https://drive.google.com/file/d/1wXqeejKAGJc6YvKdJ81TAUQgTyTtxmSD/view?usp=sharing

1. Understanding LVM Metadata Backup

How LVM Auto-Backups Work

• LVM automatically saves metadata in /etc/lvm/archive/ after every change (e.g., lvcreate, vgremove).
• Files are named: VG_NAME_XXXXX.vg (e.g., Linux_VG_00001-123456789.vg).
• Use vgcfgrestore to revert to a previous state.

⚠️ Critical:

This only works if:

• The physical volume (PV) still exists (disk/partition intact)
• You haven’t overwritten the PV with new data

2. Lab Setup: Create and Delete LVM

Create LVM

# Add 5GB disk (e.g., /dev/sdb)
sudo fdisk /dev/sdb
# Create partition: n → p → 1 → [Enter] → [Enter] → t → 8e → w
sudo partprobe

# Create LVM
sudo pvcreate /dev/sdb1
sudo vgcreate Linux_VG /dev/sdb1
sudo lvcreate -L 3G -n Linux_LV Linux_VG
sudo mkfs.ext4 /dev/Linux_VG/Linux_LV    # Fixed path!

# Mount and add data
sudo mkdir /data
sudo mount /dev/Linux_VG/Linux_LV /data
cd /data
touch test{1..5}
sudo umount /data

💡 Note: Your original command had reversed paths—correct is:

/dev/Linux_VG/Linux_LV (not /dev/Linux_LV/Linux_VG)

Delete LVM (Accidentally)

sudo lvremove /dev/Linux_VG/Linux_LV
sudo lvs    # LV gone!

3. Restore Deleted LVM

Step 1: Locate Backup Metadata

cd /etc/lvm/archive
ls -ltrh    # Find latest Linux_VG_*.vg file
# Example: Linux_VG_00002-123456789.vg

Step 2: Test Restore (Dry Run)