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up and rise to the top What does 3Ware's tw_cli mean by a “DEGRADED” disk vs “ECC-ERROR”? up vote 8 down vote favorite I've got a sad RAID array on a 3ware 9650SE-16ML card. What I can't tell is if I've just suffered a double-disk failure (bummer!) or if I'm reading this wrong. The relavent output of /c0 show all is: Port Status Unit Size Blocks Serial serial port open error --------------------------------------------------------------- p0 DEGRADED u0 931.51 GB 1953525168 5QJ07MAH p1 ECC-ERROR u0 931.51 GB 1953525168 5QJ0DCW9 p2 OK u0 931.51 GB 1953525168 5QJ0DW9C p3 OK u0 931.51 GB 1953525168 5QJ0CKXJ And the failure is (from show alarms): Ctl Date Severity Alarm Message ------------------------------------------------------------------------------ c0 [Sun Nov 20 07:47:23 2011] INFO Rebuild started: unit=0 c0 [Sun Nov 20 08:20:12 2011] ERROR Drive ECC error reported: port=1, unit=0 c0 [Sun Nov 20 08:20:12 2011] ERROR Source drive error occurred: port=1, unit=0 c0 [Sun Nov 20 08:20:12 2011] ERROR Rebuild failed: unit=0 c0 [Sun Nov 20 08:20:12 2011] INFO Rebuild paused: unit=0 I think that what happened is p0 failed, and then p1 had an ECC error (aka, my data is gone). But... maybe not? It stays at 97% rebuilt, but can't get past this error. As far as I can tell, a previous admin turned off the periodic verify, which is what got us into this state. This isn't something most people should worry about with their 3Ware RAIDs! Update After beating on it for a couple of days, I did the IgnoreECC bit and it rebuilt, but my data is hosed. Bummer. linux raid 3ware share|improve this question edited Nov 6 '12 at
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