The D-Link 4-Bay Network Storage Enclosure (DNS-343) is the perfect way to store, share, and safeguard your documents, music, videos, and photos. With the D-Link tool-less installation, you can easily insert up to 4 SATA drives1 without any tools or attaching any cables. Plus, the DNS-343 is a scalable solution, allowing you to start off with one SATA hard disk drive (HDD) and add up to 3 more as you grow. By supporting RAID 0, 1, 5, and JBOD, the DNS-343 gives you a variety of data protection options to help avoid data loss due to hard drive failure. RAID 0 combines all drives in a striped configuration, splitting data evenly across the hard drives to provide the highest performance. RAID 1 causes two drives to mirror each other, providing maximum protection. If there are four drives present, you can set up two separate RAID 1 partitions. If one drive fails, the unaffected drive in the partition will continue to operate normally. Once you replace the failed drive, RAID 1 mirroring will resume and both drives will mirror each other again. Advanced RAID 5 offers the highest performance with the most reliable data recovery in the case of a drive failure. RAID 5 technology uses a clever algorithm to distribute your data over 4 SATA hard disk drives and, in the case of a hard drive failure, the DNS-343 will continue to function with your data intact.