Did your Optical Prime VSAN project appear to complete without issue, yet you see unexplainable I/O anomalies on your Optical Prime VSAN projects?
Have a look at this VMware known issue, and straightforward solutions.
https://kb.vmware.com/s/article/60248
Low Read or Writes?
Zero Reads or Writes?
100% Reads or Writes?
Samples:
No Writes
Zero Reads or Writes
