Lenovo ThinkSystem SR850 Server (Xeon SP Gen 1)

The Lenovo ThinkSystem SR850 is a 4-socket server that features a streamlined 2U rack design that is optimized for price and performance, with best-in-class flexibility and expandability. Models of the SR850 are powered by up to four Intel Xeon Processor Scalable Family processors, each with up to 28 cores, for an efficient 4-socket solution. The ThinkSystem SR850’s agile design provides rapid upgrades for processors and memory, and its large, flexible storage capacity helps to keep pace with data growth.

Suggested uses: General business consolidation, data analytics, virtualization, database, dense computing and scientific applications

Figure 1. Lenovo ThinkSystem SR850

With a dense 2U design, the Lenovo ThinkSystem SR850 provides advanced features and capabilities. These include support for up to four sockets and 48 DIMMs, mix and match internal storage, and enterprise-grade systems management with the embedded Lenovo XClarity Controller.

The SR850 has space for 16x 2.5-inch drive bays, up to 8 of which can be configured as AnyBay drives - supporting SAS, SATA or NVMe drives. NVMe drives are high-speed, low-latency storage, ideal for storage tiering. The server also offers easy expansion, with up to nine PCIe slots (two of which are x16) and up to 2 (mirrored) M.2 drives for rapid OS boot, faster than either USB keys or SD cards.

The flexible ThinkSystem SR850 server can scale from two to four Intel Xeon Gold or Platinum processors, delivering significantly faster performance than the previous generation. Built for standard workloads like general business applications and server consolidation, it can also accommodate high-growth areas such as databases and virtualization. The ThinkSystem SR850’s agile design permits rapid upgrades for processors and memory, and its large, flexible storage capacity helps to keep pace with data growth.

With the capability to support up to 48 DIMMs, four sockets, mix-and-match internal storage with up to 16 drives, and a dedicated slot for Gigabit or 10 GbE networking, the SR850 provides unmatched features and capabilities in a dense 2U rack-mount design.

Scalability and performance

The SR850 offers numerous features to boost performance, improve scalability and reduce costs: 

• Supports Gold and Platinum level processors in the Intel Xeon Processor Scalable Family. Processors supported have up to 28 cores, core speeds of up to 3.6GHz, L3 cache sizes up to 38.5 MB, and TDP ratings of up to 205W.
• The SR850's processor mezzanine tray design enables you to start with two processors and 24 DIMM sockets and upgrade to four processors and 48 DIMM sockets when you need it, helping lower initial costs and manage growth.
• Up to four processors, 112 cores, and 226 threads 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 going beyond 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 48 TruDDR4 memory DIMMs operating at 2666 MHz means you have the fastest available memory subsystem and memory capacity of up to 3.0 TB using 48x 64 GB LRDIMMs (all processors) or 6.0 TB using 48x 128 GB 3DS RDIMMs (requires M-suffix processors).
• The use of solid-state drives (SSDs) instead of, or along with, traditional spinning 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.
• Up to 16x 2.5-inch drive bays -- supporting combinations of SAS or SATA HDDs, SAS or SATA SSDs, and NVMe PCIe SSDs -- provide a flexible and scalable all-in-one platform to meet your increasing demands.
• Support for up to 8x NVMe PCIe SSDs in a 2.5-inch form factor maximizes drive I/O performance, in terms of throughput, bandwidth, and latency.
• New high-speed RAID controllers from Broadcom provide 12 Gb SAS connectivity to the drive backplanes. A variety of RAID adapters are available, with cache up to 4 GB and support for 16 drives on a single controller.
• Supports a new Lenovo patented-design M.2 adapter 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 boot drive performance and reliability.
• The server has a dedicated flexible LAN-on-motherboard (LOM) slot, supporting a variety of 10 GbE or Gigabit Ethernet adapters that do not occupy one of the standard PCIe slots.
• A total of up to 9 general-purpose PCIe 3.0 slots plus slots dedicated to the LOM adapter and the M.2 adapter.
• 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).

Availability and serviceability

The SR850 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 supports RAID-1 which enables two installed M.2 drives to be configured as a redundant pair.
• The server has up to two hot-swap redundant power supplies and six hot-swap redundant fans to provide availability for business-critical applications.
• The power-source-independent light path diagnostics uses LEDs to lead the technician to failed (or failing) components, which simplifies servicing, speeds up problem resolution, and helps improve system availability.
• The optional LCD system information display panel provides more detailed diagnostics by displaying all error messages and VPD data needed for a service call, thereby aiding with problem resolution and 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, flash storage adapters), fans, power supplies, RAID controllers, 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 traditional 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 collects and saves service data to USB key drive or remote CIFS share folder, for troubleshooting and to reduce service time.
• Auto restart in the event of a momentary loss of AC power (based on the 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 SR850:

• Lenovo XClarity Controller (XCC) monitors server availability and performs remote management. XCC Advanced is standard, which enables remote KVM. Optional XCC Enterprise enables the mounting of remote media files (ISO and IMG image files), boot capture, and power capping.
• 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 methods, such as digital signatures and remote attestation.
• Supports Secure Boot to ensure 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 SR850 offers the following energy-efficiency features to save energy, reduce operational costs, and increase energy availability:

• Energy-efficient planar components help lower operational costs.
• High-efficiency power supplies with 80 PLUS Platinum certifications
• Intel Intelligent Power Capability turns individual processor elements on and off as needed to reduce power 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 traditional spinning 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 and thus keeping your system cooler.
• Optional Lenovo XClarity Energy Manager provides advanced data center power notification, analysis, and policy-based management to help achieve lower heat output and reduced cooling needs.

The following figure shows the architectural block diagram of the SR850, showing the major components and their connections.

Figure 5. SR850 architectural block diagram

The following table lists the standard specifications.

The SR850 servers are shipped with the following items:

• ThinkSystem Toolless Slide Rail
• Documentation flyer
• Power cords (model and region dependent)

ThinkSystem SR850 models can be configured by using the Lenovo Data Center Solution Configurator (DCSC).

