Linux LVM Part 4 - Recovering from disk failure
Learn how to build and recover a Linux LVM RAID5 array from scratch — including disk failure simulation, hot-swap replacement, and live data migration using pvmove.
In this step-by-step walkthrough, we start with five clean disks and create a Volume Group with an LVM RAID5 and an LVM RAID10 Logical Volume. We then create a filesystem, mount it, and copy real data to simulate production usage. Next, we deliberately remove a disk to demonstrate how LVM handles failure, inspect the system state using pvs, vgs, and lvs, and test data accessibility.
We then insert a replacement disk and recover the RAID5 array, validating that the data remains intact. Finally, we demonstrate using the RAID10 volume a safer proactive approach using pvmove to migrate data off a failing disk before it dies — a critical technique for production Linux systems.
Topics covered:• Creating LVM RAID5 from multiple disks• Volume Groups, Physical Volumes, Logical Volumes explained• Creating and mounting filesystems on LVM RAID• Simulating disk failure in LVM RAID5• Using pvs, vgs and lvs to diagnose problems• Replacing failed disks in LVM• Recovering degraded RAID5 volumes• Using pvmove to migrate data from failing disks• Validating RAID recovery and data integrity• Best practices for Linux storage resilience
This video is ideal for:Linux administrators, homelab users, Proxmox users, DevOps engineers, and anyone learning advanced LVM storage management.
Commands demonstrated:LVM RAID5 creation, vgcreate, lvcreate, mkfs, mount, pvs, vgs, lvs, pvmove, vgreduce, pvcreate, lvconvert, and recovery workflows.
If you're building resilient Linux storage or learning LVM RAID, this guide walks through both failure recovery and preventative maintenance techniques.
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