NAME

       dvhtool - Disk volume header manipulation tool

SYNOPSIS

       dvhtool --device devicename [ option ]

       dvhtool -d devicename [ option ]

DESCRIPTION

       dvhtool  is  a  utility for displaying SGI disk partition and volume header information as
       well as for copying files to and from the volume header.

       It is similar to the IRIX(tm) utility of the same name, however the options and usage  are
       quite  different.   Also,  the  IRIX  utility  cannot  display  partition  and  boot  file
       information.

       The disk volume header includes the disk partition table and the  volume  directory.   The
       volume  directory  is  an index to the files stored in the volume header part of the disk.
       These files can be anything but are  usually  standalone  programs  (like  sash,  the  SGI
       standalone  shell).  The space available for files is usually limited to one, two or a few
       megabytes, this can only be changed by repartitioning the  disk  with  fx,  the  SGI  disk
       formatting and partitioning tool or fdisk.

       You  must  be root to invoke dvhtool.  The device name can be /dev/sda for the first disk,
       /dev/sdb for the second, and so on.

       dvhtool will also work on a file image of a disk volume header.

       OPTIONS -d,  --device devicename Specify the volume header device name (or file image)

       --print-volume-header
              Show volume header data only

       --print-volume-directory
              Show volume table of contents

       --print-partitions
              Show partition data

       --print-all
              Equivalent to all three above options

       --vh-remove name
              Remove volhdr file name.

       --vh-to-unix name file
              Copy volhdr file name to Unix file file

       --unix-to-vh file name
              Copy Unix file file to volhdr as name

       --help Show usage information

SEE ALSO

       fdisk(8)

       IRIX tools: fx(1M), prtvtoc(1M), vh(7M).

AUTHORS

       dvhtool  was  written  by   Ralf   Baechle   <ralf@oss.sgi.com>,   Keith   M.   Wesolowski
       <wesolows@foobazco.org>, Tor Arntsen <tor@spacetec.no>, Guido Guenther <agx@debian.org>.