VGCHANGE(8) | System Manager's Manual | VGCHANGE(8) |
NAME
vgchange — Change volume group attributes
SYNOPSIS
vgchange option_args position_args
[ option_args ]
[ position_args ]
-a|--activate y|n|ay
--activationmode partial|degraded|complete
--addtag Tag
--alloc
contiguous|cling|cling_by_tags|normal|anywhere|inherit
--autoactivation String
-A|--autobackup y|n
--commandprofile String
--config String
-d|--debug
--deltag Tag
--detachprofile
--devices PV
--devicesfile String
--driverloaded y|n
-f|--force
-h|--help
-K|--ignoreactivationskip
--ignorelockingfailure
--ignoremonitoring
--journal String
--lockopt String
--lockstart
--lockstop
--locktype sanlock|dlm|none
-l|--logicalvolume Number
--longhelp
--majoritypvs
-p|--maxphysicalvolumes Number
--metadataprofile String
--monitor y|n
--nohints
--nolocking
--noudevsync
-P|--partial
-s|--physicalextentsize Size[m|UNIT]
--poll y|n
--profile String
--pvmetadatacopies 0|1|2
-q|--quiet
--readonly
--refresh
--reportformat basic|json|json_std
-x|--resizeable y|n
-S|--select String
--setautoactivation y|n
--sysinit
--systemid String
-t|--test
-u|--uuid
-v|--verbose
--version
--[vg]metadatacopies
all|unmanaged|Number
-y|--yes
DESCRIPTION
vgchange changes VG attributes, changes LV activation in the kernel, and includes other utilities for VG maintenance.
USAGE
Change a general VG attribute.
For options listed in parentheses, any one is
required, after which the others are optional.
vgchange
-p|--maxphysicalvolumes Number
-u|--uuid
-s|--physicalextentsize Size[m|UNIT]
-x|--resizeable y|n
--addtag Tag
--deltag Tag
--alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
--pvmetadatacopies 0|1|2
--[vg]metadatacopies all|unmanaged|Number
--profile String
--detachprofile
--metadataprofile String
--setautoactivation y|n )
[ -S|--select String ]
[ -f|--force ]
[ --poll y|n ]
[ --ignoremonitoring ]
[ --noudevsync ]
[ --reportformat basic|json|json_std ]
[ COMMON_OPTIONS ]
—
Start or stop monitoring LVs from dmeventd.
vgchange --monitor y|n
[ -S|--select String ]
[ -f|--force ]
[ --sysinit ]
[ --ignorelockingfailure ]
[ --poll y|n ]
[ --ignoremonitoring ]
[ --noudevsync ]
[ --reportformat basic|json|json_std ]
[ COMMON_OPTIONS ]
—
Start or stop processing LV conversions.
vgchange --poll y|n
[ -S|--select String ]
[ -f|--force ]
[ --ignorelockingfailure ]
[ --ignoremonitoring ]
[ --noudevsync ]
[ --reportformat basic|json|json_std ]
[ COMMON_OPTIONS ]
—
Activate or deactivate LVs.
vgchange -a|--activate
y|n|ay
[ -P|--partial ]
[ -A|--autobackup y|n ]
[ -S|--select String ]
[ -f|--force ]
[ --activationmode partial|degraded|complete ]
[ --sysinit ]
[ --readonly ]
[ --ignorelockingfailure ]
[ --monitor y|n ]
[ --poll y|n ]
[ --autoactivation String ]
[ --ignoremonitoring ]
[ --noudevsync ]
[ --reportformat basic|json|json_std ]
[ COMMON_OPTIONS ]
—
Reactivate LVs using the latest metadata.
vgchange --refresh
[ -S|--select String ]
[ -f|--force ]
[ --sysinit ]
[ --ignorelockingfailure ]
[ --poll y|n ]
[ --ignoremonitoring ]
[ --noudevsync ]
[ --reportformat basic|json|json_std ]
[ COMMON_OPTIONS ]
—
Change the system ID of a VG.
vgchange --systemid String
VG|Tag|Select
[ --majoritypvs ]
[ COMMON_OPTIONS ]
—
Start the lockspace of a shared VG in lvmlockd.
vgchange --lockstart
[ COMMON_OPTIONS ]
—
Stop the lockspace of a shared VG in lvmlockd.
vgchange --lockstop
[ COMMON_OPTIONS ]
—
Change the lock type for a shared VG.
