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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
	       second-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 4.9		       February 18, 2008		   OpenBSD 4.9

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