Exam EX200 Topic 5 Question 1 Discussion

lvextend -rL 290M /dev/vg/lv
or
lvreduce -rL 290M /dev/vg/lv

1
Check the current LV and filesystem status: First, determine the current size of the logical volume (LV) and the filesystem.
lsblk
df -h
lvdisplay
This will show you the current sizes of the LV and its corresponding filesystem.
2
Ensure that the filesystem is unmounted (if necessary): In case the filesystem is mounted, it’s a good practice to unmount it before resizing.
umount /dev/mapper/your-vg-your-lv
Replace your-vg-your-lv with your actual volume group and logical volume name.
Resize the filesystem: The first step is to resize the filesystem itself. We'll use resize2fs for ext4 or xfs_growfs for XFS. Here, assuming ext4 filesystem (you can skip this if it's already resized or if it's XFS).
3
For ext4:
resize2fs /dev/mapper/your-vg-your-lv 290M
For XFS (Note: XFS cannot shrink, so this step is mostly used when growing the filesystem):
xfs_growfs /dev/mapper/your-vg-your-lv
4
Resize the logical volume: After the filesystem is resized, the next step is to resize the logical volume (LV) to the desired size of 290 MB.
lvresize -L 290M /dev/your-vg/your-lv
This will shrink or extend the logical volume to 290 MB.
Resize the filesystem again (if needed): If you are shrinking the logical volume, you might need to shrink the filesystem before shrinking the LV. For resizing the filesystem down, follow these steps:
For ext4:
e2fsck -f /dev/your-vg/your-lv
resize2fs /dev/your-vg/your-lv 290M
For XFS: XFS cannot shrink, so if you are using XFS, you will need to back up data, recreate the partition, and restore it.
5
Mount the filesystem again: Once the resizing is done, remount the filesystem to make it usable again.
mount /dev/mapper/your-vg-your-lv /your-mount-point
Verify the changes: Finally, verify that the logical volume and filesystem are correctly resized and the data is intact.
lsblk
df -h
lvdisplay