Sorry I've searched and tried to find some sort of perspective on the number of parity errors and the severity of it.  Is 2 errors, as reported by the admin screen after a parity check, 2 bits? 2 drives?  Is that severe or nothing?  Thanks.

It's 2 bits and shouldn't be a problem.  It could be as simple as a record didn't happen or there was a corrupt bit.  If you do another check and it starts to increase then there could be a cause for concern. 

In my experience parity errors will happen after power outages or anything else that causes unRAID to go down without being cleanly shutdown.

 

If you had such an event and got 2 sync errors, not a big deal.

 

If sync errors are happening at other times, even just a few, that is a bad thing. Each one represents an opportunity for a disk rebuild to be corrupted.

 

If you ran a parity check yesterday and got 0 errors, and then another one today and got 2 parity errors (with no dirty shutdowns), that would be a bad thing.

 

Normally people that have problems do not have such suble errors (incompatible motherboards can cause parity check counts in the 1000s!)

 

 

 

 

Thanks to both for your help.  i was repeatedly getting 2 errors for about a week, but I took out all the round IDE cables and made a few other minor hardware enhancements and have gotten 0 errors the last few parity checks.