Configure-to-order (CTO) models are used to create models with factory-integrated server customizations. For CTO models, two types of base CTO models are available for the SR850 as listed in the columns in the following table:

• General purpose base CTO models are for general business (non-HPC) and is selectable by choosing General Purpose mode in DCSC.
• AI and HPC base models are intended for Artificial Intelligence (AI) and High Performance Computing (HPC) configurations and solutions are enabled using the AI & HPC Hardware - ThinkSystem Hardware mode in DCSC. These configurations, along with Lenovo EveryScale Solutions, can also be built using System x and Cluster Solutions Configurator (x-config). Tip: Some HPC and AI models are not listed in DCSC and can only be configured in x-config.

Preconfigured server models may also be available for the SR850, however these are region-specific; that is, each region may define their own server models, and not all server models are available in every region.

The following table lists the base CTO models of the ThinkSystem SR850 server.

The following tables list the available models, grouped by region.

• Models for Australia and New Zealand
• Models for South East Asian regions (ASEAN)
• Models for EMEA regions
• Models for Hong Kong, Taiwan, Korea (HTK)
• Models for India
• Models for Japan
• Models for Latin American regions (except Brazil)
• Models for USA and Canada

Models for Australia and New Zealand

All models have the following common features:

• No included drives (open drive bays)
• XCC Advanced with an available upgrade to XCC Enterprise
• No power cords included; ensure desired power cords are added to the order
• Slide Rail Kit (cable management arm is available but not included)

† Processor detail: Quantity, model, core count, TDP, core frequency

† Processor detail: Quantity, model, core count, TDP, core frequency

The SR850 supports Gold and Platinum level processors in the Intel Xeon Processor Scalable Family.

The server supports up to four processors:

• Processors 1 and 2 are installed in sockets on the system board.
• Processors 3 and 4 are installed on the Processor and Memory Expansion Tray.

The SR850 Processor and Memory Expansion Tray has a patent-pending sliding and rolling lift mechanism that requires only a one-handed operation to insert or remove from the server. It has a toolless design for superior usability, serviceability and reliability. 

Figure 6. SR850 Processor and Memory Expansion Tray

The ordering information for the Processor and Memory Expansion Tray is shown in the following table.

The following processor quantities are supported:

• Two processors, installed in sockets 1 and 2, without the Processor and Memory Expansion Tray
• Four processors, installed in all four sockets
• Configurations of one processor or three processors are supported via Special Bid

The SR850 supports the Intel Xeon Processor Scalable Family options listed in the following table.

All supported processors have the following characteristics:

• 14 nm process technology
• Six DDR4 memory channels
• 48 PCIe 3.0 I/O lanes
• 1 MB L2 cache
• 1.375 MB L3 cache per core (except where larger, as noted with ** in the table below)
• Intel Hyper-Threading Technology
• Intel Turbo Boost Technology 2.0
• Intel Advanced Vector Extensions 512 (AVX-512)
• Intel Ultra Path Interconnect (UPI) links at 10.4 GT/s (replaces QPI)

With two processors installed, the two processors are connected together using one UPI link. With four processors installed, the processors are connected together using a ring topology, using two UPI links, one to each adjacent processor in the ring.

Processors with the T suffix have more robust thermal characteristics (higher T-case). Processors with the M suffix support greater than 768 GB per processor.

* All Gold 5000-level processors, except the 5122, support 2400 MHz memory speeds and have one AVX-512 512-bit FMA units. The 5122 processor supports 2666 MHz and has two FMA units
** L3 cache is 1.375 MB per core except for processor indicated with ** where the cache size is larger
† These high-performance processors have high thermal requirements and can only be ordered in a configure-to-order (CTO) configuration. No field upgrade of processors is supported. In addition, if these processors are used, then no backplanes or drives can be installed, and there are cooling restrictions. See the Internal storage and Cooling sections for details.

The SR850 server supports TruDDR4 memory. TruDDR4 memory uses the highest-quality components sourced from Tier 1 DRAM suppliers and only memory that meets strict tolerances is selected. It is compatibility tested and tuned to maximize performance and reliability.

TruDDR4 memory has a unique signature programmed into the DIMM, which enables ThinkSystem servers to verify whether the memory installed is qualified and supported. From a service and support standpoint, TruDDR4 memory automatically assumes the system's warranty, and service and support provided worldwide.

The SR850 supports up to 12 DIMMs per processor, for a total of 48 DIMMs when four processors are installed. Each processor has six memory channels, and supports one or two DIMMs per channel.

All DIMMs can operate at a speed of 2666 MHz, both at 1 DIMM per channel and 2 DIMMs per channel. However, if the processor selected has a lower memory bus speed (eg 2400 MHz), then all DIMMs will operate at that lower speed.

The following table lists the memory options that are available for the SR850 server.

The following rules apply when selecting the memory configuration:

• The server supports RDIMMs, LRDIMMs and 3DS RDIMMs. UDIMMs are not supported.
• Mixing RDIMMs and LRDIMMs is not supported.
• Mixing 3DS RDIMMs with either RDIMMs or LRDIMMs is not supported.
• Mixing x4 and x8 DIMMs is supported.
• When mixing 16 GB and 32 GB DIMMs in the same configuration, use 16GB 2Rx8 DIMMs instead of 16 GB 1Rx4 DIMMs for better performance
• For best performance, populate memory DIMMs in quantities of 6 or 12 per processor, so that all memory channels are used.

The following memory protection technologies are supported:

• ECC
• SDDC (for x4-based memory DIMMs; look for "x4" in the DIMM description)
• ADDDC (for x4-based memory DIMMs)
• Memory channel mirroring
• Memory rank sparing

If memory channel mirroring is used, then DIMMs must be installed in pairs (minimum of one pair per processor), and both DIMMs in a pair must be identical in type and size. 50% of the installed capacity is available to the operating system.

