GEOM(8)

NAME

     geom -- universal control utility for GEOM classes

SYNOPSIS

     geom class command [options]

DESCRIPTION

     The geom utility is used to control various GEOM classes.	A class has to
     be aware of geom(8) comunication methods, but there are also some stan-
     dard commands which can be used for existing, not geom(8) aware classes.
     Here is the list of standard commands:

     help    List all available commands for the given class.

     list    Print detailed information (within the given class) about all
	     geoms (if no additional arguments were specified) or the given
	     geoms.  This command is only available if the given class exists
	     in the kernel.

     load    Load the kernel module that implements the given class.  This
	     command is only available if the class does not yet exist in the
	     kernel and the file geom_<class>.ko can be found in one of the
	     directories specifed in kern.module_path sysctl.

     unload  Unload the kernel module which implements the given class.  This
	     command is only available if the given class is loaded as a ker-
	     nel module.

     Class-specific commands are implemented as shared libraries which are
     stored in /lib/geom/ directory and are loaded via dlopen(3) function when
     the class name is known.  When a class-specific shared library exists, a
     direct utility should also be available under the name of gclass.

     Currently available classes which are aware of geom(8):

	   +o   CONCAT
	   +o   LABEL
	   +o   MIRROR
	   +o   NOP
	   +o   RAID3
	   +o   STRIPE

EXAMPLES

     The following example shows how to set up a stripe on three disks for
     automatic configuration:

	   geom stripe label -v -s 65536 data /dev/da0 /dev/da1 /dev/da2
	   or:
	   gstripe label -v -s 65536 data /dev/da0 /dev/da1 /dev/da2

     Print the list of all providers from the DISK class:

	   geom disk list

     Unload a kernel module which implements the MD class:

	   geom md unload

DIAGNOSTICS

     Exit status is 0 on success, and 1 if the command fails.

SEE ALSO

     geom(4), gconcat(8), glabel(8), gmirror(8), gnop(8), graid3(8),
     gstripe(8)

HISTORY

     The geom utility appeared in FreeBSD 5.3.

AUTHORS

     Pawel Jakub Dawidek <pjd@FreeBSD.org>