03GX674 Lenovo ThinkSystem 3.5in PM1653 1.92TB Read Intensive SAS 24Gb HS SED SSD

Option 4XB7A80325 (feature code BNWG) is the number that spare 03GX674 corresponds to. It is the 1.92 TB 3.5-inch version of the Samsung PM1653 Read Intensive SAS drive and sits in a hot-swap tray. Samsung's sixth-generation 128-layer V-NAND TLC flash stores the data, and the host link is 24 Gbps SAS. Samsung model code MZILG1T9HCJR-V7 applies.

Self-encryption follows the TCG Enterprise standard. The rated endurance is 1 DWPD for 5 years, equal to 3,504 TB written, with a data reliability figure below 1 in 10^17 bits read and an MTBF of 2,000,000 hours. Electrical draw averages 11.5 W on reads and 14.7 W on writes. Out of service, the drive tolerates a 1,500 G shock lasting 0.5 ms and 20 GRMS of vibration between 20 and 2000 Hz.

On a 24 Gbps link, 4 KB random work reaches 420,000 read IOPS and 95,000 write IOPS; 128 KB sequential speeds are 2100 MB/s reading and 2000 MB/s writing; random latency is 120 µs read and 45 µs write. Run at 12 Gbps, the same drive records 240,000 read IOPS, 80,000 write IOPS and 1100 MB/s in both directions. The drive, backplane and SAS controller must each support 24 Gbps for that speed.

The firmware handles 16 initiators and tagged command queuing to a depth of 128 commands, follows SAS-3, SPL-3, SBC-4, SPC-4 and SAM-5, and includes S.M.A.R.T., end-to-end data protection and a power-loss protection design from Samsung. Other 3.5-inch PM1653 hot-swap options: 4XB7A80324 (960GB), 4XB7A80326 (3.84TB), 4XB7A80327 (7.68TB) and 4XB7A80328 (15.36TB).