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NAME | SYNOPSIS | DESCRIPTION | USAGE | OPTIONS | VARIABLES | ENVIRONMENT VARIABLES | EXAMPLES | SEE ALSO | COLOPHON |
LVCHANGE(8) System Manager's Manual LVCHANGE(8)
lvchange - Change the attributes of logical volume(s)
lvchange option_args position_args
[ option_args ]
-a|--activate y|n|ay
--activationmode partial|degraded|complete
--addtag Tag
--alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
-A|--autobackup y|n
--cachemode writethrough|writeback|passthrough
--cachepolicy String
--cachesettings String
--commandprofile String
--config String
-C|--contiguous y|n
-d|--debug
--deltag Tag
--detachprofile
--discards passdown|nopassdown|ignore
--driverloaded y|n
--errorwhenfull y|n
-f|--force
-h|--help
-K|--ignoreactivationskip
--ignorelockingfailure
--ignoremonitoring
--ignoreskippedcluster
--longhelp
-j|--major Number
--[raid]maxrecoveryrate Size[k|UNIT]
--metadataprofile String
--minor Number
--[raid]minrecoveryrate Size[k|UNIT]
--monitor y|n
--noudevsync
-P|--partial
-p|--permission rw|r
-M|--persistent y|n
--poll y|n
--profile String
-q|--quiet
-r|--readahead auto|none|Number
--rebuild PV
--refresh
--reportformat basic|json
--resync
-S|--select String
-k|--setactivationskip y|n
--[raid]syncaction check|repair
--sysinit
-t|--test
-v|--verbose
--version
--[raid]writebehind Number
--[raid]writemostly PV[:t|n|y]
-y|--yes
-Z|--zero y|n
lvchange changes LV attributes in the VG, changes LV activation in
the kernel, and includes other utilities for LV maintenance.
Change a general LV attribute.
For options listed in parentheses, any one is
required, after which the others are optional.
lvchange
( -C|--contiguous y|n,
-p|--permission rw|r,
-r|--readahead auto|none|Number,
-k|--setactivationskip y|n,
-Z|--zero y|n,
-M|--persistent n,
--addtag Tag,
--deltag Tag,
--alloc
contiguous|cling|cling_by_tags|normal|anywhere|inherit,
--detachprofile,
--metadataprofile String,
--profile String,
--errorwhenfull y|n,
--discards passdown|nopassdown|ignore,
--cachemode writethrough|writeback|passthrough,
--cachepolicy String,
--cachesettings String,
--[raid]minrecoveryrate Size[k|UNIT],
--[raid]maxrecoveryrate Size[k|UNIT],
--[raid]writebehind Number,
--[raid]writemostly PV[:t|n|y] )
VG|LV|Tag|Select ...
[ -a|--activate y|n|ay ]
[ --poll y|n ]
[ --monitor y|n ]
[ COMMON_OPTIONS ]
-
Resyncronize a mirror or raid LV.
lvchange --resync VG|LV_mirror_raid|Tag|Select ...
[ -a|--activate y|n|ay ]
[ COMMON_OPTIONS ]
-
Resynchronize or check a raid LV.
lvchange --syncaction check|repair VG|LV_raid|Tag|Select ...
[ COMMON_OPTIONS ]
-
Reconstruct data on specific PVs of a raid LV.
lvchange --rebuild PV VG|LV_raid|Tag|Select ...
[ COMMON_OPTIONS ]
-
Activate or deactivate an LV.
lvchange -a|--activate y|n|ay VG|LV|Tag|Select ...
[ -P|--partial ]
[ -K|--ignoreactivationskip ]
[ --activationmode partial|degraded|complete ]
[ --poll y|n ]
[ --monitor y|n ]
[ --ignorelockingfailure ]
[ --sysinit ]
[ COMMON_OPTIONS ]
-
Reactivate an LV using the latest metadata.
lvchange --refresh VG|LV|Tag|Select ...
[ -P|--partial ]
[ --activationmode partial|degraded|complete ]
[ --poll y|n ]
[ --monitor y|n ]
[ COMMON_OPTIONS ]
-
Start or stop monitoring an LV from dmeventd.
lvchange --monitor y|n VG|LV|Tag|Select ...
[ COMMON_OPTIONS ]
-
Start or stop processing an LV conversion.
lvchange --poll y|n VG|LV|Tag|Select ...
[ --monitor y|n ]
[ COMMON_OPTIONS ]
-
Make the minor device number persistent for an LV.
lvchange -M|--persistent y --minor Number LV
[ -j|--major Number ]
[ -a|--activate y|n|ay ]
[ --poll y|n ]
[ --monitor y|n ]
[ COMMON_OPTIONS ]
-
Common options for command:
[ -A|--autobackup y|n ]
[ -f|--force ]
[ -S|--select String ]
[ --ignoremonitoring ]
[ --ignoreskippedcluster ]
[ --noudevsync ]
[ --reportformat basic|json ]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --driverloaded y|n ]
[ --longhelp ]
[ --profile String ]
[ --version ]
-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, in which case an LV is activated only if it
matches an item in lvm.conf
activation/auto_activation_volume_list. If the list is not
set, all LVs are considered to match, and if if the list is
set but empty, no LVs match. Autoactivation should be used
during system boot to make it possible to select which LVs
should be automatically activated by the system. See
lvmlockd(8) for more information about activation options ey
and sy for shared VGs. See clvmd(8) for more information
about activation options ey, sy, ly and ln for clustered 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/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 overriden 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.
--config String
Config settings for the command. These override lvm.conf
settings. The String arg uses the same format as lvm.conf, 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).
--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.
--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.
--ignoreskippedcluster
Use to avoid exiting with an non-zero status code if the
command is run without clustered locking and clustered VGs are
skipped.
--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.
--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 lvm.conf 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.
--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.
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.
--[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
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. When used in
conjunction with lvmetad enabled and running,
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.
VG
Volume Group name. See lvm(8) for valid names.
LV
Logical Volume name. See lvm(8) for valid names. An LV
positional arg generally includes the VG name and LV name,
e.g. VG/LV. LV followed by _<type> indicates that an LV of
the given type is required. (raid represents raid<N> type)
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: bBsSkKmMgGtTpPeE.
b|B is bytes, s|S is sectors of 512 bytes, k|K is kilobytes,
m|M is megabytes, g|G is gigabytes, t|T is terabytes, p|P is
petabytes, e|E is exabytes. (This should not be confused with
the output control --units, where capital letters mean
multiple of 1000.)
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.
Change LV permission to read-only:
lvchange -pr vg00/lvol1
lvm(8) lvm.conf(5) lvmconfig(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) 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) lvm2-activation-generator(8)
blkdeactivate(8) lvmdump(8)
dmeventd(8) lvmetad(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) clvmd(8)
cmirrord(8) lvmdbusd(8)
lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)
This page is part of the lvm2 (Logical Volume Manager 2) project.
Information about the project can be found at
⟨http://www.sourceware.org/lvm2/⟩. If you have a bug report for this
manual page, send it to linux-lvm@redhat.com. This page was obtained
from the project's upstream Git repository
⟨git://sourceware.org/git/lvm2.git⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Red Hat, Inc. LVM TOOLS 2.02.173(2)-git (2017-06-28) LVCHANGE(8)
Pages that refer to this page: lvmcache(7), lvmthin(7), lvchange(8), lvconvert(8), lvcreate(8), lvdisplay(8), lvextend(8), lvm2-activation-generator(8), lvm(8), lvmconfig(8), lvmdiskscan(8), lvm-fullreport(8), lvm-lvpoll(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(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), vgconvert(8), vgcreate(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8)