Sun Microsystems Sun Workstation 100U System Manager's Manual page 256

SYNC(8) MAINTENANCE COMMANDS SYNC(8)
NAME
sync - update the super block
SYNOPSIS
sync
DESCRIPTION
Sync executes the 8ync system primitive. Sync can be called to insure all disk writes have been
completed before the processor
is
halted in a way not suitably done by rehoot(8) or halt(8).
See 8ync(2) for details on the system primitive.
SEE ALSO
sync(2), fsync(2), halt(8), reboot(8)
Sun Release 1.1
Last change:
4
February 1983 101