Intel S4600 Enterprise Mainstream G3HS, Solid state drive, encrypted, 240 GB, hot-swap, 2.5", SATA 6Gb/s, 256-bit AES, for Flex System x240 M5 (2.5"); System x3250 M6 (2.5"); x3650 M5 (2.5"); x3850 X6; x3950 X6. The 2.5-inch Intel S4600 Mainstream SATA solid-state drives (SSDs) for Lenovo servers are advanced data center SSDs optimized for mixed read-write performance, endurance and strong data protection.