After what I suspect was a power outage I came back to my server and couldn't reach any drives.  When I looked at my main page all my disks are unassigned!  Dashboard is reporting SMART as OK, I don't have a record of which disk is which - what do I do next?  I'm running 6.1.9, Diagnostics attached.  Thanks for your help.

media-diagnostics-20170924-1800.zip

You should have upgraded long time ago, this doesn't happen on v6.2 and above.

 

Assign all disks as data disks (no parity) and start the array, if there's only on unmountable disk it's your parity, if there are more grab and post new diagnostics.

Thanks Johnnie.  Once I've fixed this I'll upgrade. 

 

I've found my one parity - now what?  I tried assigning the unmountable disk as parity but it complains about wrong disks.

Do another new config, re-assign all disks, including parity in the parity slot, check "parity is already valid" and start the array.

 

Run a parity sync, there will be a few sync errors, it's normal after doing this.

Yes, that's fixed it!  Thanks so much, johnnie.black.