GNU/Linux man pages
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GNU/Linux |
CentOS 5.1 |
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lvconvert(8) |
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lvconvert − convert a logical volume from linear to mirror or snapshot
lvconvert
−m/−−mirrors Mirrors
[−−corelog] [−R/−−regionsize
MirrorLogRegionSize] [−A/−−alloc
AllocationPolicy] [−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.
−−corelog
This optional argument tells lvconvert to switch the mirror from using a disk-based (persistent) log to an in-memory log. You may only specify this option when the −−mirror argument is the same degree of the mirror you are changing.
−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.
−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 mirror logical volume. This command could also be used to
convert a two-way mirror with an in-memory log to a two-way
mirror with a disk log.
"lvconvert
-m1 --corelog vg00/lvol1"
converts a two-way mirror with a disk log to a two-way
mirror with an in-memory 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) | |