| SYNC(8) | System Manager's Manual | SYNC(8) |
sync — force
completion of pending disk writes (flush cache)
sync |
The sync utility can be called to ensure
that all disk writes have been completed before the processor is halted in a
way not suitably done by reboot(8) or
halt(8). Generally, it is preferable to
use reboot(8) or
halt(8) to shut down the system, as they
may perform additional actions such as resynchronizing the hardware clock
and flushing internal caches before performing a final
sync.
The sync utility utilizes the
sync(2) function call.
A sync utility appeared in
Version 4 AT&T UNIX.
| May 31, 1993 | macOS 15.0 |