Working with Essential Red Hat Linux System Administration Tools

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Working with Essential Red Hat Linux System Administration Tools - Storage (VDO)

This lab will present us with a scenario that will make sure we have the minimum knowledge required for successfully passing the RHCE on RHEL8. In this particular lab, we'll be looking at Red Hat storage methods, and making sure we've got skills at the level expected of someone taking this exam. *This course is not approved or sponsored by Red Hat.*

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Lab Info

Level

Intermediate

Last updated

Sep 12, 2025

Duration

15m

Challenge

Create the Underlying Device

To set up VDO we first need to install the software.

yum install /home/cloud_user/kmod-kvdo-6.1.3.23-5.el7.x86_64.rpm -y

Once that's done, we need to create a Logical Volume containing the two physical disks, since vdo can't span disks.

pvcreate /dev/nvme1n1 /dev/nvme2n1

vgcreate vdoDev /dev/nvme1n1 /dev/nvme2n1

lvcreate -n vdoLV -l 100%FREE vdoDev

Now that's done we have a 40G device we can work with.

vdo create --name=RHCE --device=/dev/vdoDev/vdoLV --vdoLogicalSize=150G --sparseIndex=enabled

to create the VDO device.
Challenge

Create a File System on the Device

Super Simple:

mkfs.xfs /dev/mapper/RHCE
Challenge

Mount the Device
First we make sure the mount point exists:
```
mkdir /mnt/video
```
Then we can run
```
mount /dev/mapper/RHCE /mnt/video
```
And we're done!

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