01PE076 Lenovo ThinkSystem 2.5in PM1645 800GB Mainstream SAS 12Gb HS SSD

Spare number 01PE076 matches option 4XB7A13653 (feature code B4A0), the ThinkSystem 2.5-inch PM1645 800GB Mainstream SAS 12Gb hot-swap SSD. One drive arrives in a hot-swap tray with a documentation flyer. Samsung NAND flash is used, and the mainstream class covers mixed read-write workloads.

Connectivity is dual-port 12 Gbps SAS in an active-active arrangement; unlike SATA, SAS permits full duplex transfers. Power-loss protection follows Samsung's own architecture, and S.M.A.R.T. reporting and end-to-end data protection are both present. Sixteen initiators work with tagged command queuing to a depth of 128 commands. Compliance covers SAS-3, SPL-3, SBC-4, SPC-4 and SAM-5.

At 800 GB the endurance rating is 3 DWPD for 5 years, equal to 4,380 TB written. Measured with 4 KB blocks, this capacity delivers 230,000 read IOPS and 70,000 write IOPS. With 128 KB blocks both sequential read and write sit at 1000 MBps. Random-access response takes 106 µs on a read and 60 µs on a write. MTBF is 2,000,000 hours, UBER is under 1 in 10^17 bits read and typical power is 9 W for read or write. When not operating, the drive tolerates 1,500 G shock at 0.5 ms and 20 G RMS vibration across 10 to 2000 Hz.

Family numbering: 2.5-inch PM1645 options 4XB7A13654 (B4A1) and 4XB7A13655 (B4A2) hold 1.6TB and 3.2TB, and the 3.5-inch set runs 4XB7A13657 (B4A3), 4XB7A13658 (B4A4) and 4XB7A13659 (B4A5) at 800GB, 1.6TB and 3.2TB.