Andrey Vetrov
vSAN uses end-to-end checksum to ensure the integrity of data by confirming that each copy of a file is exactly the same as the source file. The system checks the validity of the data during read/write operations, and if an error is detected, vSAN repairs the data or reports the error.
еще раз, 2 копии данных которые разнятся, витнес не вкурсе какие данные валидны