linuxexpert-practice-labs/labs/rhcsa/5-4-adding-storage-and-swap

RHCSA 5.4: Adding storage and swap without data loss

A swap partition in the free space of a disk that holds data, swap on a new logical volume, and removing swap cleanly.

Before you start

The lab adds two 1 GiB spare disks. They're image files under /var/lib/le-lab/disks/, attached again at every boot, before file systems and swap are activated.

• /dev/loop40 has a GPT table with one 300 MiB partition, /dev/loop40p1, holding an ext4 file system with data. The rest of the disk is free.
• /dev/loop41 is a physical volume of the volume group vglab, with a logical volume lvdata and a 128 MiB swap logical volume oldswap, active and in /etc/fstab, as task 2 leaves a swap LV. Task 3 removes it, so task 2's result can stay.

Tasks

1. On /dev/loop40, add a 512 MiB swap partition in the free space and make it active at every boot. The first partition and its data must stay unchanged.
2. Add a 256 MiB swap space on a new logical volume in vglab, active at every boot.
3. Remove the swap LV oldswap cleanly: not active, the LV gone, no fstab line naming it, and no Timed out waiting for device error at the next boot.

Hints

• fdisk or parted: a new partition after the first; type Linux swap. mkswap, a line UUID=... none swap defaults 0 0, swapon -a, swapon --show.
• lvcreate -L 256M -n, mkswap, a line in /etc/fstab.
• swapoff, then remove its line from /etc/fstab, systemctl daemon-reload, then lvremove. journalctl -b -p err after a reboot.