diff options
Diffstat (limited to 'man/lvconvert.8.in')
| -rw-r--r-- | man/lvconvert.8.in | 1199 |
1 files changed, 0 insertions, 1199 deletions
diff --git a/man/lvconvert.8.in b/man/lvconvert.8.in deleted file mode 100644 index 0becc8a89..000000000 --- a/man/lvconvert.8.in +++ /dev/null @@ -1,1199 +0,0 @@ -.TH LVCONVERT 8 "LVM TOOLS #VERSION#" "Red Hat, Inc" \" -*- nroff -*- -.SH NAME -lvconvert \(em change LV type and other utilities -. -.SH SYNOPSIS - -.B lvconvert -.RI [ OPTION ]... -.IR VolumeGroup / LogicalVolume - -OPTIONS: -.br -.BR \-b , -.BR \-\-background -.br -.BR \-\-cachepolicy -.IR Policy -.br -.BR \-\-cachepool -.IR CachePoolLogicalVolume { Name | Path } -.br -.BR \-\-cachesettings -.IB Key = Value -.br -.BR \-c , -.BR \-\-chunksize -.BR \fIChunkSize [ b | B | s | S | k | K | m | M | g | G ] -.br -.BR \-\-corelog -.br -.BR \-\-discards -.RB { ignore | nopassdown | passdown } -.br -.BR \-i , -.BR \-\-interval -.IR Seconds -.br -.BR \-\-merge -.br -.BR \-\-mirrorlog -.RB { disk | core | mirrored } -.br -.BR \-m , -.BR \-\-mirrors -.IR Number -.br -.BR \-n , -.BR \-\-name -.IR Name -.br -.BR \-\-noudevsync -.br -.BR \-\-originname -.IR NewExternalOriginVolumeName -.br -.BR \-\-poolmetadata -.IR PoolMetadataLogicalVolume { Name | Path } -.br -.BR \-\-poolmetadatasize -.BR \fIPoolMetadataSize [ b | B | s | S | k | K | m | M | g | G ] -.br -.BR \-\-poolmetadataspare -.RB { y | n } -.br -.BR \-r , -.BR \-\-readahead -.RB { \fIReadAheadSectors | auto | none } -.br -.BR \-R , -.BR \-\-regionsize -.IR MirrorLogRegionSize -.br -.BR \-\-repair -.br -.BR \-\-replace -.IR PhysicalVolume -.br -.BR \-\-splitcache -.br -.BR \-\-splitmirrors -.IR Number -.br -.BR \-\-splitsnapshot -.br -.BR \-\-stripes -.IR Number -.br -.BR \-I , -.BR \-\-stripesize -.IR StripeSize -.br -.B \-\-type striped -.br -.B \-\-type snapshot -| -.B \-\-snapshot -| -.B \-s -.br -.B \-\-type mirror -.br -.B \-\-type raid* -.br -.B \-\-type thin -| -.B \-\-thin -| -.B \-T -.br -.B \-\-type cache -| -.B \-\-cache -| -.B \-H -.br -.B \-\-type thin\-pool -.br -.B \-\-type cache\-pool -.br -.BR \-\-thinpool -.IR ThinPoolLogicalVolume { Name | Path } -.br -.BR \-\-trackchanges -.br -.BR \-\-uncache -.br -.BR \-Z , -.BR \-\-zero -.RB { y | n } -.br - -Common options: -.br -.BR \-A , -.BR \-\-alloc -.IR AllocationPolicy -.br -.BR \-f , -.BR \-\-force -.br -.BR \-\-commandprofile -.IR ProfileName -.br -.BR \-h , -.BR \-? , -.BR \-\-help -.br -.BR \-v , -.BR \-\-verbose -.br -.BR \-y , -.BR \-\-yes -.br -.BR \-\-version - - - - -.SH DESCRIPTION - -lvconvert changes the LV type and includes various LV utilities. - -To display the current LV type, run the command: - -.B lvs \-o name,segtype -.IR VG / LV - -To change the LV type, run the command: - -.B lvconvert \-\-type -.I NewType -.IR VG / LV - -.SS LV types - -The LV type is also called the "segment type" or "segtype". - -LVs with the following types can be modified by lvconvert: -.B striped, -.B snapshot, -.B mirror, -.B raid*, -.B thin, -.B cache, -.B thin\-pool, -.B cache\-pool. - -The specific operations available on each LV type are listed below. - -The -.B linear -type is equivalent to the -.B striped -type when one stripe exists. -In that case, the types can sometimes be used interchangably. - -In most cases, the -.B mirror -type is deprecated and the -.B raid1 -type should be used. They are both implementations of mirroring. - -The -.B raid* -type refers to one of many raid levels, e.g. -.B raid1, -.B raid5. - -.SS LV layers - -In some cases, an