sync man page on UNIXv7

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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(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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