SYNC(2)

NAME
sync - update super-block

SYNOPSIS
sync( )

DESCRIPTION
Sync causes all information in core memory that should be on disk to be written out. This includes modified super blocks, modified i-nodes, and delayed block I/O.

It should be used by programs which examine a file system, for example icheck, df, etc. It is mandatory before a boot.

SEE ALSO
sync(1), update(8)

BUGS
The writing, although scheduled, is not necessarily complete upon return from sync.

ASSEMBLER (PDP-11)
(sync = 36.)
sys sync