warren_briones Posted June 5, 2019 Share Posted June 5, 2019 I have two 6TB hdds, and two 1TB ssds for cache. What I would like to know is if one 6TB will be in the array and the other 6TB is for parity, will rebuilding be possible if the arrayed 6TB fails? If yes, how long would it take to rebuild? Quote Link to comment
Frank1940 Posted June 5, 2019 Share Posted June 5, 2019 Yes!!! (that is the whole purpose of have a parity protected array.) The time required would be about the same as required for a parity check. Quote Link to comment
testdasi Posted June 5, 2019 Share Posted June 5, 2019 3 hours ago, warren_briones said: I have two 6TB hdds, and two 1TB ssds for cache. What I would like to know is if one 6TB will be in the array and the other 6TB is for parity, will rebuilding be possible if the arrayed 6TB fails? If yes, how long would it take to rebuild? Just for educational purpose, what you are having (2x6TB only) is strictly not parity but mirror (similar to how 2x1TB SSD in the cache are mirrored by default). Parity is when you have 3+ disks. You are protected a single failure in both (single) parity and mirror but the subtle diff is what the "parity" disk contains. If my parity goes kaput, I can safely throw it away without any worry because there's no way anyone can reconstruct my personal data from that parity alone. A mirror "parity" however will require a wipe because it's a mirror. Quote Link to comment
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