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download PDF document: geom.8.pdf

GEOM(8) FreeBSD System Manager's Manual GEOM(8)
NAME geom - universal control utility for GEOM classes
SYNOPSIS geom class help geom class list [-a] [name ...] geom class status [-ags] [name ...] geom class load [-v] geom class unload [-v] geom -p provider-name geom -t
DESCRIPTION The geom utility is used to control various GEOM classes. A class has to be aware of geom communication methods, but there are also some standard commands which can be used for existing geom unaware 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. Additional options include:
-a Print information for geoms without providers.
status Print general 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.
Additional options include:
-a When used with -g, print status for geoms without providers.
-g Report statuses for geoms instead of providers.
-s Produce script-friendly output.
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 specified 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.
Additional options include:
-p provider-name Print detailed information about the geom which provides
direct utility should also be available under the name of gclass.
Currently, classes aware of geom are:
o CACHE o CONCAT o ELI o JOURNAL o LABEL o MIRROR o MOUNTVER o MULTIPATH o NOP o PART o RAID o RAID3 o SCHED o SHSEC o STRIPE o UNION o VINUM (deprecated) o VIRSTOR
ENVIRONMENT The following environment variables affect the execution of geom:
GEOM_LIBRARY_PATH Specifies the path where shared libraries are stored instead of /lib/geom/. Multiple paths can be specified with a colon-separated list of paths.
EXIT STATUS Exit status is 0 on success, and 1 if the command fails.
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
SEE ALSO libgeom(3), geom(4), gcache(8), gconcat(8), geli(8), gjournal(8), glabel(8), gmirror(8), gmountver(8), gmultipath(8), gnop(8), gpart(8), graid3(8), gsched(8), gshsec(8), gstripe(8), gunion(8), gvinum(8), gvirstor(8)
HISTORY The geom utility appeared in FreeBSD 5.3.