The QNAP TS-412U Turbo NAS is a 4-drive 1 U rack-mounted network attached storage (NAS) server optimized for small and medium business who are looking an affordable yet high performance network storage solution. The TS-412U is easily installed in the server room and configured for up to 12 TB of online storage. The TS-412U is an ideal solution for centralized data backup, cross-platform file sharing, website hosting, and much more. Moreover, the TS-412U offers exceptionally low power consumption, maximum system reliability and expandability, and numerous business-critical applications.The TS-412U works with 2.5-inch or 3.5-inch SATA hard drives mounted in hot-swappable drive carriers and includes two Gigabit LAN ports for multi-IP settings and port trunking (7 bonding modes). The TS-412U is also is equipped with 4 USB ports and 2 eSATA ports for storage expansion or external data backup.The TS-412U supports RAID 0, 1, 5, 6, 10, 5+ hot spare, single and JBOD disk configurations. The unique online RAID capacity expansion and online RAID level migration allow the users to expand the storage capacity of the RAID configuration and upgrade the RAID level without turning off the server respectively. The RAID recovery feature secures the server data against accidental removal of the hard drives.In addition, the TS-412U supports NAS and iSCSI applications to provide a low-cost, highly flexible and efficient IP SAN solution for SMB users. iSCSI targets can be created on the NAS for storage expansion of the PC or other servers and backup destination of the database servers and mail servers, etc. The TS-412U can be used to connect to other iSCSI devices on the network and add them as virtual disk drives (VDD) to expand the storage capacity of the NAS.