vgchange --locktype
sanlock|dlm|none VG
—
Common options for lvm:
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --devices PV ]
[ --devicesfile String ]
[ --driverloaded y|n ]
[ --journal String ]
[ --lockopt String ]
[ --longhelp ]
[ --nohints ]
[ --nolocking ]
[ --profile String ]
[ --version ]
OPTIONS
-a|--activate y|n|ay
Change the active state of LVs. An active LV can be used through a block
device, allowing data on the LV to be accessed. y makes LVs active,
or available. n makes LVs inactive, or unavailable. The block device
for the LV is added or removed from the system using device-mapper in the
kernel. A symbolic link /dev/VGName/LVName pointing to the device node is
also added/removed. All software and scripts should access the device
through the symbolic link and present this as the name of the device. The
location and name of the underlying device node may depend on the
distribution, configuration (e.g. udev), or release version. ay
specifies autoactivation, which is used by system-generated activation
commands. By default, LVs are autoactivated. An autoactivation property can
be set on a VG or LV to disable autoactivation, see --setautoactivation y|n
in vgchange, lvchange, vgcreate, and lvcreate. Display the property with vgs
or lvs "-o autoactivation". The lvm.conf(5)
auto_activation_volume_list includes names of VGs or LVs that should be
autoactivated, and anything not listed is not autoactivated. When
auto_activation_volume_list is undefined (the default), it has no effect. If
auto_activation_volume_list is defined and empty, no LVs are autoactivated.
Items included by auto_activation_volume_list will not be autoactivated if
the autoactivation property has been disabled. See lvmlockd(8) for
more information about activation options ey and sy for shared
VGs.
--activationmode
partial|degraded|complete
Determines if LV activation is allowed when PVs are missing, e.g. because of a
device failure. complete only allows LVs with no missing PVs to be
activated, and is the most restrictive mode. degraded allows RAID LVs
with missing PVs to be activated. (This does not include the
"mirror" type, see "raid1" instead.) partial
allows any LV with missing PVs to be activated, and should only be used for
recovery or repair. For default, see lvm.conf(5) activation_mode. See
lvmraid(7) for more information.
--addtag Tag
Adds a tag to a PV, VG or LV. This option can be repeated to add multiple tags
at once. See lvm(8) for information about tags.
--alloc
contiguous|cling|cling_by_tags|normal|anywhere|inherit
Determines the allocation policy when a command needs to allocate Physical
Extents (PEs) from the VG. Each VG and LV has an allocation policy which can
be changed with vgchange/lvchange, or overridden on the command line.
normal applies common sense rules such as not placing parallel
stripes on the same PV. inherit applies the VG policy to an LV.
contiguous requires new PEs be placed adjacent to existing PEs.
cling places new PEs on the same PV as existing PEs in the same
stripe of the LV. If there are sufficient PEs for an allocation, but normal
does not use them, anywhere will use them even if it reduces
performance, e.g. by placing two stripes on the same PV. Optional positional
PV args on the command line can also be used to limit which PVs the command
will use for allocation. See lvm(8) for more information about
allocation.
--autoactivation String
Specify if autoactivation is being used from an event. This allows the command
to apply settings that are specific to event activation, such as device
scanning optimizations using pvs_online files created by event-based
pvscans.
-A|--autobackup y|n
Specifies if metadata should be backed up automatically after a change.
Enabling this is strongly advised! See vgcfgbackup(8) for more
information.
--commandprofile String
The command profile to use for command configuration. See lvm.conf(5)
for more information about profiles.
--config String
Config settings for the command. These override lvm.conf(5) settings.
The String arg uses the same format as lvm.conf(5), or may use
section/field syntax. See lvm.conf(5) for more information about
config.
-d|--debug ...
Set debug level. Repeat from 1 to 6 times to increase the detail of messages
sent to the log file and/or syslog (if configured).
--deltag Tag
Deletes a tag from a PV, VG or LV. This option can be repeated to delete
multiple tags at once. See lvm(8) for information about tags.
--detachprofile
Detaches a metadata profile from a VG or LV. See lvm.conf(5) for more
information about profiles.
--devices PV
Restricts the devices that are visible and accessible to the command. Devices
not listed will appear to be missing. This option can be repeated, or
accepts a comma separated list of devices. This overrides the devices
file.
--devicesfile String
A file listing devices that LVM should use. The file must exist in
/etc/lvm/devices/ and is managed with the lvmdevices(8)
command. This overrides the lvm.conf(5) devices/devicesfile
and devices/use_devicesfile settings.
--driverloaded y|n
If set to no, the command will not attempt to use device-mapper. For testing
and debugging.
-f|--force ...
Override various checks, confirmations and protections. Use with extreme
caution.
-h|--help
Display help text.
-K|--ignoreactivationskip
Ignore the "activation skip" LV flag during activation to allow LVs
with the flag set to be activated.
--ignorelockingfailure
Allows a command to continue with read-only metadata operations after locking
failures.
--ignoremonitoring
Do not interact with dmeventd unless --monitor is specified. Do not use this
if dmeventd is already monitoring a device.