If memory rank sparing is used, then a minimum of one quad-rank DIMM or two single-rank or dual-rank DIMMs must be installed per populated channel (the DIMMs do not need to be identical). In rank sparing mode, one rank of a DIMM in each populated channel is reserved as spare memory. The largest rank in the channel will be automatically selected as the spare rank. The amount of memory available to the operating system depends on the number, capacity and rank counts of the DIMMs installed.

The server can support up to 16x 2.5-inch drives, SAS, SATA or NVMe, depending on the selected backplane configuration. You can mix drives in the same server, but not in the same array. Drives are all installed from the front of the server. The server also supports one or two M.2 drives, installed in an M.2 adapter.

In this section:

• Backplanes and drive bays
• Adapters and cabling
• Field upgrades
• M.2 drives
• SED encryption key management with ISKLM

Backplanes and drive bays

The SR850 supports various internal storage configurations based on two different backplanes:

• 8-drive SAS/SATA backplane for 8x 2.5-inch SAS or SATA drives
• 8-drive SAS/SATA+AnyBay backplane for either:
  • 8x 2.5-inch SAS or SATA drives
  • 4x 2.5-inch SAS or SATA drives + 4x 2.5-inch U.2 (NVMe) drives

For configure-to-order (CTO) configurations, ordering information for the backplanes is in the following table.

* Backplanes are configure-to-order (CTO) only; however, upgrade kits are available that include backplanes, as described in the Field upgrades section below.

Regular 2.5-inch SAS/SATA drive bays support only SAS or SATA drives, however the Lenovo AnyBay drive bay design allows a choice of SATA, SAS or NVMe drives. This design enables the flexibility to configure some of the bays with high-performance PCIe SSDs and still use the remaining bays for high-capacity HDDs, which is the ideal solution for storage tiering.

Backplane connections are as follows:

• The 8-drive SAS/SATA backplane has two SAS/SATA connectors and connects to a supported RAID controller or SAS HBA.
• The 8-drive SAS/SATA+AnyBay backplane has two SAS/SATA connectors and connects to a supported RAID controller or SAS HBA plus four PCIe connectors to connect to either two PCIe connectors on the Processor and Memory Expansion Tray (see Figure 4), or four PCIe connectors on a NVMe Switch adapter installed in a PCIe slot.

The first five configurations are shown in the following figure.

Figure 7. Drive bay configurations

Field upgrades

This section describes how customers can upgrade their 8-bay configurations after the initial purchase of the server. The two backplane upgrade kits are listed in the following table.

The ThinkSystem SR850 2.5" SATA/SAS 8-Bay BP Kit, 7C57A03998, contains the following items:

• 1x 8-bay SAS/SATA backplane
• 1x backplane power cable
• 2x 900mm SAS/SATA cables
• 2x 720mm SAS/SATA cables
• 8x 1-bay fillers

The ThinkSystem SR850 2.5" AnyBay 8-Bay BP Kit, 7C57A03999, contains the following items:

• 1x 8-bay AnyBay backplane (4 SAS/SATA connectors, 4 AnyBay connectors)
• 1x backplane power cable
• 1x 900mm SAS/SATA cable
• 1x 720mm SAS/SATA cable
• 4x 750mm NVMe cables for use with NVMe Switch Adapter
• 2x 900mm NVMe cables for use with onboard NVMe ports

In addition to the backplane kits, you will need a RAID adapter or HBA, and for some upgrades you may also need an NVMe adapter. Upgrades needed are listed in the following two tables. Upgrading from an 8-port SAS/SATA adapter to a 16-port SAS/SATA adapter is supported, however that requires removing the existing 8-port adapter.

The following table lists the available upgrades for SR850 servers with a single SAS/SATA backplane (See Configuration 1 above).

The following table lists the available upgrades for SR850 servers with a single AnyBay backplane (See Configuration 2 above).

The M.2 drives install into an M.2 adapter which in turn is installed in a dedicated slot on the system board. See the internal view of the server in the Components and connectors section for the location of the M.2 slot.

Supported drives are listed in the Internal drive options section.

For details about M.2 components, see the ThinkSystem M.2 Drives and M.2 Adapters product guide:
https://lenovopress.com/lp0769-thinksystem-m2-drives-adapters

The IBM Security Key Lifecycle Manager software is available from Lenovo using the ordering information listed in the following table.

The SR850 supports internal SAS and SATA drives with the addition of a RAID adapter or HBA. For NVMe support, the server offers two onboard NVMe ports on the processor and memory expansion tray (with four processors) and two ports with the use of an NVMe Switch Adapter.

The following table lists the adapters used for the internal storage of the SR850 server.

* * The RAID 730-8i 1GB Cache adapter is not available in USA and Canada.

The following two tables compare the functions of the storage adapters.

The following tables list the hard disk drive and solid-state drive options for the internal disk storage of the server.

USB memory key

For general portable storage needs, the server also supports the USB memory key option that is listed in the following table.

* Field upgrade only.

The server does not supports any internal backup units, such as tape drives or RDX drives. 

The server supports the external USB optical drive listed in the following table.

The drive is based on the Lenovo Slim DVD Burner DB65 drive and supports the following formats: DVD-RAM, DVD-RW, DVD+RW, DVD+R, DVD-R, DVD-ROM, DVD-R DL, CD-RW, CD-R, CD-ROM.

The server supports up to 9 PCIe 3.0 slots, plus a slot for the LOM adapter and a slot for the M.2 adapter.

Six PCIe 3.0 slots (1, 2, 8, 9, 10, 11) are on the system board and three slots (slots 3-5) are through a riser card. A riser card is standard on some models and optional on others. The LOM slot (slot 7) is also vertically mounted on the system board. All slots are available with two processors.

