UPDATE(8) BSD System Manager's Manual UPDATE(8)

NAME
     uuppddaattee - flush internal filesystem caches to disk frequently

SYNOPSIS
     uuppddaattee [normalinterval [saveenergyinterval]]

DESCRIPTION
     The uuppddaattee command helps protect the integrity of disk volumes by flush-
     ing volatile cached filesystem data to disk at thirty second intervals.
     UUppddaattee uses the sync(2) function call to do the task.  The normalinter-
     val and saveenergyinterval can be used to set the sync(2) interval in
     seconds of the normal case and the case where the computer is trying to
     save energy.

     UUppddaattee is commonly invoked at startup time by rc(8) when the system goes
     multi-user.

SEE ALSO
     sync(2), fsck(8), init(8), rc(8), sync(8)

BUGS
     It is possible on some systems that a sync occurring simultaneously with
     a crash may cause file system damage. See fsck(8).

HISTORY     An uuppddaattee command appeared in Version 6 AT&T UNIX.

BSD                             April 19, 1994                             BSD