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SVCMODE — SVC mode field for VTOC statistics (number)

The value of SVCMODE is set to the value of DS1SVCMO, at the offset defined by sysparm DSCBSVMD, within the format-1 DSCB for the data set. This field is maintained in the format-1 DSCB by the CA Disk Open SVC as described in The CA Disk SVC in the Installation Guide.