Recs.
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For standard rack-based systems this unit offers good performance and versatility. It has a 1U rack form factor so it can fit into most standard rack enclosures. The RS815+ holds a total of four hard disks and can be expanded with four more more via an expansion unit. With the RS815+, you can transcode multiple streams of full HD video, run up to 40 IP surveillance cameras simultaneously or provide no-lag file transfer to large workgroups.
SpecsUpdate
Pros
Pro Encrypts data with little impact to performance
This unit utilizes the new AES-NI encryption engine, which is much faster and more efficient than the standard AES-256 used by most NAS units. This means you can work more with encrypted data without suffering performance drops from a heavy CPU load.
Pro Good computational power for virtually all use cases
Great computational power allows this unit to be usable within pretty much any environment. It can handle multiple-stream transcoding, large scale file handling, or multiple stream surveillance data storage. Whatever the use case, this unit will most likely have you covered.