TN-R6-005 — Why Rebuild Retries Are Especially Dangerous in RAID 6
Author: ADR Data Recovery
0. Purpose and Scope
This note explains why repeated rebuild attempts rapidly destroy RAID 6 recoverability.
1. Partial P/Q Stripe Writes
- Rebuilds rewrite parity incrementally.
- Aborts leave parity epochs mismatched.
2. Retry Compounding Effect
- Each attempt overwrites more stripes.
- Earlier parity evidence is erased.
3. False Success Signals
Partial rebuild progress often masks irreversible parity divergence.