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GNU/Linux |
CentOS 4.8 |
i386 |
 |
lvconvert(8) |
 |
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]
[−i|−−interval Seconds]
[−h|−?|−−help]
[−v|−−verbose] [−−version]
LogicalVolume[Path] [PhysicalVolume[Path]...]
lvconvert
−s|−−snapshot
[−c|−−chunksize ChunkSize]
[−h|−?|−−help]
[−v|−−verbose]
[−Z|−−zero y|n] [−−version]
OriginalLogicalVolume[Path] SnapshotLogicalVolume[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.
See lvm
for common options.
Exactly one of −−mirrors 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 copy.
−−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.
−−corelog
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 sync.
−b, −−background
Run the daemon in the background.
−i, −−interval Seconds
Report progress as a percentage at regular intervals.
−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 "vg00/lvol1"
lvm(8), vgcreate(8), lvremove(8), lvrename(8), lvextend(8), lvreduce(8), lvdisplay(8), lvscan(8)
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lvconvert(8) | |