The system-managed tape library accumulates statistics over the period of one hour. These statistics represent the activity of the IBM® Tape Library Dataserver that results from all hosts attached to the library.
At the end of the hour, the system calculates composite statistics about the activity of all devices in the library and writes an SMF type 94 record.
Represents the value of the statistic at the point the record is written.
Represents statistics over the most recent hour for which composite statistics have been calculated.
For a VTS library, when microcode level F/C 4001 is installed and Outboard Policy Management is enabled, a new SMF94 record will be recorded. The new record is an SMF94 subtype=2, and will be recorded in addition to the existing SMF94 subtype=1. The SMF94 subtype=2 record is used to record Volume Pool Statistics.
The existing subtype=1 is also changed. When F/C 4001 is installed and Outboard Policy Management is enabled, some existing statistics will not be reported. The unreported fields will contain binary zero. Existing field SMF94HSF in subtype=1 records will contain the value 2 when F/C 4001 is installed and Outboard Policy Management is enabled.