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Unix Version 7 - man page for sync (v7 section 2)

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.

       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
       (sync = 36.)
       sys sync

											  SYNC(2)


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