When Something Feels Off — Your First Step to Clear Answers
RAID 6 is designed to be fault-tolerant — able to survive two drive failures. But when things go wrong, it’s usually not because the system failed… it’s because the rebuild did.
Silent sector errors, out-of-sync parity, or mistaken drive swaps can all cause RAID 6 arrays to fail in ways that look recoverable — until they’re not.
This page is your safe starting point.
We’ll walk you through what symptoms mean, what not to try on your own, and when to let ADR step in.
RAID 6 Triage Pages
We’ll walk you through what symptoms mean, what not to try on your own, and when to let ADR step in.
- RAID 6 Failed But Only One Drive Died
- Foreign Config Detected on RAID 6 — Import or Not?
- RAID 6 Virtual Disk Not Detected After Power Loss
- Rebuild Won’t Start After Second Drive Swap
- RAID 6 Rebuild Stuck — No Progress, No Errors
- Recreated RAID 6 — But Files Are Missing or Corrupt
- RAID 6 Degraded, Then Crashed — What Happened?
Technical Note TN-R6-001
Title: RAID 6 Dual-Failure, Rebuild Stalls, and Metadata Desynchronization
This in-depth note explains what happens inside the controller when parity math fails — from latent sector errors to NVRAM epoch drift. It’s the internal reference behind every RAID-6 page in this series.
- Dual-Failure Surfaces That Break Two-Drive Safety
- Rebuild Stalls and Second Disk Drops
- Virtual Disk Missing After Rebuild
- Rebuild Won’t Start After Replacement
- Array Online but Empty
- Forensic Triage — Order of Operations
Read the Full Technical Note TN-R6-001 →