Organizations are enhancing their tape backup strategies with new disk-based options. By tapping the capabilities of disk, such as concurrent read/write and random access, enterprises can complement their tape backup strategies to achieve faster and more reliable backup and recovery while continuing to use tape for what it does best. This paper provides an overview of how disk-based data protection can integrate and complement existing technologies, for bottom-line benefits. A comparison of backup-to-disk and tape library emulation is included, as well as guidelines on what to consider in disk-base backup solutions.