Data validation can identify data corruption during a client session when data is sent between a client and the server. IBM® Tivoli® Storage Manager provides the option of specifying whether a cyclic redundancy check (CRC) is performed during a client session to validate data sent over the network between a client or a storage agent and the server.
Cyclic redundancy checking is performed at the client when the client requests services from the server. For example, the client issues a query, backup, or archive request. The server also performs a CRC operation on the data sent by the client and compares its value with the value calculated by the client. If the CRC values do not match, the server will issue an error message once per session. Depending on the operation, the client may attempt to automatically retry the operation.
After Tivoli Storage Manager completes the data validation, the client and server discard the CRC values generated in the current session.
See Choosing when to enable data validation to help you determine where to enable data validation.