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DFSDBH40

DFSDBH40 is the OSAM Buffer Handler I/O ErrorKB Routine. It processes read errors, write errors, and out-of-space conditions. It interfaces with MVS I/O Toleration and writes the I/O error messages to the MVS and IMS consoles.

Hints

DFSDBH40 is only invoked for I/O errors, and even then does very little work. It should never be a performance factor.

Reference Sources

More information is available in the IMS DBSOURCE Library Data Set. See your IMS systems programmer.