Copying database source files to device source files
When you are copying to a device source file, the system removes the date fields and the sequence number fields from the start of the records.
When copying to or from a device, it is more efficient to use a device data file than a device source file. The copy function automatically adds or removes source sequence number fields and date fields as necessary.
Parent topic:
Adding or changing source file sequence number and date fields (SRCOPT and SRCSEQ parameters)