Hey guys, just precleared an 8tb disk, then added it to my array.  I made a new config (so i could swap disk numbers around), and got 700k parity sync errors corrected.  Can anyone have a look at my diagnostics file as i have some important data on my array.  I use this  array to make all my backups so if my family photos are corrupted i need to know how to fix this. I have never seen any errors before..   Any help would be very much appreciated.

 

 

server-diagnostics-20200223-1333.zip

Edited February 23, 20206 yr by xman111

If you reorder the data disks then parity2 is not valid so it has to be rebuilt.

I did change disk 3 and 4 on purpose.  did you see anything in logs that is a problem?   should I rerun parity?  can I be confident my data isn't corrupted? 

 

thanks for your response as it is worrisome. 

Edited February 23, 20206 yr by xman111

Parity2 calculation, unlike parity1, is dependent on the order of the disks, simple as that. And, your syslog says it was correcting Q (parity2).

Feb 22 16:32:15 Server kernel: mdcmd (43): check 
Feb 22 16:32:15 Server kernel: md: recovery thread: check P Q ...
Feb 22 16:32:15 Server kernel: md: recovery thread: Q corrected, sector=0
Feb 22 16:32:15 Server kernel: md: recovery thread: Q corrected, sector=8
...
Feb 22 16:32:15 Server kernel: md: recovery thread: Q corrected, sector=816
Feb 22 16:32:15 Server kernel: md: recovery thread: Q corrected, sector=824
Feb 22 16:32:15 Server kernel: md: recovery thread: stopped logging

So this is completely normal. Run a non-correcting parity check to verify and everything should be fine.

thanks man.  I just ran another parity check, didn't even know about a non correcting one.   thanks for your help.  been using unraid for many years and still learning new things about it.