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ThinkSystem PM1643a Entry 12Gb SAS SSDs

Product Guide

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5 Jun 2023
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LP1257
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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.

Change History

Changes in the June 5, 2023 update:

  • The following 2.5-inch drives are now withdrawn from marketing:
    • ThinkSystem 2.5" PM1643a 1.92TB Entry SAS 12Gb Hot Swap SSD, 4XB7A38176
    • ThinkSystem 2.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD, 4XB7A17054
    • ThinkSystem 2.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD, 4XB7A17055
  • The following 3.5-inch drives are now withdrawn from marketing:
    • ThinkSystem 3.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD, 4XB7A17058
    • ThinkSystem 3.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD, 4XB7A17059

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.

ThinkSystem PM1643 Capacity SAS 12Gb SSDs
Figure 1. ThinkSystem PM1643a 12Gb SAS SSDs

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.

Part number information

The following table lists the part numbers and feature codes for ThinkSystem servers.

Table 1. Ordering part numbers and feature codes - ThinkSystem
Part number Feature code Description
2.5-inch hot-swap drives
4XB7A38175 B91A ThinkSystem 2.5" PM1643a 960GB Entry SAS 12Gb Hot Swap SSD
4XB7A38176 B91B ThinkSystem 2.5" PM1643a 1.92TB Entry SAS 12Gb Hot Swap SSD
4XB7A17054 B91C ThinkSystem 2.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD
4XB7A17055 B91D ThinkSystem 2.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD
4XB7A17056 BC4R ThinkSystem 2.5" PM1643a 15.36TB Entry SAS 12Gb Hot Swap SSD
3.5-inch hot-swap drives
4XB7A17058 B91E ThinkSystem 3.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD
4XB7A17059 BEVK ThinkSystem 3.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD

Features

The ThinkSystem PM1643a Entry SAS SSDs have the following features:

  • Enterprise-grade SSD suitable for read-intensive workloads
  • Based on Samsung 64-layer V-NAND technology and TLC flash memory
  • Endurance of 1 drive-write per day (DWPD) over 5 years
  • 2.5-inch or 3.5-inch industry standard form factor with hot-swap tray
  • SAS 12 Gbps interface
  • Single port host interface
  • Protect data integrity from unexpected power loss with Samsung's advanced power-loss protection architecture
  • Supports Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T)
  • End-to-end data protection
  • Support 16 Initiator with Tag Command Queuing (TCQ) Command Set with a queue-depth of up to 128 commands
  • Compliant with SCSI Specification (SAS-3 / SPL-3 / SBC-4 / SPC-4 / SAM-5)
  • RoHS Compliant

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.

Technical specifications

The following tables present technical specifications for the PM1643a Entry SSDs.

Table 2. Technical specifications
Feature 960 GB drive 1.92 TB drive 3.84 TB drive 7.68 TB drive 15.36 TB drive
Interface 12 Gbps SAS 12 Gbps SAS 12 Gbps SAS 12 Gbps SAS 12 Gbps SAS
Capacity 960 GB 1.92 TB 3.84 TB 7.68 TB 15.36 TB
SED encryption None None None None None
Endurance
(drive writes per day for 5 years)		 1 DWPD 1 DWPD 1 DWPD 1 DWPD 1 DWPD
Endurance
(total bytes written)		 1,752 TB 3,504 TB 7,008 TB 14,016 TB 28,032 TB
Data reliability
(UBER)		 < 1 in 1017 bits read < 1 in 1017 bits read < 1 in 1017 bits read < 1 in 1017 bits read < 1 in 1017 bits read
MTBF 2,000,000 hours 2,000,000 hours 2,000,000 hours 2,000,000 hours 2,000,000 hours
IOPS reads (4 KB blocks) 230,000 230,000 230,000 230,000 230,000
IOPS writes (4 KB blocks) 40,000 60,000 85,000 90,000 65,000
Sequential read rate
(128 KB blocks)		 1,000 MBps 1,000 MBps 1,000 MBps 1,000 MBps 1,000 MBps
Sequential write rate
(128 KB blocks)		 1,000 MBps 1,000 MBps 1,000 MBps 1,000 MBps 1,000 MBps
Read latency (sequential) 240 µs 240 µs 240 µs 240 µs 240 µs
Write latency (sequential) 220 µs 220 µs 220 µs 220 µs 220 µs
Read latency (random) 120 µs 120 µs 120 µs 130 µs 130 µs
Write latency (random) 45 µs 45 µs 45 µs 45 µs 45 µs
Shock, non-operating 1,500 G (Max) at 0.5 ms 1,500 G (Max) at 0.5 ms 1,500 G (Max) at 0.5 ms 1,500 G (Max) at 0.5 ms 1,500 G (Max) at 0.5 ms
Vibration, non-operating 20 GRMS (10-2000 Hz) 20 GRMS (10-2000 Hz) 20 GRMS (10-2000 Hz) 20 GRMS (10-2000 Hz) 20 GRMS (10-2000 Hz)
Typical power (R / W) 9 W / 12 W 9 W / 12 W 9 W / 12 W 9 W / 12 W 9 W / 12 W

Server support

The following tables list the ThinkSystem servers that are compatible.

