Lenovo ThinkSystem PM1643a Entry 12Gb SAS SSDs User Guide
- June 3, 2024
- Lenovo
Table of Contents
Lenovo ThinkSystem PM1643a Entry 12Gb SAS SSDs
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.
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
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.
SD 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
ThinkSystem PM1643a Entry 12Gb SAS SSDs
Server support
The following tables list the ThinkSystem servers that are compatible
.
Table 3. Server support (Part 1 of 2)
ThinkSystem PM1643a Entry 12Gb SAS SSDs
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:
RAID controllers:
https://lenovopress.com/servers/options/raid
SAS HBAs: https://lenovopress.com/servers/options/hba
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
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 -
Samsung Enterprise SSDs home page
https://www.samsung.com/semiconductor/ssd/enterprise-ssd/
Related product families
Product families related to this document are the following:
- Drives
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References
- Lenovo RAID Introduction > Lenovo Press
- Lenovo RAID Management Tools and Resources (withdrawn product) > Lenovo Press
- RAID Adapters > Lenovo Press
- ThinkSystem PM1643a Entry 12Gb SAS SSDs Product Guide > Lenovo Press
- Copyright and Trademark Information | Lenovo US | Lenovo US
- Enterprise SSD | SSD | Samsung Semiconductor Global