Contents
- 1 Is used for adding one or more physical volumes to an existing volume group to extend its size?
- 2 What command would you use to resize an LVM volume group to include an additional physical volume?
- 3 Can a single disk be put into multiple volume groups?
- 4 Can a physical volume be created from a partition?
- 5 Can a storage array contain multiple volume groups?
Is used for adding one or more physical volumes to an existing volume group to extend its size?
To add additional physical volumes to an existing volume group, use the vgextend command. The vgextend command increases a volume group’s capacity by adding one or more free physical volumes.
What command would you use to resize an LVM volume group to include an additional physical volume?
Extend LVM manually
- Extend the physical drive partition: sudo fdisk /dev/vda – Enter the fdisk tool to modify /dev/vda.
- Modify (extend) the LVM: Tell LVM the physical partition size has changed: sudo pvresize /dev/vda1.
- Resize the file system: sudo resize2fs /dev/COMPbase-vg/root.
What is LVM volume group?
A volume group ( VG ) is the central unit of the Logical Volume Manager (LVM) architecture. It is what we create when we combine multiple physical volumes to create a single storage structure, equal to the storage capacity of the combined physical devices.
Can a single disk be put into multiple volume groups?
You can put a single disk into multiple volume groups no problem. Or rather, you can have multiple physical volumes (which just look like a filesystem on a partition to the outside world) with each one belonging to a different volume group.
Can a physical volume be created from a partition?
We can create a physical volume from a disk partition or a whole raw disk. If we intend to use a disk as LVM physical volume only, we don’t need to create partition on it first.
How to manage physical volumes, Volume groups?
In the event a user fills the home volume, the overall system will still be able to write logs, and thus it’s services will continue to run while the sysadmin can handle the user that gone wild. We’ll create two logical volumes, the first called “database” with 2 GB of size, the other called “webserver” with 500 MB of disk space.
Can a storage array contain multiple volume groups?
A storage array can contain one or more volume groups. You can create several volume groups if the drives in your storage array have different characteristics (Data Assurance or Full Disk Encryption), if you want to use different RAID levels, or if you want certain drives to support different applications.