The silver 1TB Fusion R400S RAID Drive Module from Sonnet is designed to work with Sonnet's Fusion R400S storage system. The drive module offers a storage capacity of 1TB. It is hot-swappable and helps perform incremental backup and swap out large amounts of data. The Fusion drive module features RAID Edition hard drive, which is subjected to hours of additional, stringent testing to check for soft errors, vibration and other reliability predictors. Furthermore, the RAID drive offers high mean time between failures (MTBF) and is the building block of a super-reliable Fusion storage system.