This is an archive version of the document. To get the most up-to-date information, see the current version.

Managing CBT Driver

To increase the speed and efficiency of incremental backups of managed servers, you might need to install the CBT driver. The driver is installed on every server machine protected with Veeam backup agent.

The CBT driver keeps track of data blocks that changed since the latest backup session. Information about changed data blocks is registered, and when a backup job runs, Veeam backup agent uses this information to find out what data blocks have changed since the last run of the job, and then copies only changed data blocks from the disk.

Prerequisites

You can install the CBT driver on managed computers that meet all of the following requirements:

Computers must run 64-bit Microsoft Windows 10 version 1803 or later.
Computers must have Veeam backup agent 5.0 or later installed.
Veeam backup agent must be configured to run in the Server operation mode. For details, see section Selecting Product Edition of the Veeam Agent for Microsoft Windows User Guide.

Important!

Consider the following:

Prior to installing the Veeam CBT driver on a computer running Microsoft Windows Server 2008 R2, make sure that update KB3033929 is installed in the OS. For details, see this Microsoft webpage.
Do not install the Veeam CBT driver on a computer running Microsoft Windows Server 2008 R2, 2012 or 2012 R2 if one or more volumes on this computer are encrypted with Microsoft BitLocker (or other encryption tool), or if you plan to use Microsoft BitLocker to encrypt volumes on this computer. Concurrent operation of Microsoft BitLocker and Veeam CBT driver may result in driver failures and may prevent the OS from starting.

Required Privileges

To perform this task, a user must have one of the following roles assigned: Portal Administrator, Site Administrator, Portal Operator.

Installing CBT Driver

To install the CBT driver for one or more Veeam backup agents:

For details, see Accessing Veeam Service Provider Console.

In the menu on the left, click Discovery.
Open the Backup Agents tab.
Click Filter. In the Operation mode section, select the Server check box only. Click Apply.

The list of discovered computers will display Veeam backup agents running in the Server operation mode.

Select one or more Veeam backup agents in the list.
At the top of the list, click Backup Agent and choose Install CBT Driver.

Alternatively, you can right-click the necessary Veeam backup agent, choose Backup Agent and select Install CBT Driver.

Check the value in the CBT Driver column.

When installation completes, it must display Installed (Reboot required) status.

Reboot computers on which you installed the CBT driver.

You can reboot the remote computer in Veeam Service Provider Console, as described in Rebooting Remote Computers.

Uninstalling CBT Driver

To uninstall the CBT driver from one or more Veeam backup agents:

For details, see Accessing Veeam Service Provider Console.

In the menu on the left, click Discovery.
Open the Backup Agents tab.
Click Filter. In the Operation mode section, select the Server check box only. Click Apply.

The list of discovered computers will display Veeam backup agents running in the Server operation mode.

Select one or more Veeam backup agents in the list.
At the top of the list, click Backup Agent and choose Uninstall CBT Driver.

Alternatively, you can right-click the necessary Veeam backup agent, choose Backup Agent and select Uninstall CBT Driver.

Reboot computers on which you uninstalled the CBT driver.

You can reboot the remote computer in Veeam Service Provider Console, as described in Rebooting Remote Computers.