The PCIe slots are as follows:

• Slot 1: PCIe 3.0 x16 (low profile) (CPU 2)
• Slot 2: PCIe 3.0 x8 (low profile, x8 physical slot) (CPU 2)
• Slot 3-5: Riser card slots (see below) (CPU 2)
• Slot 6: PCIe 2.0 x2 dedicated to M.2 adapter and drives
• Slot 7: Dedicated to Ethernet LOM phy adapter (CPU 1)
• Slot 8: PCIe 3.0 x8 (low profile, x8 physical slot) (CPU 1)
• Slot 9: PCIe 3.0 x8 (low profile, x8 physical slot) (CPU 1)
• Slot 10: PCIe 3.0 x8 (low profile, x8 physical slot) (CPU 1)
• Slot 11: PCIe 3.0 x16 (low profile) (CPU 1)

The locations of the slots are shown in the following figure.

Figure 13. SR850 slots

Note: Slot 6 is an internal slot for the M.2 adapter as described in the M.2 drives section.

Slots 3-5 are implemented using a riser card, and the SR850 supports three different riser cards as listed in the following table.

The following table lists the ordering information for the riser cards.

The SR850 has integrated Intel Ethernet Connection X722 technology which can provide up to four 1/10GbE network ports via an optional LOM card. The X722 has the following features:

• Integrated into the Intel PCH chipset
• Supports 1GbE or 10GbE connections, depending on the selected LOM Phy adapter
• Offers VXLAN/NVGRE hardware offloads
• Supports VMDq and SR-IOV for advanced virtualization
• Supports iWarp RDMA

To provide connectivity to the X722, the SR850 supports six different LOM (LAN on Motherboard) cards which provide the Ethernet PHY function. Only 1 LOM card can be installed. See Figure 3 for the location of the LOM slot.

The LOM card supports NC-SI to allow the network connection to be shared between the operating system and the XClarity Controller (XCC) management module. The LOM also supports Wake-on-LAN (WOL).

For more information about the X722 controller, see the Lenovo Press product guide:
http://lenovopress.com/LP0654-intel-x722-integrated-controller

The following table lists the supported LOM cards.

The SR850 also supports an ML2 card provided a suitable ML2 riser card is installed (see the I/O expansion options section for details). The ML2 card supports NC-SI and WOL. The following table lists the supported ML2 adapters.

* ThinkSystem servers do not support Features on Demand, so the Emulex VFA5.2 ML2 Dual Port 10GbE SFP+ Adapter, 00AG560, cannot be upgraded to FCoE support. If you need FCoE or iSCSI support use 01CV770 instead.

The following table lists additional supported network adapters that can be installed in the regular PCIe slots.

* ThinkSystem servers do not support Features on Demand, so the Emulex VFA5.2 2x10 GbE SFP+ PCIe Adapter, 00AG570, cannot be upgraded to FCoE support. If you need FCoE or iSCSI support use 00AG580 instead.
† Support for the X710-DA2 and XXV710-DA2 adapters is limited to 5 adapters. See Support Tip HT508158 for details.

For more information, including the transceivers and cables that each adapter supports, see the list of Lenovo Press Product Guides in the Networking adapters category:
https://lenovopress.com/servers/options/ethernet

The following table lists the Fibre Channel HBAs supported by SR850 server.

For more information, see the list of Lenovo Press Product Guides in the Host bus adapters category:
https://lenovopress.com/servers/options/hba

The following table lists SAS HBAs and RAID adapters supported by SR850 server for use with external storage.

For more information, see the list of Lenovo Press Product Guides in the Host bus adapters and RAID adapters categories:
https://lenovopress.com/servers/options/hba
https://lenovopress.com/servers/options/raid

The following table compares the specifications of the external SAS HBAs and RAID adapters.

* SAS HBAs support SEDs (self-encrypting drives) by using software on the server and simply passing SED commands through the HBA to the drives. SED support by RAID controllers is provided using the built-in MegaRAID SafeStore functionality of the adapter.

The server supports the PCIe Flash Storage adapters listed in the following table.

For details about these adapters, see the Lenovo Press product guides in the Flash Adapters category:
https://lenovopress.com/servers/options/ssdadapter

The SR850 does not support any graphics processing units (GPUs).

The server has six 60 mm hot-swap fans and all six fans are standard in all models. The server offers N+1 redundancy, meaning that one fan can fail and the server still operates normally.

Either 16K RPM fans or 19K RPM fans are used in the server, depending on the components used in the server.

The 16K fan is the default selection, however the 19K fan is automatically selected when one of the following processors with high thermal characteristics is selected:

• Intel Xeon Gold 6126T 12C 125W 2.6GHz Processor
• Intel Xeon Gold 6144 8C 150W 3.5GHz Processor
• Intel Xeon Gold 6146 12C 165W 3.2GHz Processor
• Intel Xeon Gold 6154 18C 200W 3.0GHz Processor
• Intel Xeon Platinum 8160T 24C 150W 2.1GHz Processor
• Intel Xeon Platinum 8168 24C 205W 2.7GHz Processor
• Intel Xeon Platinum 8180 28C 205W 2.5GHz Processor
• Intel Xeon Platinum 8180M 28C 205W 2.5GHz Processor

For existing customers with the original 16K fans wish to operate the server without restrictions, the 19K RPM fans can be installed as field upgrades using part number 4F17A60142. The part number contains 1 fan. A total of 6 fans will need to be ordered.

The server supports up to two redundant hot-swap power supplies.

Installing a second power supply requires either the Processor and Memory Expansion Tray (7B27A03953) or the power interposer (feature AUPZ).

The power interposer enables redundant power support when the Processor and Memory Expansion Tray is not installed. If you do not have the Processor and Memory Expansion Tray installed and want to install two power supplies, then the power interposer card must be installed.

* Configure-to-order only
** Only needed if two power supplies are installed but the Processor and Memory Expansion Tray is not installed
† Support for 240 DC is planned

750W and 1100W power supplies are auto-sensing and support both 110V AC (100-127V 50/60 Hz) and 220V AC (200-240V 50/60 Hz) power. The 1600 W power supply only supports 220V AC power.

For China customers, all three power supplies are 240V DC ready; support is planned for a future date.

Note: At 110 V, the 1100W power supply generates 1050W of power.

