-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.
-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.
--cachemode writethrough|writeback|passthrough
Specifies when writes to a cache LV should be considered
complete. writeback considers a write complete as soon as
it is stored in the cache pool. writethough considers a
write complete only when it has been stored in both the
cache pool and on the origin LV. While writethrough may
be slower for writes, it is more resilient if something
should happen to a device associated with the cache pool
LV. With passthrough, all reads are served from the origin
LV (all reads miss the cache) and all writes are forwarded
to the origin LV; additionally, write hits cause cache
block invalidates. See lvmcache(7) for more information.
--cachepolicy String
Specifies the cache policy for a cache LV. See
lvmcache(7) for more information.
--cachesettings String
Specifies tunable values for a cache LV in "Key = Value"
form. Repeat this option to specify multiple values.
(The default values should usually be adequate.) The
special string value default switches settings back to
their default kernel values and removes them from the list
of settings stored in LVM metadata. See lvmcache(7) for
more information.
--commandprofile String
The command profile to use for command configuration. See
lvm.conf(5) for more information about profiles.
--compression y|n
Controls whether compression is enabled or disable for VDO
volume. See lvmvdo(7) for more information about VDO
usage.
--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.
-C|--contiguous y|n
Sets or resets the contiguous allocation policy for LVs.
Default is no contiguous allocation based on a next free
principle. It is only possible to change a non-contiguous
allocation policy to contiguous if all of the allocated
physical extents in the LV are already contiguous.
-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).
--deduplication y|n
Controls whether deduplication is enabled or disable for
VDO volume. See lvmvdo(7) for more information about VDO
usage.
--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
Devices that the command can use. 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.
--discards passdown|nopassdown|ignore
Specifies how the device-mapper thin pool layer in the
kernel should handle discards. ignore causes the thin
pool to ignore discards. nopassdown causes the thin pool
to process discards itself to allow reuse of unneeded
extents in the thin pool. passdown causes the thin pool
to process discards itself (like nopassdown) and pass the
discards to the underlying device. See lvmthin(7) for
more information.
--driverloaded y|n
If set to no, the command will not attempt to use device-
mapper. For testing and debugging.
--errorwhenfull y|n
Specifies thin pool behavior when data space is exhausted.
When yes, device-mapper will immediately return an error
when a thin pool is full and an I/O request requires
space. When no, device-mapper will queue these I/O
requests for a period of time to allow the thin pool to be
extended. Errors are returned if no space is available
after the timeout. (Also see dm-thin-pool kernel module
option no_space_timeout.) See lvmthin(7) for more
information.
-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.
--lockopt String
Used to pass options for special cases to lvmlockd. See
lvmlockd(8) for more information.
--longhelp
Display long help text.
-j|--major Number
Sets the major number of an LV block device.
--[raid]maxrecoveryrate Size[k|UNIT]
Sets the maximum recovery rate for a RAID LV. The rate
value is an amount of data per second for each device in
the array. Setting the rate to 0 means it will be
unbounded. See lvmraid(7) for more information.
--metadataprofile String
The metadata profile to use for command configuration.
See lvm.conf(5) for more information about profiles.
--minor Number
Sets the minor number of an LV block device.
--[raid]minrecoveryrate Size[k|UNIT]
Sets the minimum recovery rate for a RAID LV. The rate
value is an amount of data per second for each device in
the array. Setting the rate to 0 means it will be
unbounded. See lvmraid(7) for more information.
--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 reponse to specific
events. See dmeventd(8) for more information.
--nolocking
Disable locking.
--noudevsync
Disables udev synchronisation. 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.
-p|--permission rw|r
Set access permission to read only r or read and write rw.
-M|--persistent y|n
When yes, makes the specified minor number persistent.
--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.
-q|--quiet ...
Suppress output and log messages. Overrides --debug and
--verbose. Repeat once to also suppress any prompts with
answer 'no'.
-r|--readahead auto|none|Number
Sets read ahead sector count of an LV. auto is the
default which allows the kernel to choose a suitable value
automatically. none is equivalent to zero.
--readonly
Run the command in a special read-only mode which will
read on-disk metadata without needing to take any locks.
This can be used to peek inside metadata used by a virtual
machine image while the virtual machine is running. No
attempt will be made to communicate with the device-mapper
kernel driver, so this option is unable to report whether
or not LVs are actually in use.
--rebuild PV
Selects a PV to rebuild in a raid LV. Multiple PVs can be
rebuilt by repeating this option. Use this option in
place of --resync or --syncaction repair when the PVs with
corrupted data are known, and their data should be
reconstructed rather than reconstructing default
(rotating) data. See lvmraid(7) for more information.
--refresh
If the LV is active, reload its metadata. This is not
necessary in normal operation, but may be useful if
something has gone wrong, or if some form of manual LV
sharing is being used.
--reportformat basic|json
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. See lvmreport(7) for more information.
--resync
Initiates mirror synchronization. Synchronization
generally happens automatically, but this option forces it
to run. Also see --rebuild to synchronize a specific PV.
During synchronization, data is read from the primary
mirror device and copied to the others. This can take
considerable time, during which the LV is without a
complete redundant copy of the data. See lvmraid(7) for
more information.
-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.
-k|--setactivationskip y|n
Persistently sets (yes) or clears (no) the "activation
skip" flag on an LV. An LV with this flag set is not
activated unless the --ignoreactivationskip option is used
by the activation command. This flag is set by default on
new thin snapshot LVs. The flag is not applied to
deactivation. The current value of the flag is indicated
in the lvs lv_attr bits.
--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.
--[raid]syncaction check|repair
Initiate different types of RAID synchronization. This
causes the RAID LV to read all data and parity blocks in
the array and check for discrepancies (mismatches between
mirrors or incorrect parity values). check will count but
not correct discrepancies. repair will correct
discrepancies. See lvs(8) for reporting discrepancies
found or repaired.
--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.
-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.
-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.
--[raid]writebehind Number
The maximum number of outstanding writes that are allowed
to devices in a RAID1 LV that is marked write-mostly.
Once this value is exceeded, writes become synchronous
(i.e. all writes to the constituent devices must complete
before the array signals the write has completed). Setting
the value to zero clears the preference and allows the
system to choose the value arbitrarily.
--[raid]writemostly PV[:t|n|y]
Mark a device in a RAID1 LV as write-mostly. All reads to
these drives will be avoided unless absolutely necessary.
This keeps the number of I/Os to the drive to a minimum.
The default behavior is to set the write-mostly attribute
for the specified PV. It is also possible to remove the
write-mostly flag by adding the suffix :n at the end of
the PV name, or to toggle the value with the suffix :t.
Repeat this option to change the attribute on multiple
PVs.
-y|--yes
Do not prompt for confirmation interactively but always
assume the answer yes. Use with extreme caution. (For
automatic no, see -qq.)
-Z|--zero y|n
Set zeroing mode for thin pool. Note: already provisioned
blocks from pool in non-zero mode are not cleared in
unwritten parts when setting --zero y.
