"turn off updates to control file for direct writes"
*Action: Control files won't get updated for direct writes for LOBs
when NOCACHE NOLOGGING is set. The only bad impact that it
can have is that if you are using the recovery manager,
it may affect a warning that says that the user should
back everything up. Now the recovery manager won't know
to tell you that the files that were updated with
unrecoverable events should be backed up.