October 11, 201015 yr Hi All, I had a power outage last week and my unraid server went down :-( When I rebooted and ran the parity sync, it failed with write errors to the parity drive, so I stopped the array and removed the disk and ran a HDD regeneration program on it to repair the bad sectors. Then I put the disk back in and restarted the server. But, when I restarted the array, the parity drive had a blue ball next to it and it said that it was a new parity drive, and also one of the other disks in the array came up as unformatted. I didn't notice the other disk as unformatted at first and had restarted the parity sync, but stopped it before it even reached 0.5% complete. My question:- Is my data lost on the drive that said unformatted? And second question:- Why did the parity drive come up as new drive? It wasn't formatted and it was the exact same drive that was reinstalled as the parity drive. Just an edit to let you all know I am using 4.5.6.
October 11, 201015 yr When a drive comes up as unformatted it means that unRAID could not mount the drive. Sometimes when power is lost the system will attempt to write the transactions that were lost because of the power down. This may prevent the drive from mounting when unRAID wanted it to. Most likely every thing is fine. I would stop the array and then start it again to see if the previously unmounted drive will mount. Since you told unRAID to start a parity sync it does not believe the data on the parity drive is good. Because of this you will need to invoke the "trust my parity" procedure. http://www.lime-technology.com/wiki/index.php?title=Make_unRAID_Trust_the_Parity_Drive,_Avoid_Rebuilding_Parity_Unnecessarily I would then perform a parity check without correction (unMenu > Array Management) to verify the parity information.
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