lvchange(category36-joomla.html) - phpMan

LVCHANGE(8)                 System Manager's Manual                LVCHANGE(8)

NAME
       lvchange - Change the attributes of logical volume(s)
SYNOPSIS
       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
           --lockopt String
           --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
DESCRIPTION
       lvchange  changes LV attributes in the VG, changes LV activation in the
       kernel, and includes other utilities for LV maintenance.
USAGE
       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|any-
           where|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.
       Use to reset 'R' attribute on a not initially synchronized 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 ]
           [    --lockopt String ]
           [    --longhelp ]
           [    --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, in which case an
              LV is activated only if it matches an item in lvm.conf activa-
              tion/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 sys-
              tem boot to make it possible to select which LVs should be auto-
              matically 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 acti-
              vated.  (This does not include the "mirror" type, see "raid1"
              instead.)  partial allows any LV with missing PVs to be acti-
              vated, 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 allo-
              cate 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 infor-
              mation 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 com-
              plete.  writeback considers a write complete as soon as it is
              stored in the cache pool.  writethough considers a write com-
              plete 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 associ-
              ated 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 informa-
              tion.
       --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 meta-
              data.  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 set-
              tings.  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 princi-
              ple.  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.
       --lockopt String
              Used to pass options for special cases to lvmlockd.  See lvm-
              lockd(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.  Set-
              ting 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.  Set-
              ting 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 auto-
              mated 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 set-
              ting.  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 --ver-
              bose.  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 automati-
              cally.  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 hap-
              pens 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 addi-
              tional "selected" field (-o selected) showing 1 if the row
              matches the selection and 0 otherwise.  For non-reporting com-
              mands 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 com-
              mand.  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 dis-
              crepancies 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 func-
              tionality needs to be disabled and this option acts as a short-
              cut which selects an appropriate set of options. Currently, this
              is equivalent to using --ignorelockingfailure, --ignoremonitor-
              ing, --poll n, and setting env var LVM_SUPPRESS_LOCKING_FAIL-
              URE_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 arbitrar-
              ily.
       --[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 behav-
              ior 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.
VARIABLES
       VG
              Volume Group name.  See lvm(8) for valid names.
       LV
              Logical  Volume  name.  See lvm(8) for valid names.  An LV posi-
              tional 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 con-
              tent.
       Size[UNIT]
              Size is an input number that accepts an  optional  unit.   Input
              units are always treated as base two values, regardless of capi-
              talization, e.g. 'k' and 'K' both refer to  1024.   The  default
              input unit is specified by letter, followed by |UNIT.  UNIT rep-
              resents 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.)
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.
EXAMPLES
       Change LV permission to read-only:
       lvchange -pr vg00/lvol1
SEE ALSO
       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) vgcon-
       vert(8)  vgdisplay(8)  vgexport(8)  vgextend(8)  vgimport(8)  vgimport-
       clone(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)  lvre-
       duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
       lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti-
       vate(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)

Red Hat, Inc.      LVM TOOLS 2.02.187(2)-RHEL7 (2020-03-24)        LVCHANGE(8)