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zeero(8)							     zeero(8)



NAME

  zeero	- Zero out disks prior to rewrite.

SYNOPSIS

  /usr/lbin/zeero [-d] [-f] device

OPTIONS

  -d  Specifies	diagnostic mode.  Prints the total number of writes and	the
      exit errno.  An exit status of errno 28 indicates	success; zeros were
      written until the	device ran out of space.

  -f  Specifies	silent mode.  This option does not prompt for a	response.  If
      the -f option is not used, the user is warned that all data will be
      erased from /dev/rdisk/dsk?? and asked for an affirmative	response
      before continuing.

DESCRIPTION

  The zeero command writes zeros throughout a disk partition including the
  disk label.  You must	be super user to use this command.

EXAMPLES

   1.  In the following	example, the zeero command is used to overwrite	par-
       tition a	with zeros.
	    /usr/lbin/zeero /dev/rdisk/dsk1a

   2.  In the following	example, the zeero command is used to overwrite	the
       entire disk with	zeros.
	    /usr/lbin/zeero /dev/rdisk/dsk0c



FILES

  /usr/lbin/zeero