Configuring a Disk Schedule Using Udev Rules

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Configuring a Disk Schedule Using Udev Rules

In this hands-on lab, you will use `udev` rules to manage and configure the disk scheduler for a disk attached to the lab system. As part of the workflow, you will identify the disk, check the default scheduler configuration, and collect the unique identifier of each disk. With this information, you will create a `udev` rule to set the disk schedule and confirm it is successfully updated. *This course is not approved or sponsored by Red Hat.*

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Lab Info

Level

Intermediate

Last updated

Sep 14, 2025

Duration

15m

Challenge

Validate Any Local Storage Devices
1. Identify any secondary storage devices on the system, looking for nvme1n1.
2. Collect the UUID value for that storage device.
3. Add the storage device to /etc/fstab using the UUID value.
  
  The primary mount point should be /mnt/data.
4. Check the default scheduler for the identified storage device.
Challenge

Create a udev Rule to Update the Disk Scheduler
1. Use udevadm to collect the unique identifier ID_SERIAL_SHORT for the storage device.
2. Create the udev rule file, called 99-scheduler.rules.
3. Update the rule file using the ID_SERIAL_SHORT value.
4. Reload the udev rules and apply the udev rules.
Challenge

Validate the Changes to the System
1. Reboot the system.
2. Confirm the updated disk schedule value is still place.

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