October 10, 201015 yr Once you get a parity error, will the parity error count ever reset to 0 or will it stay at 1 then increment from there if you get errors on subsequent parity checks?
October 10, 201015 yr Once you get a parity error, will the parity error count ever reset to 0 or will it stay at 1 then increment from there if you get errors on subsequent parity checks? It will reset to zero at the beginning of the next parity check. (unless you use the NOCORRECT option and perform a verify only) Joe L.
October 11, 201015 yr Author I think what I'm seeing is when I had a failed disk and replaced it, it appears that during the rebuild.. a parity check takes place. Once the rebuild was complete, the error count still showed 1. So today, I kicked off a fresh parity check and it's at 95% with 0 errors. I'll report back if it completes and doesn't reset the counter. Thanks for the reply..
October 12, 201015 yr The counter has already been reset (it resets as soon as you start the new parity check). If you see any more errors, they could be new ones. If this happens, post a syslog.
October 15, 201015 yr Author The counter has already been reset (it resets as soon as you start the new parity check). If you see any more errors, they could be new ones. If this happens, post a syslog. Thanks Raj.. you are correct. It did reset once I kicked off the manual check. Evidently the so-called parity check during a drive reuild is a little misleading. It evidently doesn't do a full blown "FIX error correcting parity check". I'm good now. No more errors. woot!
October 15, 201015 yr It is impossible to do a parity check when rebuilding a drive. You cannot do a parity "check" if any drive in the array is invalid. Joe L.
October 15, 201015 yr Author It is impossible to do a parity check when rebuilding a drive. You cannot do a parity "check" if any drive in the array is invalid. Joe L. Why then after replaceing a failed drive did it show my last parity check as the timestamp of the rebuild?
October 15, 201015 yr Why then after replaceing a failed drive did it show my last parity check as the timestamp of the rebuild? If you read from syslog, both processes use same facility. you can argue this is misleading but just keep this in mind.
October 15, 201015 yr It is misleading you. As stated, the calculation of parity and writing of it to the parity disk is exactly identical to the process used when re-constructing a disk. The only difference is the disk being written to. Joe L.
October 15, 201015 yr Author It is misleading you. Joe L. Roger that! Just as I expected. Thanks for the clarification. Glad I ran a check afterwards for my sanity and piece of mind.
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