Table 3. Server support (Part 1 of 3)
Part Number Description Edge 1S Intel V2 AMD V3 Intel V3
SE350 (7Z46 / 7D1X)
SE350 V2 (7DA9)
SE360 V2 (7DAM)
SE450 (7D8T)
SE455 V3 (7DBY)
ST50 V2 (7D8K / 7D8J)
ST250 V2 (7D8G / 7D8F)
SR250 V2 (7D7R / 7D7Q)
SR635 V3 (7D9H / 7D9G)
SR655 V3 (7D9F / 7D9E)
SR645 V3 (7D9D / 7D9C)
SR665 V3 (7D9B / 7D9A)
SR675 V3 (7D9Q / 7D9R)
ST650 V3 (7D7B / 7D7A)
SR630 V3 (7D72 / 7D73)
SR650 V3 (7D75 / 7D76)
SR850 V3 (7D97 / 7D96)
SR860 V3 (7D94 / 7D93)
SR950 V3 (7DC5 / 7DC4)
2.5-inch hot-swap drives
4XB7A38175 ThinkSystem 2.5" PM1643a 960GB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
4XB7A38176 ThinkSystem 2.5" PM1643a 1.92TB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
4XB7A17054 ThinkSystem 2.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
4XB7A17055 ThinkSystem 2.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
4XB7A17056 ThinkSystem 2.5" PM1643a 15.36TB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
3.5-inch hot-swap drives
4XB7A17058 ThinkSystem 3.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
4XB7A17059 ThinkSystem 3.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD N N N N N N N N N N N N N N N N N N N
Table 4. Server support (Part 2 of 3)
Part Number Description Dense V3 2S Intel V2 AMD V1 Dense V2 4S V2 8S
SD665 V3 (7D9P)
SD665-N V3 (7DAZ)
SD650 V3 (7D7M)
SD650-I V3 (7D7L)
ST650 V2 (7Z75 / 7Z74)
SR630 V2 (7Z70 / 7Z71)
SR650 V2 (7Z72 / 7Z73)
SR670 V2 (7Z22 / 7Z23)
SR635 (7Y98 / 7Y99)
SR655 (7Y00 / 7Z01)
SR655 Client OS
SR645 (7D2Y / 7D2X)
SR665 (7D2W / 7D2V)
SD630 V2 (7D1K)
SD650 V2 (7D1M)
SD650-N V2 (7D1N)
SN550 V2 (7Z69)
SR850 V2 (7D31 / 7D32)
SR860 V2 (7Z59 / 7Z60)
SR950 (7X11 / 7X12)
2.5-inch hot-swap drives
4XB7A38175 ThinkSystem 2.5" PM1643a 960GB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y Y Y Y N Y Y N N N N Y Y Y
4XB7A38176 ThinkSystem 2.5" PM1643a 1.92TB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y Y Y Y N Y Y N N N N Y Y Y
4XB7A17054 ThinkSystem 2.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y Y Y Y N Y Y N N N N Y Y Y
4XB7A17055 ThinkSystem 2.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y Y Y Y N Y Y N N N N Y Y Y
4XB7A17056 ThinkSystem 2.5" PM1643a 15.36TB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y Y N N N Y Y N N N N Y Y Y
3.5-inch hot-swap drives
4XB7A17058 ThinkSystem 3.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y N Y Y N Y Y N N N N N N N
4XB7A17059 ThinkSystem 3.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD N N N N Y Y Y N Y Y N Y Y N N N N N N N
Table 5. Server support (Part 3 of 3)
Part Number Description 4S V1 1S Intel V1 2S Intel V1 Dense V1
SR850 (7X18 / 7X19)
SR850P (7D2F / 2D2G)
SR860 (7X69 / 7X70)
ST50 (7Y48 / 7Y50)
ST250 (7Y45 / 7Y46)
SR150 (7Y54)
SR250 (7Y52 / 7Y51)
ST550 (7X09 / 7X10)
SR530 (7X07 / 7X08)
SR550 (7X03 / 7X04)
SR570 (7Y02 / 7Y03)
SR590 (7X98 / 7X99)
SR630 (7X01 / 7X02)
SR650 (7X05 / 7X06)
SR670 (7Y36 / 7Y37)
SD530 (7X21)
SD650 (7X58)
SN550 (7X16)
SN850 (7X15)
2.5-inch hot-swap drives
4XB7A38175 ThinkSystem 2.5" PM1643a 960GB Entry SAS 12Gb Hot Swap SSD Y Y Y N N N N Y Y Y Y Y Y Y N Y N Y Y
4XB7A38176 ThinkSystem 2.5" PM1643a 1.92TB Entry SAS 12Gb Hot Swap SSD Y Y Y N N N N Y Y Y Y Y Y Y N Y N Y Y
4XB7A17054 ThinkSystem 2.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD Y Y Y N N N N Y Y Y Y Y Y Y N Y N Y Y
4XB7A17055 ThinkSystem 2.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD Y Y N N N N N Y Y Y N N Y Y N N N Y Y
4XB7A17056 ThinkSystem 2.5" PM1643a 15.36TB Entry SAS 12Gb Hot Swap SSD Y N Y N N N N N Y N Y Y Y Y N N N Y Y
3.5-inch hot-swap drives
4XB7A17058 ThinkSystem 3.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD N N N N N N N Y Y Y Y Y Y Y N N N N N
4XB7A17059 ThinkSystem 3.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD N N N N N N N Y Y Y N N Y Y N N N N N

