I/O error retry

When IMS closes a database after updating it, IMS automatically retries EEQEs for read and write errors.

IMS authorizes attached subsystems to use a database with write errors, but IMS does not allow them to access blocks or CIs that were not successfully written. If any application program in one of these subsystems requests data requiring access to one of these blocks or CIs, IMS gives the program an AO status code, indicating a read error.

When the I/O-error retry is successful, IMS deletes the EEQE and sends messages to the MTO and z/OS® console. IMS sends message DFS0614I for each error that it successfully retries, and message DFS0615I when it resolves all outstanding errors.