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       hformat - create a new HFS filesystem and make it current


       hformat [-f] [-l label] destination-path [partition-no]


       hformat  is  used  to  write  a  new HFS filesystem to a volume. A UNIX
       pathname to the volume’s destination must be specified. The destination
       may  be  either  a  block device or a regular file, but it must already
       exist and be writable.

       An optional label can be specified to name the volume. The name must be
       between 1-27 characters and cannot contain a colon (:). By default, the
       volume will be named Untitled.

       If the  destination  medium  is  partitioned,  one  partition  must  be
       selected  to receive the filesystem. If there is only one HFS partition
       on the medium, it will be selected by default. Otherwise,  the  desired
       partition  number  must be specified (as the ordinal nth HFS partition)
       on the command-line. The size of the partition determines the  size  of
       the resulting volume.

       Partition  number  0  can be specified to format the entire medium as a
       single  filesystem  without  a  partition  map,  erasing  any  existing
       partition  information. Since this will destroy all the partitions, the
       -f option must be specified to  force  this  operation  if  the  medium
       currently contains a partition map.

       If  the medium is not partitioned (or if partition 0 is specified), the
       size or capacity of the medium determines the  size  of  the  resulting

       The  new  volume  will be empty and will become "current" so subsequent
       commands will refer to it. The current working directory for the volume
       is set to the root of the volume.


       % hformat /dev/fd0
              If a floppy disk is available as /dev/fd0, this formats the disk
              as an HFS volume named Untitled.  (N.B. The floppy must  already
              have received a low-level format by other means.)

       % dd if=/dev/zero of=disk.hfs bs=1k count=800
       % hformat -l "Test Disk" disk.hfs
              This  sequence  creates  an  800K  HFS  volume image in the file
              disk.hfs in the current directory, and names it Test Disk.

       % hformat -l "Loma Prieta" /dev/sd2 1
              If a SCSI disk is available as /dev/sd2,  this  initializes  the
              first  HFS partition on the disk (which must already exist) with
              a new filesystem, naming the resulting volume Loma Prieta.

       % hformat -f /dev/sd2 0
              This causes the medium accessible as /dev/sd2 to be  reformatted
              as  a  single  HFS  volume,  ignoring  and  erasing any existing
              partition information on the  medium.  The  -f  option  must  be
              specified  if the medium is currently partitioned; otherwise the
              command will fail.


       This command does not create or alter partition maps, although  it  can
       erase  them (as described above). Any partition number specified on the
       command line must already exist.

       The smallest volume size which can be formatted with hformat is 800K.


       hfsutils(1), hmount(1)




       Robert Leslie <>