LV is a single device mapper (dm) layer above physical -devices. In other cases, hidden LVs (dm devices) are layered between the -visible LV and physical devices. LVs in the middle layers are sometimes -called sub LVs. - -Changing the LV type will often change the composition of sub LVs. - -Sub LVs can be displayed with the command -.B lvs -a. - -A command run on a visible LV sometimes operates on a sub LV rather than -the specified LV. These cases are noted below. - -Sometimes a sub LV must be specified directly on the command line, but -this is a non-standard form. These cases may change in the future to -avoid the direct use of hidden LVs. - -.SH COMMANDS - -.SS Operations on a StripedLV with type striped or linear: - -\& - -.B lvconvert \-\-merge -VG/StripedLV -./" FIXME: use --merge-mirror -.br -\[bu] -Merge StripedLV into an LV when it is a previously split mirror. -.br -\[bu] -Options \-\-background, \-\-interval. -.br -\[bu] -See corresponding operation --splitmirrors. - -.B lvconvert \-\-type snapshot -VG/StripedLV VG/SnapshotLV -.br -\[bu] -Recombine StripedLV with SnapshotLV which was previously split. -.br -\[bu] -Options \-\-chunksize, \-\-zero. -.br -\[bu] -See corresponding operation --splitsnapshot. - -.B lvconvert \-\-type thin -VG/StripedLV -.br -\[bu] -Convert StripedLV to type thin with an external origin. -.br -\[bu] -StripedLV becomes a read\-only external origin LV with a new name. -.br -\[bu] -Requires \-\-thinpool to specify the thin pool to use. -.br -\[bu] -Options \-\-originname. - -.B lvconvert \-\-type cache -VG/StripedLV -.br -\[bu] -Convert StripedLV to type cache. -.br -\[bu] -Requires \-\-cachepool to specify the cache pool to use. -.br -\[bu] -Options \-\-cachepolicy, \-\-cachesettings. - -.B lvconvert \-\-type thin\-pool -VG/StripedLV -.br -\[bu] -Convert StripedLV to type thin\-pool. -.br -\[bu] -The StripedLV is used for thin pool data. -.br -\[bu] -Options \-\-chunksize, \-\-discards, \-\-poolmetadata{size,spare}, -.br - \-\-readahead, \-\-zero. - -.B lvconvert \-\-type cache\-pool -VG/StripedLV -.br -\[bu] -Convert StripedLV to type cache\-pool. -.br -\[bu] -Options \-\-chunksize, \-\-poolmetadata{size,spare}. - -.B lvconvert \-\-type mirror -VG/StripedLV -.br -\[bu] -Convert StripedLV to type mirror. -.br -\[bu] -Requires \-\-mirrors to specify the number of mirrors to use. -.br -\[bu] -Options \-\-mirrorlog, \-\-regionsize. - -.B lvconvert \-\-type raid* -VG/StripedLV -.br -\[bu] -Convert StripedLV to type raid*. -.br -\[bu] -Required options depend on the raid level. - -.SS Operations on RaidLV with type raid*: - -\& - -.B lvconvert \-\-mirrors -Number -VG/RaidLV -.br -\[bu] -Change the number of images in raid1 RaidLV. - -.B lvconvert \-\-splitmirrors -Number -VG/RaidLV -.br -\[bu] -Split images from raid1 RaidLV and use them to create a new LV. -.br -\[bu] -Requires \-\-name for the new LV, or the use of \-\-trackchanges. - -.B lvconvert \-\-merge -VG/RaidLV -./" FIXME: use --merge-mirror -.br -\[bu] -Merge RaidLV into an LV when it is a previously split mirror. -.br -\[bu] -Options \-\-background, \-\-interval. -.br -\[bu] -See corresponding operation --splitmirrors. - -.B lvconvert \-\-repair -VG/RaidLV -.br -\[bu] -Options \-\-background, \-\-interval. -.br -\[bu] -Replace failed PVs in RaidLV. - -.B lvconvert \-\-replace -PV -VG/RaidLV -.br -\[bu] -Replace specific PV(s) in a raid* LV with another PV. -.br -\[bu] -The new PV(s) to use can be optionally specified after the LV. -.br -\[bu] -Repeat to replace multiple: \-\-replace PV1 \-\-replace PV2 ... - -.B lvconvert \-\-type snapshot -VG/RaidLV -VG/SnapshotLV -.br -\[bu] -Combine RaidLV with SnapshotLV that was previously split. -.br -\[bu] -Options \-\-chunksize, \-\-zero. -.br -\[bu] -See corresponding operation \-\-splitsnapshot. - -.B lvconvert \-\-type thin -VG/RaidLV -.br -\[bu] -Convert RaidLV to type thin with an external origin. -.br -\[bu] -RaidLV becomes a read\-only external origin LV with a new name. -.br -\[bu] -Requires \-\-thinpool to specify the thin pool to use. -.br -\[bu] -Options \-\-originname. - -.B lvconvert \-\-type cache -VG/RaidLV -.br -\[bu] -Convert RaidLV to type cache. -.br -\[bu] -Requires \-\-cachepool to specify the cache pool to use. -.br -\[bu] -Options \-\-cachepolicy, \-\-cachesettings. - -.B lvconvert \-\-type thin\-pool -VG/RaidLV -.br -\[bu] -Convert RaidLV to type thin\-pool. -.br -\[bu] -The RaidLV is used for thin pool data. -.br -\[bu] -Options \-\-chunksize, \-\-discards, \-\-poolmetadata{size,spare}, -.br - \-\-readahead, \-\-zero. - -.B lvconvert \-\-type cache\-pool -VG/RaidLV -.br -\[bu] -Convert RaidLV to type cache\-pool. -.br -\[bu] -Options \-\-chunksize, \-\-poolmetadata{size,spare}. - -.B lvconvert \-\-type raid* -VG/RaidLV -.br -\[bu] -Convert RaidLV to use a different raid level. -.br -\[bu] -Required options depend on the raid level. - -.B lvconvert \-\-type mirror -VG/RaidLV -.br -\[bu] -Convert RaidLV to type mirror. - -.B lvconvert \-\-type striped -VG/RaidLV -.br -\[bu] -Convert RaidLV to type striped. - -.B lvconvert \-\-type linear -VG/RaidLV -.br -\[bu] -Convert RaidLV to type linear. - -.SS Operations on MirrorLV with type mirror: - -\& - -.B lvconvert \-\-mirrors -Number -VG/MirrorLV -.br -\[bu] -Change the number of images in MirrorLV. - -.B lvconvert \-\-splitmirrors -Number -VG/MirrorLV -.br -\[bu] -Split images from MirrorLV and use them to create a new LV. -.br -\[bu] -Requires \-\-name for the new LV. - -.B lvconvert \-\-mirrorlog -LogType -VG/MirrorLV -.br -\[bu] -Change the type of log used by MirrorLV. - -.B lvconvert \-\-repair -VG/MirrorLV -.br -\[bu] -Options \-\-background, \-\-interval. -.br -\[bu] -Replace failed PVs in MirrorLV. - -.B lvconvert \-\-type linear -VG/MirrorLV -.br -\[bu] -Convert MirrorLV to type linear. - -.B lvconvert \-\-type raid* -VG/MirrorLV -.br -\[bu] -Convert MirrorLV to type raid*. -.br -\[bu] -Required options depend on the raid level. - -.SS Operations on CachePoolLV with type cache\-pool: - -\& - -.B lvconvert \-\-splitcache -VG/CachePoolLV -.br -\[bu] -Split the cache LV from CachePoolLV. -.br -\[bu] -Equivalent to --splitcache on CacheLV. - -.SS Operations on CacheLV with type cache: - -\& - -.B lvconvert \-\-splitcache -VG/CacheLV -.br -\[bu] -Split and keep the cache pool from CacheLV. - -.B lvconvert \-\-uncache -VG/CacheLV -.br -\[bu] -Split and remove the cache pool from CacheLV. - -.B lvconvert \-\-splitmirrors -Number -VG/CacheLV -.br -\[bu] -Split images from the mirrored origin of CacheLV to create a new LV. -.br -\[bu] -Operates on mirror or raid1 sub LV. -.br -\[bu] -Requires \-\-name for the new LV, or the use of \-\-trackchanges. - -.B lvconvert \-\-type thin\-pool -VG/CacheLV -.br -\[bu] -Convert CacheLV to type thin-pool. -.br -\[bu] -The CacheLV is used for thin pool data. -.br -\[bu] -Options \-\-chunksize, \-\-discards, \-\-poolmetadata{size,spare}, -.br - \-\-readahead, \-\-zero. - - -.SS Operations on ThinPoolLV with type thin\-pool: - -\& - -.B lvconvert \-\-splitcache -VG/ThinPoolLV -.br -\[bu] -Split