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+.pa 1
+.he 'SYNC (II)'6/12/72'SYNC (II)'
+.ti 0
+NAME sync -- update super-block
+.sp
+.ti 0
+SYNOPSIS sys sync / sync = 36.; not in assembler
+.sp
+.ti 0
+DESCRIPTION sync____
+causes the super block for all file systems to be written out.
+It is only necessary on systems in which
+this writing may be delayed
+for a long time, i.e., those which
+incorporate hardware protection facilities.
+
+It should be used by programs which examine a file system,
+for example check, df, tm, etc.
+.sp
+.ti 0
+SEE ALSO --
+.sp
+.ti 0
+DIAGNOSTICS --
+.sp
+.ti 0
+BUGS --