--journal String
Record information in the systemd journal. This information is in addition to
information enabled by the lvm.conf log/journal setting. command: record
information about the command. output: record the default command output.
debug: record full command debugging.
--lockopt String
Used to pass options for special cases to lvmlockd. See lvmlockd(8) for
more information.
--lockstart
Start the lockspace of a shared VG in lvmlockd. lvmlockd locks becomes
available for the VG, allowing LVM to use the VG. See lvmlockd(8) for
more information.
--lockstop
Stop the lockspace of a shared VG in lvmlockd. lvmlockd locks become
unavailable for the VG, preventing LVM from using the VG. See
lvmlockd(8) for more information.
--locktype sanlock|dlm|none
Change the VG lock type to or from a shared lock type used with lvmlockd. See
lvmlockd(8) for more information.
-l|--logicalvolume Number
Sets the maximum number of LVs allowed in a VG.
--longhelp
Display long help text.
--majoritypvs
Change the VG system ID if the majority of PVs in the VG are present (one more
than half).
-p|--maxphysicalvolumes Number
Sets the maximum number of PVs that can belong to the VG. The value 0 removes
any limitation. For large numbers of PVs, also see options
--pvmetadatacopies, and --vgmetadatacopies for improving performance.
--metadataprofile String
The metadata profile to use for command configuration. See lvm.conf(5)
for more information about profiles.
--monitor y|n
Start (yes) or stop (no) monitoring an LV with dmeventd. dmeventd monitors
kernel events for an LV, and performs automated maintenance for the LV in
response to specific events. See dmeventd(8) for more
information.
--nohints
Do not use the hints file to locate devices for PVs. A command may read more
devices to find PVs when hints are not used. The command will still perform
standard hint file invalidation where appropriate.
--nolocking
Disable locking. Use with caution, concurrent commands may produce incorrect
results.
--noudevsync
Disables udev synchronization. The process will not wait for notification from
udev. It will continue irrespective of any possible udev processing in the
background. Only use this if udev is not running or has rules that ignore
the devices LVM creates.
-P|--partial
Commands will do their best to activate LVs with missing PV extents. Missing
extents may be replaced with error or zero segments according to the
missing_stripe_filler setting. Metadata may not be changed with this
option.
-s|--physicalextentsize Size[m|UNIT]
Sets the physical extent size of PVs in the VG. The value must be either a
power of 2 of at least 1 sector (where the sector size is the largest sector
size of the PVs currently used in the VG), or at least 128 KiB. Once
this value has been set, it is difficult to change without recreating the
VG, unless no extents need moving. Before increasing the physical extent
size, you might need to use lvresize, pvresize and/or pvmove so that
everything fits. For example, every contiguous range of extents used in a LV
must start and end on an extent boundary.
--poll y|n
When yes, start the background transformation of an LV. An incomplete
transformation, e.g. pvmove or lvconvert interrupted by reboot or crash, can
be restarted from the last checkpoint with --poll y. When no, background
transformation of an LV will not occur, and the transformation will not
complete. It may not be appropriate to immediately poll an LV after
activation, in which case --poll n can be used to defer polling until a
later --poll y command.
--profile String
An alias for --commandprofile or --metadataprofile, depending on the
command.
--pvmetadatacopies 0|1|2
The number of metadata areas to set aside on a PV for storing VG metadata.
When 2, one copy of the VG metadata is stored at the front of the PV and a
second copy is stored at the end. When 1, one copy of the VG metadata is
stored at the front of the PV. When 0, no copies of the VG metadata are
stored on the given PV. This may be useful in VGs containing many PVs (this
places limitations on the ability to use vgsplit later.)
-q|--quiet ...
Suppress output and log messages. Overrides --debug and --verbose. Repeat once
to also suppress any prompts with answer 'no'.
--readonly
Prevent the command from making changes, including activation and metadata
updates. (See --permission r for read only LVs.)
--refresh
If the LV is active, reload its metadata. In an environment where udev is used
to manage the /dev content, usage of this option is highly recommended. This
is because refresh also regenerates udev events for an LV based on which
existing udev rules are applied to set the /dev content and permissions.
Also, this operation may be useful if something has gone wrong, or if some
form of manual LV sharing is being used.
--reportformat basic|json|json_std
Overrides current output format for reports which is defined globally by the
report/output_format setting in lvm.conf(5). basic is the
original format with columns and rows. If there is more than one report per
command, each report is prefixed with the report name for identification.
json produces report output in JSON format. json_std produces
report output in JSON format which is more compliant with JSON standard. See
lvmreport(7) for more information.
-x|--resizeable y|n
Enables or disables the addition or removal of PVs to/from a VG (by
vgextend/vgreduce).