and keep the cache pool from the data portion of ThinPoolLV. -.br -\[bu] -Operates on the data sub LV of the thin pool LV. -.br -\[bu] -The data sub LV of the thin pool must be a cache LV. - -.B lvconvert \-\-uncache -VG/ThinPoolLV -.br -\[bu] -Split and remove the cache pool from the data portion of ThinPoolLV. -.br -\[bu] -Operates on the data sub LV of the thin pool LV. -.br -\[bu] -The data sub LV of the thin pool must be a cache LV. - -.B lvconvert \-\-type cache -VG/ThinPoolLV -.br -\[bu] -Convert the data portion of ThinPoolLV to type cache. -.br -\[bu] -Requires \-\-cachepool to specify the cache pool to use. -.br -\[bu] -Operates on the data sub LV of the thin pool LV. -.br -\[bu] -Options \-\-cachepolicy, \-\-cachesettings. - -.B lvconvert \-\-repair -VG/ThinPoolLV -.br -\[bu] -Repair ThinPoolLV. - -.SS Operations on ThinLV with type thin: - -\& - -.B lvconvert \-\-merge -VG/ThinLV -./" FIXME: use --merge-snapshot -.br -\[bu] -Merge ThinLV into its origin LV. -.br -\[bu] -ThinLV must have been created as a snapshot of another thin LV. -.br -\[bu] -Options \-\-background, \-\-interval. - -.SS Operations on SnapshotLV with type snapshot: - -\& - -.B lvconvert \-\-splitsnapshot -VG/SnapshotLV -.br -\[bu] -Separate COW snapshot SnapshotLV from its origin LV. - -.B lvconvert \-\-merge -VG/SnapshotLV -./" FIXME: use --merge-snapshot -.br -\[bu] -Merge COW snapshot SnapshotLV into its origin. -.br -\[bu] -Options \-\-background, \-\-interval. - -.SH OPTIONS -. -See \fBlvm\fP(8) for common options. -.br -. -.HP -.BR \-b , -.BR \-\-background -.br -If the operation requires polling, this option causes the command to -return before the operation is complete, and polling is done in the -background. -. -.HP -.BR \-\-cachepolicy -.IR Policy -.br -Specifies the cache policy for a cache LV. Also see -.BR lvmcache (7). -. -.HP -.BR \-\-cachepool -.IR CachePoolLogicalVolume { Name | Path } -.br -Specifies the cache pool to use when converting an LV to a cache LV. If -CachePoolLogicalVolume is not yet a cache pool, the command will attempt -to convert it into a cache pool prior to the cache LV conversion. -Also see -.BR lvmcache (7). -. -.HP -.BR \-\-cachesettings -.IB Key = Value -.br -Specifies tunable values for a cache LV. (The default values should -usually be adequate.) The special string value \fBdefault\fP switches -settings back to their default kernel values and removes them from the -list of settings stored in LVM metadata. -Also see -.BR lvmcache (7). -. -.HP -.BR \-c , -.BR \-\-chunksize -.BR \fIChunkSize [ b | B | s | S | k | K | m | M | g | G ] -.br -Sets the chunk size for a snapshot, cache pool or thin pool. -The default unit is in kilobytes. -.sp -For snapshots, the value must be a power of 2 between 4KiB and 512KiB -and the default value is 4. -.sp -For a cache pool the value must be between 32KiB and 1GiB and -the default value is 64. -.sp -For a thin pool the value must be between 64KiB and -1GiB and the default value starts with 64 and scales -up to fit the pool metadata size within 128MiB, -if the pool metadata size is not specified. -The value must be a multiple of 64KiB. -(Early kernel support until thin target version 1.4 required the value -to be a power of 2. Discards were not supported for non-power of 2 values -until thin target version 1.5.) -. -.HP -.BR \-\-corelog -.br -Specifies or changes the log type for a mirror LV. -It is an alias for \fB\-\-mirrorlog core\fP. -(This option does not apply to the \fBraid1\fP LV type.) -. -.HP -.BR \-\-discards -.RB { ignore | nopassdown | passdown } -.br -Specifies if discards will be processed by the thin layer in the -kernel and passed down to the Physical Volume. This applies only -to thin pools. The default is \fBpassdown\fP. -Also see -.BR lvmthin (7). -. -.HP -.BR \-H , -.BR \-\-cache -.br -Alias for -.B \-\-type cache. -See COMMANDS description for -.br -.B lvconvert \-\-type cache. -. -.HP -.BR \-i , -.BR \-\-interval -.IR Seconds -.br -Report progress as a percentage at regular intervals. -. -.HP -.BR \-\-merge -.br -Merges a snapshot that was split from an origin LV using -\fB\-\-splitsnapshot\fP, back into the origin LV. - -Merges a raid1 image that was split from a raid1 LV using -\fB\-\-splitsnapshot\fP and \fB\-\-trackchanges\fP, back into -the original raid1 LV. - -To check if the kernel supports the snapshot merge feature, look for -"snapshot\-merge" in the output of \fBdmsetup targets\fP. - -When merging a snapshot, if both the origin and snapshot LVs are not open, -the merge will start immediately. Otherwise, the merge will start the -first time either the origin or snapshot LV are activated and both are -closed. Merging a snapshot into an origin that cannot be closed, for -example a root filesystem, is deferred until the next time the origin -volume is activated. When merging starts, the resulting LV will have the -origin's name, minor number and UUID. While the merge is in progress, -reads or writes to the origin appear as being directed to the snapshot -being merged. When the merge finishes, the merged snapshot is removed. -Multiple snapshots may be specified on the command line or a @tag may be -used to specify multiple snapshots be merged to their respective origin. -. -.HP -.BR \-\-mirrorlog -.RB { disk | core | mirrored } -.br -Specifies or changes the log type for a mirror LV. -The default is \fBdisk\fP, which is persistent and requires -a small amount of storage space, usually on a separate device -from the data being mirrored. -\fBCore\fP may be useful for short-lived mirrors. It means the mirror is -regenerated by copying the data from the first device again every -time the device is activated - e.g. possibly after every reboot. -Using \fBmirrored\fP will create a persistent log that is itself mirrored. -(This option does not apply to the \fBraid1\fP LV type.) -. -.HP -.BR \-m , -.BR \-\-mirrors -.IR Number -.br -Specifies the number mirror images in addition to the original LV image, -e.g. \fB\-\-mirrors 1\fP means two copies of the data, the original and -one mirror image. - -The current maximum is 9 providing 10 raid1 images. - -This option is required when converting an LV to a \fBraid1\fP or -\fBmirror\fP LV. - -This option can be used alone to change the number of mirror images in an -existing \fBraid1\fP or \fBmirror\fP LV. - -The special case \fB\-\-mirrors 0\fP has been used historically to -indicate a linear LV with no mirror images. -. -.HP -.BR \-n , -.BR \-\-name -.IR Name -.br -Specifies the name to use when the command is creating a new LV, e.g. -.B \-\-splitmirrors. -. -.HP -.BR \-\-noudevsync -.br -Disables udev synchronisation. The process will not wait for notification -from udev. It will continue irrespective of any possible udev processing -in the background. You should only use this if udev is not running or has -rules that ignore the devices LVM creates. -. -.HP -.BR \-\-originname -.IR NewExternalOriginVolumeName -.br -Specifies the name to use for the external origin LV when converting an LV -to a thin LV. The LV being converted becomes a read\-only external origin -with this name. -.br -Without this option, the default name of "lvol<n>" will be generated where -<n> is the LVM internal number of the LV. -.br -. -.