Power supply options do not include a line cord.

For server configurations, the inclusion of a power cord is model dependent. Configure-to-order models can be configured without a power cord if desired.

The server supports booting from an operating system or hypervisor installed on an M.2 solid-state drive. See the M.2 drives section for details and the list of available options.

You can download supported VMware vSphere hypervisor images from the following web page and load it on the M.2 drive using the instructions provided:
https://vmware.lenovo.com/content/custom_iso/

The server contains an integrated service processor, XClarity Controller (XCC), which provides advanced control, monitoring, and alerting functions. The XCC is based on the Pilot4 XE401 baseboard management controller (BMC) using a dual-core ARM Cortex A9 service processor.

As an alternative to the front operator panel, (certain models or configure-to-order; not available as a field upgrade), the server supports a pull-out LCD display panel. The LCD display panel allows quick access to system status, firmware, network, and health information. The following figure shows the front operator panel with LCD display.

Figure 15. Front operator panel with LCD display

The LCD display and the function buttons give you access to the following information:

• Error messages
• System VPD: machine type & mode, serial number, UUID string
• System firmware levels: UEFI and XCC firmware
• XCC network information: hostname, MAC address, IP address, DNS addresses
• Environmental data: Ambient temperature, CPU temperature, AC input voltage, estimated power consumption
• System reset action

The front operator panel with LCD display can be ordered as listed in the following table.

* Only available configure-to-order or with predefined models

The server offers light path diagnostics. If an environmental condition exceeds a threshold or if a system component fails, the XCC lights LEDs inside the server to help you diagnose the problem and find the failing part. The SR850 has fault LEDs next to the following components:

• Each processor
• Each memory DIMM
• Each drive bay
• Each system fan
• Each power supply

The front of the server also houses an information pull-out tab (also known as the network access tag). See Figure 2 for the location. A label on the tab shows the network information (MAC address and other data) to remotely access XClarity Controller.

The steps to connect the mobile device are as follows:

1. Enable USB Management on the server, by holding down the ID button for 3 seconds (or pressing the dedicated USB management button if one is present)
2. Connect the mobile device via a USB cable to the server's USB port with the management symbol
3. In iOS or Android settings, enable Personal Hotspot or USB Tethering
4. Launch the Lenovo XClarity Mobile app

Remote management

The server offers a dedicated RJ45 port at the rear of the server for remote management via the XClarity Controller management processor. The port supports 10/100/1000 Mbps speeds.

Remote server management is provided through industry-standard interfaces:

• Intelligent Platform Management Interface (IPMI) Version 2.0
• Simple Network Management Protocol (SNMP) Version 3 (no SET commands; no SMNP v1)
• Common Information Model (CIM-XML)
• Representational State Transfer (REST) support
• Redfish support (DMTF compliant)
• Web browser - HTML 5-based browser interface (Java and ActiveX not required) using a responsive design (content optimized for the device being used - laptop, tablet, phone) with NLS support

IPMI via the Ethernet port (IPMI over LAN) is supported, however it is disabled by default. For CTO orders you can specify whether you want to the feature enabled or disabled in the factory, using the feature codes listed in the following table.

A virtual presence (remote control) capability also comes standard in the server for remote server management. Virtual media (remote drive images) support is optional via a software license upgrade.

The remote control functions include the following:

• Remotely viewing video with graphics resolutions up to 1600x1200 at 75 Hz with up to 23 bits per pixel, regardless of the system state
• Remotely accessing the server using the keyboard and mouse from a remote client
• Capturing blue-screen errors
• International keyboard mapping support
• LDAP-based authentication
• With the XCC Enterprise license upgrade, mapping ISO and diskette IMG image files as virtual drives that are available for use by the server

The Enterprise license upgrade, shown in the following table, enables the following features:

• Boot Capture
• Remote mounting of ISO and IMG files
• Virtual console collaboration - Ability for up to 6 remote users to be log into the remote session simultaneously
• Power capping
• License for XClarity Energy Manager

Because Lenovo XClarity Administrator does not require any agent software to be installed on the managed endpoints, there are no CPU cycles spent on agent execution, and no memory is used, which means that up to 1GB of RAM and 1 - 2% CPU usage is saved, compared to a typical managed system where an agent is required.

Lenovo XClarity Administrator is an optional software component for the SR850. The software can be downloaded and used at no charge to discover and monitor the SR850 and to manage firmware upgrades.

If software support is required for Lenovo XClarity Administrator, or premium features such as configuration management and operating system deployment are required, Lenovo XClarity Pro software subscription should be ordered. Lenovo XClarity Pro is licensed on a per managed system basis, that is, each managed Lenovo system requires a license.

The following table lists the Lenovo XClarity software license options.

For more information, refer to the Lenovo XClarity Administrator Product Guide:
http://lenovopress.com/tips1200

For more information about all the available Lenovo XClarity Integrators, see the Lenovo XClarity Administrator Product Guide: https://lenovopress.com/tips1200-lenovo-xclarity-administrator

LXEM is a licensed product. A single-node LXEM license is included with the XClarity Controller Enterprise upgrade as described in the Remote Management section. If your server does not have the XCC Enterprise upgrade, Energy Manager licenses can be ordered as shown in the following table.

The server offers the following security features:

• Administrator and power-on password
• Trusted Platform Module (TPM) supporting both TPM 1.2 and TPM 2.0
• Optional Trusted Cryptographic Module (TCM) or Nationz TPM 2.0, available only in China
• Lockable top cover to help prevent access to internal components
• Optional lockable front security bezel
• Self-encrypting drives with support for IBM Security Key Lifecycle Manager

The TCM and Nationz TPM modules, available only for China customers, are installed in a dedicated socket on the system board, as shown in Figure 4.

The optional lockable front bezel is shown in the following figure and includes a key that enables you to secure the bezel over the drives and system controls thereby reducing the chance of unauthorized or accidental access to the server.

