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ThinkSystem SR950 手册
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Lenovo ThinkSystem SR950 Server
Product Guide
Lenovo ThinkSystem SR950 is designed for your most demanding, mission-critical workloads, such as in-
memory databases, large transactional databases, batch and real-time analytics, ERP, CRM, and
virtualized server workloads. The powerful 4U ThinkSystem SR950 can grow from two to eight Intel Xeon
Scalable Family processors, and with 96 DIMM sockets, supports up to 12 TB of high-speed memory. The
modular design of SR950 speeds upgrades and servicing with easy front or rear access to all major
subsystems to maximize server availability.
The SR950 packs numerous fault-tolerant and high-availability features into a high-density, 4U rack-
optimized design that reduces the space needed to support massive network computing operations and
simplify servicing.
The following figure shows the Lenovo ThinkSystem SR950.
Figure 1. Lenovo ThinkSystem SR950
Did you know?
The SR950 server supports up to eight processors in a single 4U chassis. You can upgrade from a 2-
socket system to an 8-socket system without having to replace the server enclosure or upgrade to a
physically larger design. The SR950 offers enterprise scalability and advanced RAS features to support
the most demanding mission-critical applications that require 24x7 operations.
Lenovo ThinkSystem SR950 Server 1
Click here to check for updates
Key features
Lenovo ThinkSystem SR950 is designed for your most demanding, mission-critical workloads, such as in-
memory databases, large transactional databases, batch and real-time analytics, ERP, CRM, and
virtualized server workloads. The powerful 4U ThinkSystem SR950 can grow from two to eight Intel Xeon
Processor Scalable Family CPUs, achieving up to 45% faster performance than the previous generation.
The modular design of SR950 speeds upgrades and servicing with easy front and rear access to all major
subsystems, to maximize server uptime.
Scalability and performance
The SR950 offers numerous features to boost performance, improve scalability, and reduce costs:
Dense server offering where up to 8 processors and 96 DIMMs are housed in only 4U of rack
space.
Offers a simple upgrade path that enables the server to be initially configured with 2 processors
and then later be upgraded to 8 processors simply by adding a compute tray and system boards.
Supports the Gold and Platinum level processors in the Intel Xeon Processor Scalable
Family, including the "top bin" highest-performing 205 W processors available from Intel.
Up to eight processors, each with up to 28 cores and 56 threads (for a total of up to 448 threads) to
maximize the concurrent execution of multithreaded applications.
Intelligent and adaptive system performance with Intel Turbo Boost Technology 2.0 allows
processor cores to run at maximum speeds during peak workloads by temporarily
exceeding processor TDP.
Intel Hyper-Threading Technology boosts performance for multithreaded applications by enabling
simultaneous multithreading within each processor core, up to two threads per core.
Intel Virtualization Technology integrates hardware-level virtualization hooks that allow operating
system vendors to better use the hardware for virtualization workloads.
Support for up to 96 TruDDR4 DIMMs operating at 2666 MHz means you have the fastest available
memory subsystem and memory capacity of up to 12 TB using 96x 128 GB 3DS RDIMMs.
Up to 24x 2.5-inch HDDs or SSDs provide a flexible and scalable all-in-one platform to meet your
increasing demands.
Of the 24x drive bays, support for up to 12 NVMe PCIe SSDs maximizes drive I/O performance, in
terms of throughput, bandwidth, IOPS, and latency.
The use of solid-state drives (SSDs) instead of, or along with, mechanical hard disk drives (HDDs),
can improve I/O performance. An SSD can support up to 100 times more I/O operations per second
(IOPS) than a typical HDD.
New high-speed RAID controllers provide 12 Gb SAS connectivity to the drive backplanes. A variety
of RAID adapters are available, with cache up to 4 TB and support for 12 drives on a single
controller.
Supports a new Lenovo-patented M.2 adapter design for convenient operating system boot
functions. Available M.2 adapters support either one M.2 drive, or two M.2 drives in a RAID 1
configuration, for the boot drive performance and reliability.
The server has a dedicated flexible LAN-on-motherboard (LOM) slot offering a variety of 10 GbE or
Gigabit Ethernet adapters that do not occupy one of the standard PCIe slots.
A total of up to 17 rear-accessible PCIe slots: 14 general-purpose PCIe 3.0 slots plus slots
dedicated to the LOM adapter and two ML2 adapters. In addition, the server has two internal slots
for RAID or HBA adapters.
The server offers PCI Express 3.0 I/O expansion capabilities that improve the theoretical maximum
bandwidth by almost 100% (8 GTps per link using 128b/130b encoding) compared to the previous
generation of PCI Express 2.0 (5 GTps per link using 8b/10b encoding).
Lenovo ThinkSystem SR950 Server 2
Availability and serviceability
The SR950 provides many features to simplify serviceability and increase system uptime:
The server offers Single Device Data Correction (SDDC, also known as Chipkill), Adaptive Double-
Device Data Correction (ADDDC, also known as Redundant Bit Steering or RBS), memory mirroring,
and memory rank sparing for redundancy in the event of a non-correctable memory failure.
