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How do you create a logical volume inside a volume group?
Procedure
- Create a LVM VG, if you do not have an existing one: Log into the RHEL KVM hypervisor host as root. Add a new LVM partition using the fdisk command.
- Create a LVM LV on the VG. For example, to create an LV called kvmVM under the /dev/VolGroup00 VG, run:
- Repeat the above VG and LV steps on each hypervisor host.
Can we create mirrored logical volume?
With LVM, you can create mirrored logical volumes with multiple mirrors. An LVM mirror divides the device being copied into regions that are typically 512KB in size.
How do you convert linear volume to mirror volume?
“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.
How to create logical volume in volume group?
In order to create a logical volume in a volume group, you have to use the “lvcreate” command, specify the name of the logical volume and the volume group that it belongs to. In order to specify the space to be taken, you have to use the “ -L ” option and specify a size (composed of a number and its unit)
How are logical volumes created in a LVM?
The physical volumes can be combined into a Volume Group (VG). This creates a pool of disk space out of which LVM logical volumes (LVs) can be allocated. A top logical volumes, regular file systems, such as ext4, xfs, etc. can then be created. This process is comparable to the how disks are divided into partitions.
How do I list logical volumes in Linux?
Again, you can list your newly created logical volume by running the “lvs” command as sudo. By running the “lvs” command, you are presented with many different columns : Other columns are describing advanced usage of LVM such as setting up mirrored spaces or striped ones.
Do you have to worry about physical volumes in LVM?
Practically, you should not have to worry about physical extents too much : LVM always makes sure that the mapping between physical extents and the logical volumes is preserved. Now that you have created your first volume group, it is time to create your first logical volume to store data.