• Rebuild started, but no progress
  • Stuck at “0%” indefinitely
  • Controller may say “rebuilding,” but nothing changes
  • Drive mismatch: new disk doesn’t match original sector layout
  • Silent read error on source disk
  • Controller can’t verify parity rebuild path
  • Don’t abort and swap in another drive
  • Don’t reboot mid-rebuild
  • Don’t force a new rebuild unless root cause is known

A rebuild that won’t move isn’t just frozen — it’s confused. Let us interpret what the controller can’t tell you.