nenable=flag
options:
udebug 1st level debug (open, etc)
uDebug full debug output (verbose)
uedebug end of file/media debug
ufdebug file system debug
urdebug random I/O debug
utdebug timer debug output
usyslog write messages to syslog
utimestamps timestamp blocks
ndispose=keep dont
delete FS files
nhistory=value I/O
history mechanism
ntrigger=type
specifies trigger type