\" .HP -.\" .BR \-\-pooldatasize -.\" .IR PoolDataVolumeSize [ \fBbBsSkKmMgGtTpPeE ] -.\" .br -.\" Sets the size of pool's data logical volume. -.\" The option \fB\-\-size\fP could be still used with thin pools. -. -.HP -.BR \-\-poolmetadata -.IR PoolMetadataLogicalVolume { Name | Path } -.br -Specifies the LV to use for thin pool metadata when converting an LV to a -thin pool LV. -.br -Specifies the LV to use for cache pool metadata when converting an LV to a -cache pool LV. -.br -The size should be between 2MiB and 16GiB. -.br -(This option can also be used when a thin pool or cache pool are created -as an auxiliary operation within a different command.) -Also see -.BR lvmthin (7), -and -.BR lvmcache (7). -. -.HP -.BR \-\-poolmetadatasize -.BR \fIPoolMetadataSize [ b | B | s | S | k | K | m | M | g | G ] -.br -Specifies the size of a cache pool metadata LV or a thin pool metadata LV. -This is used if a command creates a pool metadata LV automatically as part -of the operation. This option is not used when an existing LV is -specified as the pool metadata LV, i.e. \fB\-\-poolmetadata\fP. -The default unit is megabytes. -Also see -.BR lvmthin (7), -and -.BR lvmcache (7). -. -.HP -.BR \-\-poolmetadataspare -.RB { y | n } -.br -Specifies if a spare pool metadata LV should be created. -A spare pool metadata LV will be used for pool repair. -Only one spare pool metadata LV is maintained within a VG, with the size -of the largest existing pool metadata LV. -The default is \fBy\fPes. -. -.HP -.BR \-r , -.BR \-\-readahead -.RB { \fIReadAheadSectors | auto | none } -.br -Specifies the read ahead sector count of a thin pool metadata LV. -The default value is \fBauto\fP which allows the kernel to choose -a suitable value automatically. -\fBNone\fP is equivalent to specifying zero. -. -.HP -.BR \-R , -.BR \-\-regionsize -.IR MirrorLogRegionSize -.br -A mirror LV is divided into regions of this size (in MB), and the mirror -log uses this granularity to track which regions are in sync. -(This option does not apply to the \fBraid1\fP LV type.) -. -.HP -.BR \-\-repair -.br -Replaces failed PVs in a raid1 or mirror LV with other PVs available in -the VG. By default, the original number of mirror images will be restored -if possible. Specify \fB\-y\fP on the command line to skip the prompts. -Use \fB\-f\fP if you do not want any replacement. You may use -\fB\-\-use\-policies\fP to use the device replacement policy specified in -\fBlvm.conf\fP(5), see \fBactivation/mirror_log_fault_policy\fP or -\fBactivation/mirror_device_fault_policy\fP. - -When used with a thin pool LV, this option automates the use of the -\fBthin_repair\fP(8) tool on the thin pool. This repairs a very limitted -number of problems. Only inactive thin pools can be repaired. There is -no validation of metadata between kernel and LVM. This requires further -manual work. After successfull repair the old unmodified metadata are -still available in "<pool>_meta<n>" LV. -Also see -.BR lvmthin (7). -. -.HP -.BR \-\-replace -.IR PhysicalVolume -.br -Remove the specified device \fIPhysicalVolume\fP and replace it with one -that is available in the VG, or from a specific list of PVs specified on -the command line following the LV name. This option may be repeated multiple -times depending on the RaidLV type. -. -.HP -.BR \-s , -.BR \-\-snapshot -.br -Alias for -.B \-\-type snapshot. -See COMMANDS description for -.br -.B lvconvert \-\-type snapshot. -.HP -.BR \-\-split -.br -Separates \fISplitableLogicalVolume\fP. -This option tries to detect the necessary split operation from its arguments. -Avoid using this option and use one of the following instead: -.B \-\-splitcache, \-\-splitmirrors, \-\-splitsnapshot. -. -.HP -.BR \-\-splitcache -.br -Separates a cache pool from a cache LV, and keeps the unused cache pool -LV. Before the separation, the cache is flushed. See similar option -.B \-\-uncache. -Also see -.BR lvmcache (7). -. -.HP -.BR \-\-splitmirrors -.IR Number -.br -Splits the specified number of images from a \fBraid1\fP or \fBmirror\fP -LV and uses them to create a new LV. - -If \fB\-\-trackchanges\fP is also specified, changes to the raid1 LV are -tracked while the split LV remains detached. -.B lvconvert \-\-merge -can be used to recombine the split images with the original raid1 LV. - -A name can be specified for the new LV with \fB\-\-name\fP (a name is -required without \fB\-\-trackchanges\fP). -. -.HP -.BR \-\-splitsnapshot -.br -Separates a COW snapshot from its origin LV. The LV that is split off -contains the chunks that differ from the origin LV along with metadata -describing them. This LV can be wiped and then destroyed with lvremove. -See corresponding operation -.B lvconvert \-\-type snapshot. -. -.HP -.BR \-\-stripes -.IR Number -.br -Specifies the number of stripes in a striped LV. This is the number of -physical volumes (devices) that a striped LV is spread across. Data that -appears sequential in the LV is spread across multiple devices in units of -the stripe size (see \fB\-\-stripesize\fP). This does not apply to -existing allocated space, only newly allocated space can be striped. -. -.HP -.BR \-I , -.BR \-\-stripesize -.IR StripeSize -.br -Specifies the stripe size in kilobytes for a striped LV. The stripe size -is the number of kilobytes written to each stripe, i.e. to one device, -before writing to the next stripe/device. StripeSize must be a power of 2 -and cannot exceed the VG physical extent (PE) size. -. -.HP -.BR \-\-type -.IR SegmentType -.br -Converts an LV from one segment type to another. -See COMMANDS section for a description of converting between each type. -. -.HP -.BR \-\-thinpool -.IR ThinPoolLogicalVolume { Name | Path } -.br -Specifies the thin pool to use when converting an LV to a thin LV. If -ThinPoolLogicalVolume is not yet a thin pool, the command will attempt to -convert it to a thin pool prior to the thin LV conversion. -Also see -.BR lvmthin (7). -. -.HP -.BR \-\-trackchanges -.br -Can be used with \fB\-\-splitmirrors\fP on a raid1 LV. This causes -changes to the original raid1 LV to be tracked while the split images -remain detached. This allows the read\-only detached image(s) to be -merged efficiently back into the raid1 LV later. Only the regions with -changed data are resynchronized during merge. (This option only applies -to the \fBraid1\fP LV type.) -. -.HP -.BR \-T , -.BR \-\-thin -.br -Alias for -.B \-\-type thin. -See COMMANDS description for -.br -.B lvconvert \-\-type thin. -. -.HP -.BR \-\-uncache -.br -Separates a cache pool from a cache LV, and removes the unused cache pool -LV. Before the separation, the cache is flushed. See similar option -.B \-\-splitcache. -Also see -.BR lvmcache (7). -. -.HP -.BR \-Z , -.BR \-\-zero -.RB { y | n } -.br -For snapshots, this controls zeroing of the first 4KiB of data