Which tool can be used alongside VDO to ensure data integrity?

Using VDO (Virtual Data Optimizer) in conjunction with other tools for data integrity is a strategic choice. Each of the mentioned tools plays a role in enhancing data integrity in different ways.

RAID (Redundant Array of Independent Disks) provides redundancy and improves fault tolerance through various configurations that spread data across multiple disks. This means that even if one disk fails, the data can still be recovered from another, ensuring data integrity.

LVM (Logical Volume Manager) allows for management of disk drives and storage arrays. It provides features like snapshotting, which can be useful for creating point-in-time copies of data, contributing to data protection and recovery processes.

MDADM (Multiple Device Admin) is a tool used for managing software RAID arrays in Linux. It offers functionalities to create and manage RAID devices, similar to hardware RAID but at the software level, leading to improved data redundancy and integrity.

By integrating VDO with any of these tools, you significantly bolster data integrity through redundancy and various management capabilities. Therefore, the option indicating that all of these tools can be used alongside VDO to maintain data integrity is the correct answer, as they complement each other to create a resilient storage solution.