NAME

sync − update super block

SYNOPSIS

void sync ( )

DESCRIPTION

sync causes all information in 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 fsck, df, etc. It is mandatory before a re-boot.

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

September 29, 2021