September 30, 20178 yr Hello, I'm currently upgrading some of my old, smaller drives to new ones. I have a 2TB Parity + 2TB Data 1 + 2TB Data 2 + 1TB Data 3 I purchased 2 new 6TB Drives to change the parity and the 1TB Drive. I changed the parity and let the sync / rebuild complete. It took about 30 hours. Data Disk 2 showed 1954 errors. Parity is valid Should I replace the 2TB Data Disk instead of the planned 1TB Data Disk? Diagnostics file attached. tower-diagnostics-20170930-2248.zip
September 30, 20178 yr Community Expert 14 minutes ago, struisje said: Should I replace the 2TB Data Disk instead of the planned 1TB Data Disk? Disk2 needs to replaced but since there were errors during the parity sync there will be some corrupt files if you use to it to rebuild. Is the original parity disk still intact? Were there any writes to the array after you replaced it?
September 30, 20178 yr Author Yes, the original is still intact. I've only been using the cache drive, not the array, so there shouldn't be any changes on the array.
September 30, 20178 yr Community Expert In that case the best option would be to do a new config, keep all current data disks but re-assign old parity, check "parity is already valid" before starting the array and then replace disk2, keep old disk2 intact in case it's needed.
October 1, 20178 yr Author Thanks, I will give that a try today. Just one question. Can a 2TB Parity rebuild the data on a new 6TB Data Disk? I was under the impression that the parity had to be the largest disk. Or is this only for running the array and not rebuilding?
October 1, 20178 yr Community Expert Both parity disks have to be the same size or larger than the largest data disk.
October 1, 20178 yr Author So I would have to buy another 2TB disk to save my data? Is there any way I can do this without having to buy an extra disk (I just bough 2 6TB drives, the wife won't be happy) Is it possible to install the old parity again, then copy data from the array to an external drive? Will it use the parity to check for broken files or would I just be copying corrupt files to the external drive? If I have 1954 errors on the disk, how much of the files would be corrupt? Is there a way of knowing? Since there are only movies on this disk, it might be easier to rerip a few of the blu-Ray's on there. Thanks
October 1, 20178 yr Author Wait, I think I get it now Reinstall the old parity Check Parity is valid Do the Parity swap procedure
October 1, 20178 yr Community Expert 2 minutes ago, struisje said: Wait, I think I get it now Reinstall the old parity Check Parity is valid Do the Parity swap procedure Correct
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