A Complete Guide on Linux LVM

Discover how physical volumes form a volume group and map logical extents to physical extents to create linear logical volumes across disks. Then allocate a file system on the LV.

Create a volume group from physical volumes using pvdisplay and vgcreate to form a disk space pool for logical volumes and filesystems, organized by fixed-size extents.

Create and manage logical volumes within a volume group using two disks, allocate space from one or both disks, and understand extents and naming conventions.

Learn to create logical volumes by specifying extents, allocating 50 extents from each of two disks, and using ranges such as 101 to 125 or 200 onwards.

Learn how striped logical volumes in Linux LVM distribute data across multiple physical volumes, improving I/O and throughput, with stripe size settings and comparisons to linear volumes.

Create a logical volume from multiple physical volumes in a volume group, specifying size and block size, and verify with lv display.

Learn physical volume administration in Linux LVM by using pvcreate, pvscan, pvdisplay, pvs, pvresize, and pvremove to create, inspect, resize, and remove physical volumes.

Master volume group administration by creating a volume group from physical volumes, setting extent size, and configuring maximum physical and logical volumes.

Learn how to split a volume group by moving a disk from the original group to a new volume group, while preserving logical volumes’ associations and verifying with lv commands.

Learn how to combine volume groups in Linux LVM by merging an inactive group into another, then activate and verify the merged logical volumes.

Learn how Linux LVM stores volume group metadata by automatically creating a backup file and an archives directory. It covers viewing backups, manually backing up, and renaming a volume group.

Learn how to migrate a Linux LVM volume group from one system to another using lvm commands, including making disks visible, exporting and importing, and scanning for activation.

Learn how to migrate a Linux LVM volume group from one system to another using vgexport and vgimport, exporting and importing disks and logical volumes, then mounting them.

Learn how lvm mirroring creates mirrored logical volumes across two physical disks to provide redundancy, specifying copy numbers with -m, and understanding space overhead compared to linear volumes.

Learn how thin provisioning lets logical volumes exceed the available space in a volume group, using a pool of physical volumes. Monitor the pool and add capacity when needed.

Set up a Linux LVM thin provisioning environment by creating a volume group from two disks, building a thin pool, allocating, formatting, and mounting multiple logical volumes.

Observe how to format and mount three logical volumes within a volume group, then monitor storage usage and demonstrate that space is allocated based on actual usage.

Learn how a snapshot creates an exact copy of a file system at a point in time to back up data, reducing downtime and enabling space-efficient backups on lvm.

Create a logical volume named data, format and mount it, then create a 200 mb snapshot to study copy-on-write and how to merge it back to restore data.

Explore how LVM snapshots capture a file system state, how post-snapshot changes are not restored, and how using more space than the snapshot can corrupt it.

Learn to recover metadata in linux lvm from a faulty physical disk by inspecting headers and the physical volume, understand how metadata affects the volume group, and preview recovery steps.

Explore physical volume attributes in Linux LVM: see how a disk becomes part of a volume group, its allocation status, export and import effects, and top allocation behavior.

Concludes the Linux LVM course module by inviting feedback, answering questions in the Q&A forum, and requesting reviews to grow future lectures and content.