-S|--select String
Select objects for processing and reporting based on specified criteria. The
criteria syntax is described by --select help and
lvmreport(7). For reporting commands, one row is displayed for each
object matching the criteria. See --options help for selectable
object fields. Rows can be displayed with an additional "selected"
field (-o selected) showing 1 if the row matches the selection and 0
otherwise. For non-reporting commands which process LVM entities, the
selection is used to choose items to process.
--setautoactivation y|n
Set the autoactivation property on a VG or LV. Display the property with vgs
or lvs "-o autoactivation". When the autoactivation property is
disabled, the VG or LV will not be activated by a command doing
autoactivation (vgchange, lvchange, or pvscan using -aay.) If autoactivation
is disabled on a VG, no LVs will be autoactivated in that VG, and the LV
autoactivation property has no effect. If autoactivation is enabled on a VG,
autoactivation can be disabled for individual LVs.
--sysinit
Indicates that vgchange/lvchange is being invoked from early system
initialisation scripts (e.g. rc.sysinit or an initrd), before writable
filesystems are available. As such, some functionality needs to be disabled
and this option acts as a shortcut which selects an appropriate set of
options. Currently, this is equivalent to using --ignorelockingfailure,
--ignoremonitoring, --poll n, and setting env var
LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES. vgchange/lvchange skip
autoactivation, and defer to pvscan autoactivation.
--systemid String
Changes the system ID of the VG. Using this option requires caution because
the VG may become foreign to the host running the command, leaving the host
unable to access it. See lvmsystemid(7) for more information.
-t|--test
Run in test mode. Commands will not update metadata. This is implemented by
disabling all metadata writing but nevertheless returning success to the
calling function. This may lead to unusual error messages in multi-stage
operations if a tool relies on reading back metadata it believes has changed
but hasn't.
-u|--uuid
Generate new random UUID for specified VGs.
-v|--verbose ...
Set verbose level. Repeat from 1 to 4 times to increase the detail of messages
sent to stdout and stderr.
--version
Display version information.
--[vg]metadatacopies
all|unmanaged|Number
Number of copies of the VG metadata that are kept. VG metadata is kept in VG
metadata areas on PVs in the VG, i.e. reserved space at the start and/or end
of the PVs. Keeping a copy of the VG metadata on every PV can reduce
performance in VGs containing a large number of PVs. When this number is set
to a non-zero value, LVM will automatically choose PVs on which to store
metadata, using the metadataignore flags on PVs to achieve the specified
number. The number can also be replaced with special string values:
unmanaged causes LVM to not automatically manage the PV
metadataignore flags. all causes LVM to first clear the
metadataignore flags on all PVs, and then to become unmanaged.
-y|--yes
Do not prompt for confirmation interactively but always assume the answer yes.
Use with extreme caution. (For automatic no, see -qq.)
VARIABLES
- VG
- Volume Group name. See lvm(8) for valid names.
- Tag
- Tag name. See lvm(8) for information about tag names and using tags in place of a VG, LV or PV.
- Select
- Select indicates that a required positional parameter can be omitted if the --select option is used. No arg appears in this position.
- String
- See the option description for information about the string content.
- Size[UNIT]
- Size is an input number that accepts an optional unit. Input units are always treated as base two values, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024. The default input unit is specified by letter, followed by |UNIT. UNIT represents other possible input units: b|B is bytes, s|S is sectors of 512 bytes, k|K is KiB, m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB. (This should not be confused with the output control --units, where capital letters mean multiple of 1000.)
ENVIRONMENT VARIABLES
See lvm(8) for information about environment variables used by lvm. For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
NOTES
If vgchange recognizes COW snapshot LVs that were dropped because they ran out of space, it displays a message informing the administrator that the snapshots should be removed.
EXAMPLES
Activate all LVs in all VGs on all existing devices.
vgchange -a y
Change the maximum number of LVs for an inactive VG.
vgchange -l 128 vg00
SEE ALSO
lvm(8), lvm.conf(5), lvmconfig(8), lvmdevices(8),
pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8), pvs(8), pvscan(8),
vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgcreate(8), vgconvert(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8),
lvcreate(8), lvchange(8), lvconvert(8), lvdisplay(8), lvextend(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8),
lvm-fullreport(8), lvm-lvpoll(8), blkdeactivate(8), lvmdump(8),
dmeventd(8), lvmpolld(8), lvmlockd(8), lvmlockctl(8), cmirrord(8), lvmdbusd(8), fsadm(8),
lvmsystemid(7), lvmreport(7), lvmcache(7), lvmraid(7), lvmthin(7), lvmvdo(7), lvmautoactivation(7)
LVM TOOLS 2.03.27(2) (2024-10-02) | Red Hat, Inc. |