December 5, 20187 yr I'm relativly new to Unraid. I started with a 2tb drive, then added two 4tb drive, preclearing, and then assigning one as parity. This worked fine, and as it was filling up, I've bought a couple of new 6tb drives. I've connected up one of them and run a preclear, which has failed. I ran an extended smart test, and it comes back clean. This is really just to check I'm right in wanting to return the drive. And to ask what people tend to return it as? (how to word the fact that it's failed etc) preclear-fail.txt preclear-fail2.txt Edited December 6, 20187 yr by 3urningChrome Solved
December 5, 20187 yr Author Thanks for the response, here you go: tower-diagnostics-20181205-2038.zip
December 5, 20187 yr Community Expert The syslog snippet you posted earlier makes me think you probably didn't have a good connection to the disk and that is the reason the preclear couldn't complete. But that snippet doesn't appear in your diagnostics because you rebooted. On the other hand, the disk has several pending sectors and shouldn't be used in your array like that. You could try additional preclears (after checking connections) to see if you can get the pending sectors reallocated. On the third hand, another user @johnnie.black says these particular model of drives sometimes have false alarms about pending sectors.
December 5, 20187 yr Community Expert 1 hour ago, trurl said: On the third hand, another user @johnnie.black says these particular model of drives sometimes have false alarms about pending sectors. Sometimes yes, but those appear real, easy way to confirm is to run an extended SMART test.
December 6, 20187 yr Author I've changed the sata cable, made sure it all looks good on the connection front. Rerun the preclear, but same issue. I've run a quick smart test, comes back clean. I'm now in the process of running an extended. I've reattached the diagnostics as I'd rebooted after the last failure any insight you can give is much appreciated! tower-diagnostics-20181206-0923.zip
December 6, 20187 yr Author and the report from the now failed Extended smart test: tower-smart-20181206-1109.zip
December 6, 20187 yr Author As my confusion stemmed from the preclear failing, but the smart test passing, now the smart test has failed I guess I'm no longer confused thanks for your help in this, marking as solved.
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