Cisco DC SN640 6.40 TB Solid State Drive - 2.5" Internal - U.2 (SFF-8639) NVMeOverview: The Cisco DC SN640 6. 40 TB Solid State Drive is a purpose built, high capacity NVMe storage solution designed for demanding data centers and enterprise environments. Engineered for reliability, endurance, and steady, low latency performance, this 2. 5" internal drive fits seamlessly into servers and storage arrays that rely on fast, consistent access to data. With a generous 6. 40 TB capacity and a compact U. 2 (SFF 8639) form factor, the