Find out when the I/O feedback area is updated and what it is updated with.
The system communicates the results of I/O operations to the program using i5/OS™ messages and I/O feedback information. The system updates the I/O feedback area for every I/O operation unless your program uses a blocked record I/O. In that case, the system updates the feedback area only when you read or write a block of records. Some of the information reflects the last record in the block. Other information, such as the count of I/O operations, reflects the number of operations on blocks of records and not the number of records. See your high-level language manual to determine if your program uses blocked record I/O.
The I/O feedback area consists of two parts: Common I/O Feedback Area and a file-dependent area. The file-dependent area varies by the file type.