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 ALSOdisklabel(8), init(8)OpenBSD 4.9 February 18, 2008 OpenBSD 4.9