Hi pkmr,
Done with analyzing on your PSOD issue, please follow this KB for resolution "https://kb.vmware.com/s/article/2140848?language=en_US"
Solution: please upgrade to latest update of ESX 6.0 or at-least go to ESX 6.0 U2 to fix this bug
Reason for issue:
PCPU becomes too busy logging all the correctable error messages to perform routine background tasks which leading ESXi to assume that PCPU is unresponsive. and finally it is causes a purple diagnostic screen and showing as host not responding in vCenter.
Please let me know if you have any questions?