Data validation affects performance because the server requires additional processor power to calculate and compare CRC values.
Consider the impact on performance when you decide whether data validation is necessary for storage pools. This method of validation is independent of validating data during a client session with the server. When you choose to validate storage pool data, there is no performance impact on the client.
If you enable CRC for storage pools on devices that later prove to be stable, you can increase performance by updating the storage pool definition to disable data validation.