Resizing volumes in RHEL

1. Ensure disk is already expanded from hypervisor
2. Check the list of disks attached lsblk
3. Check if the disk expansion was recognised by RHEL
   fdisk /dev/sda
   Press p to check properties
   Press q to quit fdisk
4. Delete the partition for the disk
   fdisk /dev/sda
   Press d and select the partition number (e.g 3)
   Press n to re-create partition
   Press t to select type. 8e is for local LVM filesystem
   Press w to write the changes
5. Reprobe the disks modprobe -s
6. Resize the PV pvresize /dev/sda
7. Verify the disk is re-sized vgdisplay
8. Verify the lv lvdisplay and confirm the LV that we want to expand
9. Extend LV lvextend -l +100%FREE /dev/rhel_bastion/root
10. Verify the LV size was extended lvdisplay
11. Extend the filesystem to recognise the new disk size.
    For xfs filesystem: xfs_growfs /dev/rhel_bastion/root
    For other filesystem: resize2fs /dev/rhel_bastion/root

Updated Steps

1. Check list of disks attached lsblk
2. Recreate root partition
   fdisk /dev/sda
   Press p to check properties
   Press d → 2 to delete partition 2
   Press n → 2 → Enter → Default Value → n to create new partition
   Press w to save the configuration
3. Run partprobe -s to sync the partition configuration
4. Verify the volume group vgdisplay
5. Expand the root partition
   lvextend -l +100%FREE /dev/mapper/rhel-root
6. Expand the file system
   xfs_growfs /dev/mapper/rhel-root