Figure 16. Lockable front security bezel

The dimensions of the security bezel are:

• Width: 437 mm (17.2 in.)
• Height: 87 mm (3.4 in.)
• Width: 23 mm (0.9 in.)

The following table lists the security options for the server.

* Not available as a field upgrade. The component is CTO on pre-configured models only.

For SED drives and IBM Security Key Lifecycle Manager support see the SED encryption key management with ISKLM section.

The following table lists the rack installation options that are available for the server.

The Front VGA Connector Upgrade Kit allows you to upgrade your server by adding a VGA video port to the front of the server (if the server does not already come with a front VGA port). When the front VGA is in use, the rear VGA port is automatically disabled.

* This kit is for field upgrades only; for CTO use the rail kit with CMA, feature AXCH

The following table summarizes the rail kit features and specifications.

* For 0U PDU support, the rack must be at least 1100 mm (43.31 in.) deep without a CMA, or at least 1200 mm (47.24 in.) deep if a CMA is used.
** For 0U PDU support with the friction rail kit, the rack must be at least 1000 mm (39.37 in.) deep.
*** Measured when mounted on the rack, from the front surface of the front mounting flange to the rear most point of the rail.

The server supports the following operating systems:

• Microsoft Windows Server 2012 R2
• Microsoft Windows Server 2016
• Microsoft Windows Server 2019
• Microsoft Windows Server 2022
• Microsoft Windows Server, version 1709
• Microsoft Windows Server, version 1803
• Red Hat Enterprise Linux 6.9 x64
• Red Hat Enterprise Linux 6.10 x64
• Red Hat Enterprise Linux 7.3
• Red Hat Enterprise Linux 7.4
• Red Hat Enterprise Linux 7.5
• Red Hat Enterprise Linux 7.6
• Red Hat Enterprise Linux 7.7
• Red Hat Enterprise Linux 7.8
• Red Hat Enterprise Linux 7.9
• Red Hat Enterprise Linux 8.0
• Red Hat Enterprise Linux 8.1
• Red Hat Enterprise Linux 8.2
• Red Hat Enterprise Linux 8.3
• Red Hat Enterprise Linux 8.4
• Red Hat Enterprise Linux 8.5
• Red Hat Enterprise Linux 8.6
• Red Hat Enterprise Linux 8.7
• Red Hat Enterprise Linux 8.8
• Red Hat Enterprise Linux 9.0
• Red Hat Enterprise Linux 9.1
• Red Hat Enterprise Linux 9.2
• SUSE Linux Enterprise Server 11 Xen x64 SP4
• SUSE Linux Enterprise Server 11 x64 SP4
• SUSE Linux Enterprise Server 12 SP2
• SUSE Linux Enterprise Server 12 SP3
• SUSE Linux Enterprise Server 12 SP4
• SUSE Linux Enterprise Server 12 SP5
• SUSE Linux Enterprise Server 12 Xen SP2
• SUSE Linux Enterprise Server 12 Xen SP3
• SUSE Linux Enterprise Server 12 Xen SP4
• SUSE Linux Enterprise Server 12 Xen SP5
• SUSE Linux Enterprise Server 15
• SUSE Linux Enterprise Server 15 SP1
• SUSE Linux Enterprise Server 15 SP2
• SUSE Linux Enterprise Server 15 SP3
• SUSE Linux Enterprise Server 15 SP4
• SUSE Linux Enterprise Server 15 SP5
• SUSE Linux Enterprise Server 15 Xen
• SUSE Linux Enterprise Server 15 Xen SP1
• SUSE Linux Enterprise Server 15 Xen SP2
• SUSE Linux Enterprise Server 15 Xen SP3
• SUSE Linux Enterprise Server 15 Xen SP4
• SUSE Linux Enterprise Server 15 Xen SP5
• Ubuntu 22.04 LTS 64-bit
• VMware ESXi 6.0 U3
• VMware ESXi 6.5
• VMware ESXi 6.5 U1
• VMware ESXi 6.5 U2
• VMware ESXi 6.5 U3
• VMware ESXi 6.7
• VMware ESXi 6.7 U1
• VMware ESXi 6.7 U2
• VMware ESXi 6.7 U3
• VMware ESXi 7.0
• VMware ESXi 7.0 U1
• VMware ESXi 7.0 U2
• VMware ESXi 7.0 U3
• VMware ESXi 8.0
• VMware ESXi 8.0 U1
• VMware ESXi 8.0 U2

For a complete list of supported, certified and tested operating systems, plus additional details and links to relevant web sites, see the Operating System Interoperability Guide: https://lenovopress.com/osig#servers=sr850-7x18-7x19

For configure-to-order configurations, the server can be preloaded with VMware ESXi installed on M.2 cards. Ordering information is listed in the following table.

The SR850 has the following overall physical dimensions, excluding components that extend outside the standard chassis, such as EIA flanges, front security bezel (if any), and power supply handles:

• Width: 445 mm (17.5 inches)
• Height: 87 mm (3.4 inches)
• Depth: 765 mm (30.1 inches)

The following table lists the detailed dimensions. See the figure below for the definition of each dimension.

Figure 17. Server dimensions

Weight:

• Minimum 18 kg (40 lb.), fully configured 27 kg (59.6 lb.)

Electrical specifications:

• Electrical - Input voltage
  • 100 - 127 (nominal) V AC, 50 Hz or 60 Hz
  • 200 - 240 (nominal) V AC, 50 Hz or 60 Hz
  • 180 - 300 V DC (support is planned; China only)
• Power consumption:
  • 100-127 V:
    • 750W power supply: 8.4 kVA
    • 1100W power supply: 12 kVA
  • 200-240 V:
    • 750W power supply: 4.1 kVA
    • 1100W power supply: 6 kVA
    • 1600W power supply: 8.7 kVA

The ThinkSystem SR850 server complies with ASHRAE Class A2 specifications, and depending on the hardware configuration, also complies with ASHRAE Class A3 and Class A4 specifications. System performance may be impacted when operating temperature is outside ASHRAE A2 specification.

