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The CAB-SAS30M-8644 is a QNAP Mini-SAS HD cable using the SFF-8644 connector standard, designed for 12Gbps SAS connectivity between QNAP NAS units and compatible SAS expansion enclosures. Where a direct-attach SAS link is required to extend raw storage capacity — connecting a JBOD or expansion chassis to a host NAS — this cable provides the physical layer that keeps the link at full 12G SAS bandwidth rather than bottlenecking at SATA-tier speeds.
The SFF-8644 form factor targets QNAP NAS systems and expansion enclosures equipped with Mini-SAS HD (SFF-8644) host bus adapter ports. Compatible QNAP product families include SAS-capable TVS-series and ES-series NAS units with onboard or add-in SAS HBA interfaces, as well as QNAP JBOD and JBOF expansion enclosures (such as the JBOD-800S and JBOF-100C-U families) that expose SFF-8644 ports for host attachment. Verify that both the host NAS and the target expansion unit list SFF-8644 as their SAS interface before ordering — SFF-8088 (external Mini-SAS, 6G) and SFF-8087 (internal, 6G) connectors are physically incompatible with this cable.
Seat the SFF-8644 connectors fully until the latch clicks on both ends before powering the link. SAS cables carry data only — confirm the expansion enclosure has its own independent power supply connected before bringing the host online. Route cable away from sharp chassis edges; SFF-8644 connectors are keyed and polarized, so forced insertion indicates a mismatch rather than incorrect orientation.
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