4XB7A13658 — Lenovo 4XB7A13658 internal solid state drive 1.6 TB 3.5" SAS 3D NAND

4XB7A13658: Lenovo 4XB7A13658 internal solid state drive 1.6 TB 3.5" SAS 3D NAND.

ThinkSystem PM1645 Mainstream SAS 12Gb SSDs The ThinkSystem PM1645 Mainstream SAS 12Gb solid-state drives (SSDs) in capacities of up to 3.2 TBare next-generation high-performance SSDs suitable for a wide range of applications of running onThinkSystem servers. The PM1645 Mainstream SAS 12Gb SSD is shown in the following figure. Entry SSDs and Mainstream SSDs have similar read and write IOPS performance, but the key differencebetween them is their endurance (or lifetime) (that is, how long they can perform write operations becauseSSDs have a finite number of program/erase (P/E) cycles).

Mainstream SSDs have better endurance butlower cost/IOPS ratio compared to Entry SSDs. SSD write endurance is typically measured by the numberof program/erase (P/E) cycles that the drive incurs over its lifetime, listed as the total bytes of written data(TBW) in the device specification. The TBW value assigned to a solid-state device is the total bytes of written data (based on the