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       lvconvert - convert a logical volume from linear to mirror or snapshot


       lvconvert  -m|--mirrors  Mirrors  [--mirrorlog {disk|core}] [--corelog]
       [-R|--regionsize  MirrorLogRegionSize]  [-A|--alloc   AllocationPolicy]
       [-b|--background]  [-f|--force]  [-i|--interval Seconds] [-h|-?|--help]
       [--noudevsync] [-v|--verbose] [-y|--yes] [--version]
       LogicalVolume[Path] [PhysicalVolume[Path][:PE[-PE]]...]

       lvconvert  -s|--snapshot  [-c|--chunksize   ChunkSize]   [-h|-?|--help]
       [--noudevsync] [-v|--verbose] [-Z|--zero y|n] [--version]
       OriginalLogicalVolume[Path] SnapshotLogicalVolume[Path]

       lvconvert    --repair    [-h|-?|--help]    [-v|--verbose]   [--version]
       LogicalVolume[Path] [PhysicalVolume[Path]...]


       lvconvert will change a linear  logical  volume  to  a  mirror  logical
       volume  or  to  a snapshot of linear volume and vice versa.  It is also
       used to add and remove disk logs from mirror devices.
       If the conversion requires allocation of physical extents (for example,
       when  converting  from  linear  to  mirror) and you specify one or more
       PhysicalVolumes  (optionally  with   ranges   of   physical   extents),
       allocation  of  physical  extents  will be restricted to these physical
       extents.  If the conversion frees physical extents (for  example,  when
       converting  from a mirror to a linear, or reducing mirror legs) and you
       specify one or more PhysicalVolumes, the freed extents come first  from
       the specified PhysicalVolumes.


       See lvm for common options.
       Exactly one of --mirrors, --repair or --snapshot arguments required.

       -m, --mirrors Mirrors
              Specifies  the  degree  of  the  mirror you wish to create.  For
              example, "-m 1" would convert the original logical volume  to  a
              mirror  volume  with  2-sides; that is, a linear volume plus one

       --mirrorlog {disk|core}
              Specifies the type of log to use.  The default is disk, which is
              persistent and requires a small amount of storage space, usually
              on a separate device from the data being mirrored.  Core 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 - perhaps, for example, after
              every reboot.

              The optional argument "--corelog"  is  the  same  as  specifying
              "--mirrorlog core".

       -R, --regionsize MirrorLogRegionSize
              A  mirror  is divided into regions of this size (in MB), and the
              mirror log uses this granularity to track which regions  are  in

       -b, --background
              Run the daemon in the background.

       -i, --interval Seconds
              Report progress as a percentage at regular intervals.

              Disable  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
              LVM2 creates.

              Repair  a mirror after suffering a disk failure. The mirror will
              be brought back  into  a  consistent  state.   By  default,  the
              original  number  of  mirrors  will  be  restored  if  possible.
              Specify -y on the command line to skip the prompts.  Use  -f  if
              you  do  not  want  any  replacement.  Additionally, you may use
              --use-policies to use the device replacement policy specified in
              lvm.conf,     viz.     activation/mirror_log_fault_policy     or

       -s, --snapshot
              Create a snapshot from existing  logical  volume  using  another
              existing logical volume as its origin.

       -c, --chunksize ChunkSize
              Power of 2 chunk size for the snapshot logical volume between 4k
              and 512k.

       -Z, --zero y|n
              Controls zeroing of the first KB of data in  the  snapshot.   If
              the volume is read-only the snapshot will not be zeroed.


       "lvconvert -m1 vg00/lvol1"
       converts  the  linear  logical  volume "vg00/lvol1" to a two-way mirror
       logical volume.

       "lvconvert --mirrorlog core vg00/lvol1"
       converts a mirror with a disk log to a mirror with an in-memory log.

       "lvconvert --mirrorlog disk vg00/lvol1"
       converts a mirror with an in-memory log to a mirror with a disk log.

       "lvconvert -m0 vg00/lvol1"
       converts a mirror logical volume to a linear logical volume.

       "lvconvert -s vg00/lvol1 vg00/lvol2"
       converts logical volume "vg00/lvol2" to  snapshot  of  original  volume

       "lvconvert -m1 vg00/lvol1 /dev/sda:0-15 /dev/sdb:0-15"
       converts  linear logical volume "vg00/lvol1" to a two-way mirror, using
       physical extents /dev/sda:0-15 and /dev/sdb:0-15 for allocation of  new

       "lvconvert -m0 vg00/lvmirror1 /dev/sda
       converts  mirror  logical  volume  "vg00/lvmirror1"  to linear, freeing
       physical extents from /dev/sda.


       lvm(8),    vgcreate(8),    lvremove(8),    lvrename(8),    lvextend(8),
       lvreduce(8), lvdisplay(8), lvscan(8)