SYNC(2) 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(8), update(8) BUGS The writing, although scheduled, is not necessarily complete upon return from sync.