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 standard 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 kernel 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):
•
CONCAT
•
LABEL
•
MIRROR
•
NOP
•
RAID3
•
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 [AT] FreeBSD.org>
BSD May 21, 2004 BSD