SGIVOL(8)            OpenBSD System Manager's Manual (SGI)           SGIVOL(8)

NAME
     sgivol - initialise and manipulate SGI disk volume headers

SYNOPSIS
     sgivol [-q] disk
     sgivol [-q] -d vhfilename disk
     sgivol [-q] -i [-h vhsize] disk
     sgivol [-q] -l vhfilename1 vhfilename2 disk
     sgivol [-q] -r vhfilename diskfilename disk
     sgivol [-q] -w vhfilename diskfilename disk

DESCRIPTION
     sgivol is used to initialise and manipulate SGI disk volume headers.

     The SGI volume header is a disklabel-like structure located at the start
     of a disk.  It is typically 3135 (512-byte) blocks in size, and can store
     a variety of files inside it, typically boot programs.

     The options are as follows:

     -d vhfilename
               Delete the file vhfilename from the filesystem storage space in
               the volume header.

     -h vhsize
               Choose an alternate volume header size, in (512-byte) disk
               blocks.  The default is 3135 blocks.

     -i        Initialise a volume header on the supplied device.

     -l vhfilename1 vhfilename2
               Link the file vhfilename1 to the file vhfilename2 within the
               filesystem storage space in the volume header.

     -q        Be quiet about various diagnostic issues.

     -r vhfilename diskfilename
               Locate the file vhfilename in the storage space of the volume
               header, and copy it to the standard file diskfilename.

     -w vhfilename diskfilename
               Copy the standard file diskfilename to the filesystem storage
               space in the volume header, placing it there with the name
               vhfilename.

     disk      The name of the disk containing the partition in which the sec-
               ond-stage boot program resides and the first-stage boot program
               is to be installed.  This can either be specified in short form
               (e.g., `sd0' or as the explicit device node, such as
               /dev/rsd0c).

               Note that you must be in single-user mode or have your kernel
               in insecure mode (see the sysctl(8) kern.securelevel variable
               or /etc/rc.securelevel) to enable access to the raw partition
               of a mounted disk.

     If no special flags are supplied, sgivol will display the current volume
     header information.

EXAMPLES
     The typical use is

           # /usr/mdec/sgivol -i sd0
           # /usr/mdec/sgivol -w boot /usr/mdec/boot sd0

SEE ALSO
     disklabel(8), init(8)

OpenBSD 4.7                    February 18, 2008                             2
