linuxexpert-practice-labs/labs/rhcsa/5-2-lvm

RHCSA 5.2: LVM physical volumes, volume groups and logical volumes

A volume group with a chosen extent size, a logical volume sized in extents, growing a volume group, and taking LVM apart 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.

• /dev/loop40 has two empty partitions: /dev/loop40p1 (600 MiB) and /dev/loop40p2 (300 MiB). Tasks 1 and 2 use them.
• /dev/loop41 has two partitions that are physical volumes of a volume group vgold, with logical volumes lvone and lvtwo, as tasks 1 and 2 leave vgdata. Task 3 takes it apart, so the first two tasks' results can stay.

Tasks

1. Create a volume group vgdata with 8 MiB extents on /dev/loop40p1, and a logical volume lvdata of exactly 50 extents.
2. Add /dev/loop40p2 to vgdata, and create a logical volume lvrest that uses all the space left.
3. Remove lvone, lvtwo, the volume group vgold and both its physical volumes (/dev/loop41p1 and /dev/loop41p2) cleanly.

Hints

• pvcreate, vgcreate -s 8M, lvcreate -l 50 -n; vgdisplay, lvdisplay (Current LE, LV Size).
• vgextend, lvcreate -l 100%FREE; vgs vgdata shows #PV and VFree.
• lvremove, vgremove, pvremove; pvs, vgs, lvs, lsblk -f.