4XB7A38176 - Lenovo 2.5 PM1643A 1.92TB EN SAS SSD

Abstract The PM1643a Entry SAS 12Gb solid-state drives (SSDs) from Lenovo provide high-performance, reliable storage solutions for high-capacity enterprise applications. Designed for dense storage and with a 12 Gb SAS interface, these drives feature all the capacity and performance that is needed to replace large numbers of 15K rpm and 10K rpm spinning disks, and consolidate storage into tightly packed server configurations. This product guide provides essential presales information to understand the PM1643a Entry SAS 12Gb SSD offerings and their key features, specifications, and compatibility. This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about the SSDs and consider their use in IT solutions. Introduction The ThinkSystem PM1643a Entry SAS 12Gb solid-state drives (SSDs) are next-generation SSDs suitable for a wide range of applications. The PM1643a SAS SSDs are designed for dense storage and with a 12 Gb SAS interface, these drives feature all the capacity and performance that is needed to replace large numbers of 15K rpm and 10K rpm spinning disks, and consolidate storage into tightly packed server configurations. The PM1643a SSDs are the follow-on to the PM1643 SSDs and offer improved random write performance. Did you know? Unlike SATA drives, the 12 Gb/s SAS interface on PM1643a drives supports full duplex data transfer for higher performance, as well as enterprise-level error recovery for better availability. Rigorous testing of PM1643a Entry SATA SSDs by Lenovo through the ServerProven program assures a high degree of storage subsystem compatibility and reliability. Providing additional peace of mind, these drives are covered under Lenovo warranty. SSDs have a huge but finite number of program/erase (P/E) cycles, which affect how long they can perform write operations and thus their life expectancy. Entry SSDs typically have a better cost per read IOPS ratio but lower endurance and performance compared to Mainstream or Performance SSDs. SSD write endurance is typically measured by the number of 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 of P/E cycles) that a drive can be guaranteed to complete (% of remaining P/E cycles = % of remaining TBW). Reaching this limit does not cause the drive to immediately fail. It simply denotes the maximum number of writes that can be guaranteed. A solid-state device will not fail upon reaching the specified TBW. At some point based on manufacturing variance margin, after surpassing the TBW value, the drive will reach the end-of-life point, at which the drive will go into a read-only mode.

 

Specification:

 

Hard drive
SSD capacity	1920 GB
Memory type	TLC
Data transmission
Read speed	540 MB/s
Write speed	520 MB/s
Random write (4KB)	30000 IOPS
Random read (4KB)	95000 IOPS
Write latency	700 µs
Read latency	550 µs
Data transfer rate	6 Gbit/s
Endurance
Uncorrectable Bit Error Rate (UBER)	< 1 per 10^17 bits read
Mean time between failures (MTBF)	3000000 h
Performance
Interface	Serial ATA III
Component for	Server/workstation
TBW rating	5256
SSD capacity	1920 GB
Read speed	540 MB/s
Write speed	520 MB/s
Memory type	TLC
Uncorrectable Bit Error Rate (UBER)	< 1 per 10^17 bits read
Random write (4KB)	30000 IOPS
Random read (4KB)	95000 IOPS
Mean time between failures (MTBF)	3000000 h
Write latency	700 µs
Read latency	550 µs
Data transfer rate	6 Gbit/s
Design
Component for	Server/workstation
SSD form factor	M.2
Features
Interface	Serial ATA III
Component for	Server/workstation
TBW rating	5256
SSD capacity	1920 GB
Read speed	540 MB/s
Write speed	520 MB/s
Memory type	TLC
Uncorrectable Bit Error Rate (UBER)	< 1 per 10^17 bits read
Random write (4KB)	30000 IOPS
Random read (4KB)	95000 IOPS
Mean time between failures (MTBF)	3000000 h
Write latency	700 µs
Read latency	550 µs
Data transfer rate	6 Gbit/s
SSD form factor	M.2
Power
Power consumption (average)	3.8 W
Operational conditions
Operating shock	1500 G
Operating vibration	3.13 G
Technical details
Interface	Serial ATA III
Operating shock	1500 G
Operating vibration	3.13 G
SSD form factor	M.2
Other features
Uncorrectable Bit Error Rate (UBER)	< 1 per 10^17 bits read