To comply with ASHRAE class A3 and class A4 specifications, the server models must meet the following hardware configuration requirements:

• Two power supplies installed
• NVMe drives not installed
• PCIe flash storage adapters not installed

CPU core speed may be reduced depending on the processor selected.

The server is supported in the following environment:

• Air temperature:
  • Operating:
    • ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); the maximum ambient temperature decreases by 1°C for every 300 m (984 ft) increase in altitude above 900 m (2,953 ft).
    • ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); the maximum ambient temperature decreases by 1°C for every 175 m (574 ft) increase in altitude above 900 m (2,953 ft).
    • ASHRAE Class A4: 5°C to 45°C (41°F to 113°F); the maximum ambient temperature decreases by 1°C for every 125 m (410 ft) increase in altitude above 900 m (2,953 ft).
  • Server off: 5°C to 45°C (41°F to 113°F)
  • Shipment/storage: -40°C to 60°C (-40°F to 140°F)
• Maximum altitude: 3,050 m (10,000 ft)
• Relative Humidity (non-condensing):
  • Operating
    • ASHRAE Class A2: 8% to 80%; maximum dew point: 21°C (70°F)
    • ASHRAE Class A3: 8% to 85%; maximum dew point: 24°C (75°F)
    • ASHRAE Class A4: 8% to 90%; maximum dew point: 24°C (75°F)
  • Shipment/storage: 8% to 90% 

The server generates the following heat and noise:

• Heat/thermal output:
  • Minimum configuration: 454 BTU/hr, 133 W
  • Maximum configuration: 5118 BTU/hr, 1500 W
• Noise level (LWAm)
  • Sound power, idling: 5.2 bels (minimum), 5.8 bels (typical), 6.4 bels (maximum)
  • Sound power, operating: 5.8 bels (minimum), 6.8 bels (typical), 7.0 bels (maximum)

The server has the following vibration and shock limits:

• Vibration:
  • Operating: 0.21 G rms at 5 Hz to 500 Hz for 15 minutes across 3 axes
  • Non-operating: 1.04 G rms at 2 Hz to 200 Hz for 15 minutes across 6 surfaces
• Shock:
  • Operating: 15 G for 3 milliseconds in each direction (positive and negative X, Y, and Z axes)
  • Non-operating:
    • 12 kg - 22 kg: 50 G for 152 in./sec velocity change across 6 surfaces
    • 23 kg  - 31 kg: 35 G for 152 in./sec velocity change across 6 surfaces

The SR850 has a 1-year or 3-year warranty based on the machine type of the system:

• 7X18: 1 year warranty
• 7X19: 3 year warranty

For more information, consult the brochure Lenovo Operational Support Services for Data Centers Services.

Lenovo Data Center Services empower you at every stage of your IT lifecycle. From expert advisory and strategic planning to seamless deployment and ongoing support, we ensure your infrastructure is built for success. Our comprehensive services accelerate time to value, minimize downtime, and free your IT staff to focus on driving innovation and business growth.

In this section:

• Lenovo Advisory Services
• Lenovo Plan & Design Services
• Lenovo Deployment, Migration, and Configuration Services
• Lenovo Support Services
• Lenovo Managed Services
• Lenovo Sustainability Services

Lenovo Deployment, Migration, and Configuration Services

Optimize your IT operations by shifting labor-intensive functions to Lenovo's skilled technicians for seamless on-site or remote deployment, configuration, and migration. Enjoy peace of mind, faster time to value, and comprehensive knowledge sharing with your IT staff, backed by our best-practice methodology.

• Deployment Services for Storage and ThinkAgile

  A comprehensive range of remote and onsite options tailored specifically for your business needs to ensure your storage and ThinkAgile hardware are fully operational from the start.

• Hardware Installation Services

  A full-range, comprehensive setup for your hardware, including unpacking, inspecting, and positioning components to ensure your equipment is operational and error-free for the most seamless and efficient installation experience, so you can quickly benefit from your investments.

• DM/DG File Migration Services

  Take the burden of file migration from your IT’s shoulders. Our experts will align your requirements and business objectives to the migration plans while coordinating with your team to plan and safely execute the data migration to your storage platforms.

• DM/DG/DE Health Check Services

  Our experts perform proactive checks of your Firmware and system health to ensure your machines are operating at peak and optimal efficiency to maximize up-time, avoid system failures, ensure the security of IT solutions and simplify maintenance.

• Factory Integrated Services

  A suite of value-added offerings provided during the manufacturing phase of a server or storage system that reduces time to value. These services aim at improving your hardware deployment experience and enhance the quality of a standard configuration before it arrives at your facility.

Lenovo Support Services

In addition to response time options for hardware parts, repairs, and labor, Lenovo offers a wide array of additional support services to ensure your business is positioned for success and longevity. Our goal is to reduce your capital outlays, mitigate your IT risks, and accelerate your time to productivity.

• Premier Support for Data Centers

  Your direct line to the solution that promises the best, most comprehensive level of support to help you fully unlock the potential of your data center.

• Premier Enhanced Storage Support (PESS)

  Gain all the benefits of Premier Support for Data Centers, adding dedicated storage specialists and resources to elevate your storage support experience to the next level.

• Committed Service Repair (CSR)

  Our commitment to ensuring the fastest, most seamless resolution times for mission-critical systems that require immediate attention to ensure minimal downtime and risk for your business. This service is only available for machines under the Premier 4-Hour Response SLA.

• Multivendor Support Services (MVS)

  Your single point of accountability for resolution support across vast range of leading Server, Storage, and Networking OEMs, allowing you to manage all your supported infrastructure devices seamlessly from a single source.

• Keep Your Drive (KYD)

  Protect sensitive data and maintain compliance with corporate retention and disposal policies to ensure your data is always under your control, regardless of the number of drives that are installed in your Lenovo server.

• Technical Account Manager (TAM)

  Your single point of contact to expedite service requests, provide status updates, and furnish reports to track incidents over time, ensuring smooth operations and optimized performance as your business grows.

