During nonpeak hours, you can convert the same volume pairs to
synchronous mode. To do this, issue the following CESTPAIR command
with OPTION(SYNC) specified. Pending tracks and potential updates
will then be transmitted synchronously to secondary volumes.
CESTPAIR DEVN(X'F41') PRIM(X'A763' FCA76 X'6B' X'03')
SEC(X'A762' FCA76 X'1E' X'02') MSGREQ(NO) CRIT(YES) OPTION(SYNC)