or incorrectly initialized
- Controller parity verification failed but wasn’t reported
What NOT To Do:
- Don’t assume it just needs time — stalled rebuilds often never complete
- Don’t swap in another drive without mapping original layout
- Don’t reboot mid-rebuild — it can freeze config or corrupt metadata
What You CAN Do:
- Run SMART tests on all drives — not just the failed ones
- Snapshot the RAID config and parity layout with JeannieLite
- Review controller logs to pinpoint parity mismatches or I/O errors
In RAID 6, silent sector errors break parity just as fast as failed disks. Let us analyze before the controller does damage.