SYNC(2) System Calls Manual 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.
Sync should be used by programs that examine a file system, for example fsck, df, etc. Sync is mandatory before a boot.
SEE ALSO
fsync(2), sync(8), update(8)
BUGS
The writing, although scheduled, is not necessarily complete upon return from sync.
4th Berkeley Distribution June 30, 1985 SYNC(2)
