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ThinkSystem PM1645 Mainstream SAS 12Gb SSDsThe 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 number ofP/E cycles) that a drive can be guaranteed to complete (% of remaining P/E cycles = % of remainingTBW). Reaching this limit does not cause the drive to immediately fail. It simply denotes the maximumnumber of writes that can be guaranteed. A solid-state device will not fail upon reaching the specifiedTBW. At some point based on manufacturing variance margin, after surpassing the TBW value, the drivewill reach the end-of-life point, at which the drive will go into a read-only mode.For example, the 1.6TB PM1645 SSD has an endurance of 8,760 TB of total bytes written (TBW). Thismeans that for full operation over five years, write workload must be limited to no more than 4,800 GB ofwrites per day, which is equivalent to 3.0 full drive writes per day (DWPD). For the device to last threeyears, the drive write workload must be limited to no more than 8,000 GB of writes per day, which isequivalent to 5.0 full drive writes per day.

M.2 is a solid-state drive (SSD) form factor primarily used as an operating system boot solution however depending on the endurance of the M.2 drives, they may also be suitable for read-intensive or mixed workloads.Lenovo ThinkSystem servers support M.2 drives in one of three ways, depending on the server selected:- One or two drives, mounted in an M.2 adapter, vertically in a dedicated slot- Two or four drives, mounted horizontally in an M.2 adapter- Installed directly on the system boardOne example is the Dual M.2 Adapter, as shown in the following figure, with one 128GB M.2 drive partially inserted. The second M.2 drive is installed on the other side of the adapter.

The Lenovo internal drives to extend your systems with big capacity and good compatibility. Upgrading your systems with the new options will bring you great values with flexibility, scalability, field-proven reliability.

Hard Drives & RAIDGet uncompromising performance & high reliability while keeping your critical data safe with ThinkServer hard disk drives, solid-state drives, & RAID storage options.

"ThinkPad 1TB SAMSUNG PCIe NVME TLC OPAL M.2 SSD supporting PCIe 3.0 interface standard up to 4 lanes shows much faster performance than previous SATA SSDs.It's sequential performance is up to 300MB/s for read operation and 1700MB/s for write operation by 4 lanes.Test-Prove 100% Compatible with ThinkPad machines. "

Lenovo 4TB Performance PCIe Gen4 NVMe OPAL M.2 2280 SSD is a good choice to upgrade your ThinkPad notebook. It is qualified on select ThinkPad notebooks and is backed by a one year warranty.

Lenovo LENOVO 2.5IN U.2 PM9D3A 1.92TB RI HS

Lenovo LENOVO 2.5IN U.2 PM9D5A 1.6TB MU HS

Lenovo LENOVO 2.5IN U.2 PM9D3A 15.36TB RI HS

Lenovo LENOVO 2.5IN U.2 PM9D3A 7.68TB RI HS