• Enterprise Software Support (ESS)

  Gain comprehensive, single-source, and global support for a wide range of server operating systems and Microsoft server applications.

For more information, consult the brochure Lenovo Operational Support Services for Data Centers.

Lenovo Managed Services

Achieve peak efficiency, high security, and minimal disruption with Lenovo's always-on Managed Services. Our real-time monitoring, 24x7 incident response, and problem resolution ensure your infrastructure operates seamlessly. With quarterly health checks for ongoing optimization and innovation, Lenovo's remote active monitoring boosts end-user experience and productivity by keeping your data center's hardware performing at its best.

Lenovo Managed Services provides continuous 24x7 remote monitoring (plus 24x7 call center availability) and proactive management of your data center using state-of-the-art tools, systems, and practices by a team of highly skilled and experienced Lenovo services professionals.

Quarterly reviews check error logs, verify firmware & OS device driver levels, and software as needed. We’ll also maintain records of latest patches, critical updates, and firmware levels, to ensure you systems are providing business value through optimized performance.

Lenovo Sustainability Services

• Asset Recovery Services

  Lenovo Asset Recovery Services (ARS) provides a secure, seamless solution for managing end-of-life IT assets, ensuring data is safely sanitized while contributing to a more circular IT lifecycle. By maximizing the reuse or responsible recycling of devices, ARS helps businesses meet sustainability goals while recovering potential value from their retired equipment. For more information, see the Asset Recovery Services offering page.

• CO2 Offset Services

  Lenovo’s CO2 Offset Services offer a simple and transparent way for businesses to take tangible action on their IT footprint. By integrating CO2 offsets directly into device purchases, customers can easily support verified climate projects and track their contributions, making meaningful progress toward their sustainability goals without added complexity.

• Lenovo Certified Refurbished

  Lenovo Certified Refurbished offers a cost-effective way to support IT circularity without compromising on quality and performance. Each device undergoes rigorous testing and certification, ensuring reliable performance and extending its lifecycle. With Lenovo’s trusted certification, you gain peace of mind while making a more sustainable IT choice.

Lenovo TruScale XaaS is your set of flexible IT services that makes everything easier. Streamline IT procurement, simplify infrastructure and device management, and pay only for what you use – so your business is free to grow and go anywhere.

Lenovo TruScale is  the unified solution that gives you simplified access to:

• The industry’s broadest portfolio – from pocket to cloud – all delivered as a service
• A single-contract framework for full visibility and accountability
• The global scale to rapidly and securely build teams from anywhere
• Flexible fixed and metered pay-as-you-go models with minimal upfront cost
• The growth-driving combination of hardware, software, infrastructure, and solutions – all from one single provider with one point of accountability.

For information about Lenovo TruScale offerings that are available in your region, contact your local Lenovo sales representative or business partner.

The SR850 server conforms to the following standards:

• Energy Star v2.1
• FCC: Verified to comply with Part 15 of the FCC Rules, Class A
• Canada ICES-003, issue 6, Class A
• UL/IEC 60950-1
• CSA C22.2 No. 60950-1
• NOM-019
• Argentina IEC60950-1
• Japan VCCI, Class A
• Australia/New Zealand AS/NZS CISPR 32, Class A; AS/NZS 60950.1
• IEC 60950-1 (CB Certificate and CB Test Report)
• China CCC (GB4943.1), GB9254 Class A, GB17625.1
• Taiwan BSMI CNS13438, Class A; CNS14336-1
• Korea KN32, Class A; KN35
• Russia, Belorussia and Kazakhstan, EAC: TP TC 004/2011(for Safety); TP TC 020/2011(for EMC)
• CE Mark (EN55032 Class A, EN60950-1, EN55024, EN61000-3-2, and EN61000-3-3)
• CISPR 32, Class A
• TUV-GS (EN60950-1 /IEC60950-1, EK1-ITB2000)
• India BIS certification

The server supports attachment to external drive enclosures using a RAID controller with external ports or a SAS host bus adapter. Adapters supported by the server are listed in the SAS adapters for external storage section.

Note: Information provided in this section is for ordering reference purposes only. For the operating system and adapter support details, refer to the interoperability matrix for a particular storage enclosure that can be found on the Lenovo Data Center Support web site:
http://datacentersupport.lenovo.com

Lenovo offers the ThinkSystem DE Series and ThinkSystem DM Series external storage systems for high-performance storage. See the DE Series and DM Series product guides for specific controller models, expansion enclosures and configuration options:

• ThinkSystem DE Series Storage
  https://lenovopress.com/storage/thinksystem/de-series#rt=product-guide
• ThinkSystem DM Series Storage
  https://lenovopress.com/storage/thinksystem/dm-series#rt=product-guide
• ThinkSystem DG Series Storage
  https://lenovopress.com/storage/thinksystem/dg-series#rt=product-guide

The server supports both USB-attached RDX backup units and SAS-attached tape drives.

The following table lists the available external SAS tape backup options.

Tip: Verify the end-to-end support of an IBM tape backup solution through the IBM System Storage Interoperation Center (SSIC): http://www.ibm.com/systems/support/storage/ssic

For more information, see the list of Product Guides in the Backup units category:
https://lenovopress.com/servers/options/backup

The following table lists the external RDX backup options available.

For more information, see the Lenovo RDX USB 3.0 Disk Backup Solution product guide:
https://lenovopress.com/tips0894-rdx-usb-30

Lenovo offers the ThinkSystem DB Series of Fibre Channel SAN switches for high-performance storage expansion. See the DB Series product guides for models and configuration options:

• ThinkSystem DB Series SAN Switches:
  https://lenovopress.com/storage/switches/rack#rt=product-guide

The following table lists the uninterruptible power supply (UPS) units that are offered by Lenovo.

For more information, see the list of Product Guides in the UPS category:
https://lenovopress.com/servers/options/ups

The following table lists the power distribution units (PDUs) that are offered by Lenovo.