RHCSA Practical Lab Series – Resizing Logical Volumes
🔍 Lab 18: Adjusting Logical Volume Size in RHEL 9
📌 Objective
In this lab, you will:
✔ Resize an existing logical volume (LV) named vo
✔ Expand the LV to 239 MB
✔ Resize the filesystem to match the new volume size
✔ Verify that the new size is applied correctly
📌 Step 1: Scan for Available Logical Volumes
🔹 List all existing volume groups and logical volumes:
[root@node2 ~]# lvscan
📌 Expected Output (Example):
ACTIVE '/dev/myvol/vo' [213.00 MiB] inherit
✅ Ensure that /dev/myvol/vo is active before resizing.
📌 Step 2: Extend the Logical Volume
🔹 Increase the LV size to 239 MB:
[root@node2 ~]# lvextend -L 239M /dev/myvol/vo
📌 Explanation:
lvextend→ Command to increase LV size.-L 239M→ Sets the size to exactly 239 MB./dev/myvol/vo→ The logical volume being resized.
✅ If successful, you will see:
Size of logical volume myvol/vo changed from 213.00 MiB to 239.00 MiB.
Logical volume myvol/vo successfully resized.
📌 Step 3: Verify the Updated Logical Volume Size
🔹 Check the new size of the LV:
[root@node2 ~]# blkid /dev/myvol/vo
✅ The output should reflect the new size.
📌 Step 4: Resize the Filesystem
🔹 Adjust the filesystem to match the new LV size:
[root@node2 ~]# resize2fs /dev/myvol/vo
📌 Explanation:
resize2fs→ Resizes the filesystem on an ext4/xfs partition./dev/myvol/vo→ The logical volume being modified.
✅ Expected Output:
Filesystem at /dev/myvol/vo is now 239M blocks long.
📌 Step 5: Verify the Updated Filesystem Size
🔹 Check available disk space:
[root@node2 ~]# df -h
📌 Expected Output:
Filesystem Size Used Avail Use% Mounted on
/dev/myvol/vo 239M 100M 139M 43% /mnt/data
✅ If the size matches 239M, the resizing was successful!
📌 Troubleshooting Tips
🔹 If resize2fs fails, check the filesystem type:
[root@node2 ~]# df -T /dev/myvol/vo
- If it is ext4, continue using
resize2fs.
If it is XFS, use:
xfs_growfs /dev/myvol/vo
🔹 If lvextend fails due to insufficient space, check free space in the volume group:
[root@node2 ~]# vgdisplay myvol | grep Free
✅ Ensure there is enough free space before extending the LV.
✅ Final Summary
✔ Scanned available logical volumes
✔ Increased the LV size to 239 MB
✔ Resized the filesystem to match
✔ Verified the new size using df -h
📌 Next Lab: Configuring a Swap Partition in RHEL 9
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