in the -snapshot. If the LV is read\-only, the snapshot will not be zeroed. - -For thin pools, this controls zeroing of provisioned blocks. -Provisioning of large zeroed chunks negatively impacts performance. -Also see -.BR lvmthin (7). -. - -.SH Examples -. -Convert a linear LV to a two-way mirror LV: -.br -.B lvconvert \-\-type mirror \-\-mirrors 1 vg/lvol1 - -Convert a linear LV to a two-way RAID1 LV: -.br -.B lvconvert \-\-type raid1 \-\-mirrors 1 vg/lvol1 - -Convert a mirror LV to use an in\-memory log: -.br -.B lvconvert \-\-mirrorlog core vg/lvol1 - -Convert a mirror LV to use a disk log: -.br -.B lvconvert \-\-mirrorlog disk vg/lvol1 - -Convert a mirror or raid1 LV to a linear LV: -.br -.B lvconvert --type linear vg/lvol1 - -Convert a mirror LV to a raid1 LV with the same number of images: -.br -.B lvconvert \-\-type raid1 vg/lvol1 - -./" Split and merge a COW snapshot: -./" TODO -Convert a linear LV to a two-way mirror LV, allocating new extents from specific -PV ranges: -.br -.B lvconvert \-\-mirrors 1 vg/lvol1 /dev/sda:0\-15 /dev/sdb:0\-15 - -Convert a mirror LV to a linear LV, freeing physical extents from a specific PV: -.br -.B lvconvert \-\-type linear vg/lvol1 /dev/sda - -Split one image from a mirror or raid1 LV, making it a new LV: -.br -.B lvconvert \-\-splitmirrors 1 \-\-name lv_split vg/lvol1 - -Split one image from a raid1 LV, and track changes made to the raid1 LV -while the split image remains detached: -.br -.B lvconvert \-\-splitmirrors 1 \-\-trackchanges vg/lvol1 - -Merge an image (that was previously created with \-\-splitmirrors and -\-\-trackchanges) back into the original raid1 LV: -.br -.B lvconvert \-\-merge vg/lvol1_rimage_1 -./" FIXME: use merge-mirror - -Replace PV /dev/sdb1 with PV /dev/sdf1 in a raid1/4/5/6/10 LV: -.br -.B lvconvert \-\-replace /dev/sdb1 vg/lvol1 /dev/sdf1 - -Replace 3 PVs /dev/sd[b-d]1 with PVs /dev/sd[f-h]1 in a raid1 LV: -.br -.B lvconvert \-\-replace /dev/sdb1 \-\-replace /dev/sdc1 \-\-replace /dev/sdd1 -.RS -.B vg/lvol1 /dev/sd[fgh]1 -.RE - -Replace the maximum of 2 PVs /dev/sd[bc]1 with PVs /dev/sd[gh]1 in a raid6 LV: -.br -.B lvconvert \-\-replace /dev/sdb1 \-\-replace /dev/sdc1 vg/lvol1 /dev/sd[gh]1 - -Convert an LV into a thin LV in the specified thin pool. The existing LV -is used as an external read\-only origin for the new thin LV. -.br -.B lvconvert \-\-type thin \-\-thinpool vg/tpool1 vg/lvol1 - -Convert an LV into a thin LV in the specified thin pool. The existing LV -is used as an external read\-only origin for the new thin LV, and is -renamed "external": -.br -.B lvconvert \-\-type thin \-\-thinpool vg/tpool1 -.RS -.B \-\-originname external vg/lvol1 -.RE - -Convert an LV to a cache pool LV using another specified LV for cache pool -metadata: -.br -.B lvconvert \-\-type cache-pool \-\-poolmetadata vg/poolmeta1 vg/lvol1 - -Convert an LV to a cache LV using the specified cache pool and chunk size: -.br -.B lvconvert \-\-type cache \-\-cachepool vg/cpool1 \-c 128 vg/lvol1 - -Detach and keep the cache pool from a cache LV: -.br -.B lvconvert \-\-splitcache vg/lvol1 - -Detach and remove the cache pool from a cache LV: -.br -.B lvconvert \-\-uncache vg/lvol1 - -.SH SEE ALSO -.BR lvm (8), -.BR lvm.conf (5), -.BR lvmcache (7), -.BR lvmthin (7), -.BR lvdisplay (8), -.BR lvextend (8), -.BR lvreduce (8), -.BR lvremove (8), -.BR lvrename (8), -.BR lvscan (8), -.BR vgcreate (8), -.BR cache_dump (8), -.BR cache_repair (8), -.BR cache_restore (8), -.BR thin_dump (8), -.BR thin_repair (8), -.BR thin_restore (8) |