cybersteel8 Posted June 25, 2021 Share Posted June 25, 2021 I have migrated all my data to my new array, and I am yet to add parity. I am considering running a "Read check" on my array before adding the parity. Is there any value in this? I understand that once I have my parity drives installed, a "Parity check" will be checking the data against the parity data, but without parity, does a "Read check" do anything? I am specifically referring to the button at the bottom of the Main page, where you can also see options like Reboot/Shutdown/Clear Stats and the Start/Stop array buttons etc. So, is there a difference between a Parity Check and a Read Check? Without parity, does a Read Check do anything useful? Thanks for your information. I couldn't find anything in the manual regarding this, unfortunately. Quote Link to comment
JorgeB Posted June 25, 2021 Share Posted June 25, 2021 Read check like the name implies only reads the data disks, it will report any read errors. Quote Link to comment
cybersteel8 Posted June 25, 2021 Author Share Posted June 25, 2021 11 hours ago, JorgeB said: Read check like the name implies only reads the data disks, it will report any read errors. Ah, so it functions kind of like a health check of the drive to see if all the sectors are still readable? Thanks! Quote Link to comment
JorgeB Posted June 26, 2021 Share Posted June 26, 2021 12 hours ago, cybersteel8 said: so it functions kind of like a health check of the drive to see if all the sectors are still readable? Yep. Quote Link to comment
cybersteel8 Posted June 29, 2021 Author Share Posted June 29, 2021 Thanks, that's very helpful. I have a follow-up question: I see that Unraid has a Parity Check Scheduler built-in but there isn't one for a Read Check. Is it safe to assume that when a Parity Check runs, it is also implicitly doing a read check at the same time? Quote Link to comment
JorgeB Posted June 29, 2021 Share Posted June 29, 2021 Yes, it also reads all the disks during a parity check. 1 Quote Link to comment
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