ReadyNAS Pro rebooting and resyncing, with file copy hangups and other issues

I ordered a new PSU.  

I recently updated the BIOS, as it was still running the 2008 version.

I then did a thorough drive test using the boot menu option.  No problems found.

So, I tried doing a big copy and the NAS soon went into the same reboot/resync cycle.

Next, I pulled the two 4tb drives for which I had the nagging concern were not compatible since the SMART tables reported grossly inaccurate total hours used along with a few other parameters.

Anyway, it quickly went into another reboot/resync while trying to rebuild the smaller 4x2tb XRAID2 volume using known good drives that are specifically in the Netgear drive compatibility list.  So, I figure it isn't a disk problem, and even with the reduced PSU current demand when using 2 less disks, it still goes into reboot.  Of course, it could be the CPU or motherboard, and not the PSU.

I have already setup a new NAS.  I would like to use this older ReadyNAS Business Pro as a remote backup/mirror, giving me a more complete backup solution.

I will post the results of the PSU swap.