Lenovo Thinksystem Pm1645 Mainstream Sas 12gb Ssds User Guide

ThinkSystem PM1645 Mainstream SAS 12Gb SSDs
User Guide

ThinkSystem PM1645 Mainstream SAS 12Gb SSDs

ThinkSystem PM1645 Mainstream SAS 12Gb SSDs
Product Guide (withdrawn product)
The ThinkSystem PM1645 Mainstream SAS 12Gb solid-state drives (SSDs) in capacities of up to 3.2 TB are next-generation high-performance SSDs suitable for a wide range of applications running on ThinkSystem servers. The PM1645 Mainstream SAS 12Gb SSD is shown in the following figure.

Figure 1. ThinkSystem PM1645 Mainstream SAS 12Gb SSD
Did you know?
Unlike SATA drives, the 12 Gb/s SAS interface on these drives supports full duplex data transfer for higher performance, as well as dual-port connectivity and enterprise-level error recovery for better availability. By combining the enhanced reliability of Samsung NAND flash memory silicon with NAND Flash management technologies, PM1645 SSDs deliver the extended endurance of up to 3 drive writes per day (DWPD) for 5 years, which is suitable for many enterprise applications.
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ThinkSystem PM1645 Mainstream SAS 12Gb SSDs (withdrawn product)

Part number information

The following tables list the information for ordering part numbers and feature codes.
Withdrawn from marketing: All the drives listed in the table below are now withdrawn from marketing
Table 1. Ordering part numbers and feature codes

The part numbers include the following items:

• One solid-state drive with a hot-swap tray
• Documentation flyer

Features

The PM1645 Mainstream SAS 12Gb SSDs have the following features:

• Mainstream server SSD suitable for mixed read-write-intensive workloads
• Endurance of 3 drive-writes per day (DWPD)
• 2.5-inch or 3.5-inch industry-standard form factor with hot-swap tray
• SAS 12 Gbps interface
• Active-active dual 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

Entry SSDs and Mainstream SSDs have similar read and write IOPS performance, but the key difference between them is their endurance (or lifetime) (that is, how long they can perform write operations because SSDs have a finite number of program/erase (P/E) cycles). Mainstream SSDs have better endurance but a lower cost/IOPS ratio compared to Entry 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.
ThinkSystem PM1645 Mainstream SAS 12Gb SSDs (withdrawn product)

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 the 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.
For example, the 1.6TB PM1645 SSD has an endurance of 8,760 TB of total bytes written (TBW). This means that for full operation over five years, the write workload must be limited to no more than 4,800 GB of writes per day, which is equivalent to 3.0 full drive writes per day (DWPD). For the device to last three years, the drive writes workload must be limited to no more than 8,000 GB of writes per day, which is equivalent to 5.0 full drive writes per day.

Technical specifications

The following tables present technical specifications for the PM1645 Mainstream SAS 12Gb SSDs.
Table 2. Technical specifications

ThinkSystem PM1645 Mainstream SAS 12Gb SSDs (withdrawn product)

Server support

The following tables list the ThinkSystem servers that are compatible.
Table 3. Server support (Part 1 of 2)

ThinkSystem PM1645 Mainstream SAS 12Gb SSDs (withdrawn product)
Table 4. Server support (Part 2 of 2)

Operating system support

SAS 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 product guide for more information:

• RAID controllers: https://lenovopress.com/servers/options/raid
• SAS HBAs: https://lenovopress.com/servers/options/hba

Warranty

The PM1645 Mainstream 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 system’s base warranty and any warranty upgrades.
Solid-state 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

PM1645 Mainstream 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: 140 g (4.9 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

PM1645 Mainstream 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
PM1645 Mainstream 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 publications and links

For more information, see the following documents:

• Lenovo Press product guides and papers on RAID adapters and HBAs https://lenovopress.com/servers/options/raid
• Lenovo RAID Management Tools and Resources https://lenovopress.com/lp0579-lenovo-raid-management-tools-and-resources
• Lenovo RAID Introduction https://lenovopress.com/lp0578-lenovo-raid-introduction

Related product families
Product families related to this document are the following:

• Drives

Notices

Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only the Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user’s responsibility to evaluate and verify the operation of any other product, program, or service. Lenovo may have patents or pending patent applications covering the subject matter described in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:
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Attention: Lenovo Director of Licensing
LENOVO PROVIDES THIS PUBLICATION ”AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow disclaimers of express or implied warranties in certain transactions, therefore, this statement may not apply to you.
This information could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. Lenovo may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice.
The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications or warranties. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or third parties. All information contained in this document was obtained in specific environments and is presented as an illustration. The result obtained in other operating environments may vary. Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.
Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this Lenovo product, and use of those Web sites is at your own risk. Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environments may vary significantly. Some measurements may have been made on development-level systems and there is no guarantee that these measurements will be the same on generally available systems. Furthermore, some measurements may have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment.
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This document, LP0928, was created or updated on March 1, 2022.
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ThinkSystem PM1645 Mainstream SAS 12Gb SSDs (withdrawn product)

References

• Lenovo RAID Introduction > Lenovo Press
• Lenovo RAID Management Tools and Resources (withdrawn product) > Lenovo Press
• Host Bus Adapters > Lenovo Press
• RAID Adapters > Lenovo Press
• ThinkSystem PM1645 Mainstream SAS 12Gb SSDs Product Guide (withdrawn product) > Lenovo Press
• Drives > Lenovo Press
• Copyright and Trademark Information | Lenovo US | Lenovo US