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Which partition type is used for LVM physical volume?
And it is LVM (8e) type partition, mentioned by timberman. This single (physical) disk partition can hold logical volumes within a group. I have two disks so there are two such groups and each group holds two logical devices.
What is physical and logical volume?
Physical volumes are managed by logical volumes. A logical volume presents a user with a contiguous address space; that is, a logical volume simulates one large contiguous storage space by using regions of different disks.
Why do we use LVM?
Uses. LVM is used for the following purposes: Creating single logical volumes of multiple physical volumes or entire hard disks (somewhat similar to RAID 0, but more similar to JBOD), allowing for dynamic volume resizing. Performing consistent backups by taking snapshots of the logical volumes.
Should I use LVM with BTRFS?
To me LVM is indeed better for managing space with whatever filesystems on top of it, but BTRFS should be used for features specific to it – mainly snapshots. In simple home network use it is probably better to stay away from it.
What is the full form of LVM?
Logical volume management (LVM) is a form of storage virtualization that offers system administrators a more flexible approach to managing disk storage space than traditional partitioning.
What is LVM short for?
LVM (Logical Volume Manager)
How are physical volumes partitioned in the LVM?
When PVs are under the control of LVM they can be grouped into Volume Groups (VGs). Physical Volumes are divided into Physical Extents (PEs) and the partition size for all Physical Volumes in the same Volume Group is identical. Physical Extent size is 4MB.
What’s the size of an extent in LVM?
(An “extent” is the basis unit of disk space that LVM’s tools work with. On my machines the extent size is 32MB. You can make filesystems any size you want, but volumes (read: “partitions”) will be sized in whole numbers of extents, rounding up automatically.)
What’s the difference between a partition and physical volume?
A “physical extent” is just a consecutive chunk of 4MB (by default) on an LVM physical volume. It’s an LVM concept, not a disk concept.
Can a physical volume be removed from a volume group?
As the physical volume is not part of any volume group, it can also be removed as physical volume. Doing so will not list the disks /dev/vdb1 and /dev/vdc1 as part of any volume group or as physical volume. The disks can now be removed or used for something else, as they are not part of the lvm configuration any longer.