The server offers hot-swap drives, supporting RAID redundancy for data protection and greater
system uptime.
The Dual M.2 Boot Adapter uses RAID-1 so that the two M.2 drives installed are configured as a
redundant pair.
The server has up to four hot-swap N+N redundant power supplies to help keep the server
operational in the event of a power supply or utility supply failure
Each compute tray has 6 hot-swap N+1 redundant fans (a total of 12 fans when two compute trays
are installed) to maximize availability for business-critical applications.
The power source-independent light path diagnostics functionality provides individual light path
LEDs that lead the technician to failed (or failing) components, which simplifies servicing, speeds up
problem resolution, and helps increase system availability.
The included LCD system information display panel provides greater diagnostic function by listing
all error messages and VPD data needed for a service call, thereby speeding problem resolution
and increasing system uptime.
Proactive Platform Alerts (including PFA and SMART alerts): Processors, voltage regulators,
memory, internal storage (SAS/SATA HDDs and SSDs, NVMe SSDs, M.2 storage, and flash storage
adapters), fans, power supplies, RAID controllers, and server ambient and subcomponent
temperatures. Alerts can be surfaced through the XClarity Controller to managers such as Lenovo
XClarity Administrator, VMware vCenter, and Microsoft System Center. These proactive alerts let
you take appropriate actions in advance of possible failure, thereby increasing server uptime and
application availability.
Solid-state drives (SSDs) offer more reliability than mechanical HDDs for greater uptime.
The built-in XClarity Controller continuously monitors system parameters, triggers alerts, and
performs recovery actions in case of failures to minimize downtime.
Built-in diagnostics in UEFI, using Lenovo XClarity Provisioning Manager, speed up troubleshooting
tasks to reduce service time.
Lenovo XClarity Provisioning Manager supports diagnostic functions and collects service data to
USB key drive or remote CIFS share folder for troubleshooting, to reduce servicing time.
Autorestart in the event of a momentary loss of AC power (based on power policy setting in the
XClarity Controller service processor)
Support for the XClarity Administrator Mobile app running on a supported smartphone and
connected to the server through the service-enabled USB port, enables additional local systems
management functions.
Three-year or one-year customer-replaceable unit and onsite limited warranty, 9 x 5 next business
day. Optional service upgrades are available.
Manageability and security
Powerful systems management features simplify local and remote management of the SR950:
The server includes an XClarity Controller (XCC) to monitor server availability and perform remote
management. XCC Enterprise is included as standard, which enables remote KVM and remote
media files (ISO and IMG image files), boot capture, and power capping.
Lenovo ThinkSystem SR950 Server 3
Lenovo XClarity Administrator offers comprehensive hardware management tools that help to
increase uptime, reduce costs and improve productivity through advanced server management
capabilities.
New UEFI-based Lenovo XClarity Provisioning Manager, accessible from F1 during boot, provides
system inventory information, graphical UEFI Setup, platform update function, RAID Setup wizard,
operating system installation function, and diagnostic functions.
Support for Lenovo XClarity Energy Manager which captures real-time power and temperature data
from the server and provides automated controls to lower energy costs.
Integrated Trusted Platform Module (TPM) 2.0 support enables advanced cryptographic
functionality, such as digital signatures and remote attestation.
Supports Secure Boot to ensure that only a digitally signed operating system can be used.
Supported with HDDs and SSDs as well as M.2 drives in the M.2 Adapter.
Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.
Intel Execute Disable Bit functionality can prevent certain classes of malicious buffer overflow
attacks when combined with a supported operating system.
Intel Trusted Execution Technology provides enhanced security through hardware-based resistance
to malicious software attacks, allowing an application to run in its own isolated space, protected
from all other software running on a system.
Energy efficiency
The SR950 offers the following energy-efficiency features to save energy, reduce operational costs, and
increase energy availability:
The server can be used in environments up to ASHRAE A4 with ambient temperatures up to 45 °C.
The server is Energy Star 2.1 compliant
Energy-efficient planar components help lower operational costs.
High-efficiency power supplies with 80 PLUS Platinum certifications
Intel Intelligent Power Capability powers individual processor elements on and off as needed, to
reduce energy draw.
Low-voltage 1.2 V DDR4 memory offers energy savings compared to 1.35 V and 1.5 V DDR3
DIMMs.
Solid-state drives (SSDs) consume as much as 80% less power than mechanical 2.5-inch HDDs.
The server uses hexagonal ventilation holes, which can be grouped more densely than round holes,
providing more efficient airflow through the system.
Optional Lenovo XClarity Energy Manager provide advanced data center power notification,
analysis, and policy-based management to help achieve lower heat output and reduced cooling
needs.
Lenovo ThinkSystem SR950 Server 4
Components and connectors
The following figure shows the front of the SR950 server.
Figure 2. Front view of the Lenovo ThinkSystem SR950
The following figure shows the rear of the SR950 server. The server has up to 17 PCIe slots, depending on
the riser cards selected and the number of processors installed.
Figure 3. Rear view of the Lenovo ThinkSystem SR950
Lenovo ThinkSystem SR950 Server 5
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