Operating system support

SSDs operate transparently to users, storage systems, applications, databases, and operating systems.

Operating system support is based on the controller used to connect to the drives. Consult the controller propduct guide for more information:

Warranty

The PM1643a Entry SAS 12Gb SSDs carry a one-year, customer-replaceable unit (CRU) limited warranty. When the SSDs are installed in a supported server, these drives assume the server’s base warranty and any warranty upgrades.

Solid State Memory cells have an intrinsic, finite number of program/erase cycles that each cell can incur. As a result, each solid state device has a maximum amount of program/erase cycles to which it can be subjected. The warranty for Lenovo solid state drives (SSDs) is limited to drives that have not reached the maximum guaranteed number of program/erase cycles, as documented in the Official Published Specifications for the SSD product. A drive that reaches this limit may fail to operate according to its Specifications.

Physical specifications

The PM1643a Entry SAS 12Gb SSDs have the following physical specifications:

Dimensions and weight (approximate, without the hot-swap tray, if applicable):

  • Height: 15 mm (0.6 in.)
  • Width: 70 mm (2.8 in.)
  • Depth: 100 mm (4.0 in.)
  • Weight: 158 g (5.6 oz)

Shipping dimensions and weight for the 2.5-inch drives (approximate):

  • Height: 63 mm (2.5 in.)
  • Width: 133 mm (5.2 in.)
  • Depth: 174 mm (6.9 in.)

Shipping dimensions and weight for the 3.5-inch drives (approximate):

  • Height: 95 mm (3.7 in.)
  • Width: 194 mm (7.6 in.)
  • Depth: 257 mm (10.0 in.)

Operating environment

The PM1643a Entry SAS 12Gb SSDs are supported in the following environment:

  • Temperature, operating: 0 - 70 °C (32 - 158 °F)
  • Temperature, non-operating: -40 to 85 °C (-40 - 185 °F)
  • Relative humidity: 5 - 95% (noncondensing)
  • Maximum altitude: -300 - 4,572 m (-1,000 to 15,000 feet)

Agency approvals

The PM1643a Entry SAS 12Gb SSDs conform to the following regulations:

  • UL
  • TUV
  • FCC
  • IC
  • CB
  • CE Mark
  • C-Tick Mark
  • BSMI (Taiwan)
  • KCC (Korea EMI)
  • VCCI

Related product families

Product families related to this document are the following:

Trademarks

Lenovo and the Lenovo logo are trademarks or registered trademarks of Lenovo in the United States, other countries, or both. A current list of Lenovo trademarks is available on the Web at https://www.lenovo.com/us/en/legal/copytrade/.

The following terms are trademarks of Lenovo in the United States, other countries, or both:
Lenovo®
ServerProven®
ThinkSystem®

The following terms are trademarks of other companies:

Intel® is a trademark of Intel Corporation or its subsidiaries.

Other company, product, or service names may be trademarks or service marks of others.

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