The SAS HBA PCIe Expansion Card is designed for expanding the capacity of a QNAP NAS by connecting it to TL SAS JBOD storage enclosures and REXP expansion units. Multiple expansion units can be daisy-chained via high-speed mini SAS HD cables to expand the total disk capacity up to 4.6PB to meet growing data storage needs. SAS-based storage solutions can assist businesses in creating highly-reliable IT environments for virtualization, surveillance, Big Data, video editing and TV broadcast storage. Specification Standard Warranty 3 years Controller Broadcom SAS3616W Tri-mode Connector Four (x4) SFF-8644 PCIe and Lanes PCIe Gen 3 x16 Tri-mode 12Gb/s SAS, 6Gb/s SATA, and PCIe (NVMe)* up to 8.0 GT/s A wide port with four SAS signals. Bracket Low-profile (default). Desktop and Full-height brackets are also included. Supported Cable CAB-SAS05M-8644, CAB-SAS10M-8644, CAB-SAS20M-8644, CAB-SAS30M-8644 Supported Cable_note Only passive cables are supported. Passive cables are sold separatedly.