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Lenovo lists 4XB7A10248 (feature code B499) as the ThinkSystem 2.5-inch Intel S4510 480GB Entry SATA 6Gb Hot Swap SSD. The S4510 family uses 64-layer Intel 3D NAND TLC flash behind a 6Gbps SATA interface, and the drive comes with a hot-swap tray. It has no SED encryption.
At 480GB Lenovo rates endurance at 1.4 drive writes per day, which is 1.2 PB written, with an MTBF of 2,000,000 hours.
Lenovo's figures for this capacity are 95,000 random read IOPS and 18,000 random write IOPS at 4 KB, with sequential reads of 560 MBps and sequential writes of 490 MBps at 128 KB. Sequential latency is 36 microseconds for reads and 37 for writes, and random latency is 103 and 73 microseconds. Typical active-write power is 3.0 W.
The 2.5-inch S4510 range also has 4XB7A10247 (240GB, B498), 4XB7A10249 (960GB, B49A), 4XB7A13622 (1.92TB, B49B), 4XB7A13623 (3.84TB, B49C) and 4XB7A13624 (7.68TB, B96X).
Other SATA SSDs are listed in the Lenovo SSD category; one of them is the Lenovo ThinkSystem 2.5-inch 5300 480GB mainstream SATA 6Gb hot swap SSD.
| Option part number | 4XB7A10248 |
| Feature code | B499 |
| Capacity | 480GB |
| Interface | 6 Gbps SATA |
| Form factor | 2.5-inch hot-swap |
| Class | Entry |
| Endurance | 1.4 DWPD (1.2 PB written) |
| 4 KB random IOPS | 95,000 read / 18,000 write |
| 128 KB sequential | 560 MBps read / 490 MBps write |
| NAND | 64-layer Intel 3D TLC |
| Typical power | 3.0 W (active write) |