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Lenovo ThinkSystem SN850

End of saleServersblade
Lenovo ThinkSystem SN850blade4 × SFF 2.5" bays

The Lenovo ThinkSystem SN850 is a full-wide 4-socket blade server engineered for high-density virtualization, large databases, and in-memory analytics. Operating in the Flex System Enterprise Chassis, it combines four Intel Xeon Scalable processors with 48 DDR4 DIMM slots and four I/O mezzanine fabric connectors in a compact modular blade form factor.

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Specifications

BrandLenovo
FamilyThinkSystem SN
Form factorblade
ReleasedJul 2017
End of saleDec 2022
End of supportDec 2027
ProcessorUp to 4x 1st or 2nd Gen Intel Xeon Scalable processors up to 28 cores each (up to 165W TDP)
Memory48x DDR4 DIMM slots (12 per CPU) supporting up to 6TB DDR4-2933 ECC RDIMM/LRDIMM
Drive baysUp to 4x 2.5-inch SAS/SATA/NVMe hot-swap SSDs plus dual internal M.2 boot modules
Expansion slots4x PCIe 3.0 x16 I/O mezzanine connectors routing to all four chassis fabric switches
NetworkSupports high-density multi-port 10GbE, 25GbE, and 16Gb Fibre Channel mezzanine adapters
Power supplyShared power delivered through the Flex System Enterprise Chassis backplane
ManagementLenovo XClarity Controller (XCC)

Compatible parts

Memory

Hard drives

Works together

How the Lenovo ThinkSystem SN850 connects to servers, storage and the network: 4 ways, with the parts and products on each path.

Fibre Channel SANiSCSI and NVMe/TCP over EthernetDirect-attached SASFile storage (NFS and SMB)

Fibre Channel SAN

Match the speed: 16Gb and 32Gb FC HBAs, switches and array ports work together, and each generation also runs one or two speeds below its own (a 32Gb port runs at 16Gb and 8Gb).

Adapters for the server (check the fit list)

Switches

Storage

Optics

Fibre Channel SAN: how it fits together

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server (check the fit list)

Switches

Storage

Optics

iSCSI and NVMe/TCP over Ethernet: how it fits together

Direct-attached SAS

12Gb SAS uses Mini-SAS HD (SFF-8644) connectors; older 6Gb gear uses Mini-SAS (SFF-8088). Adapter cables exist, but the link runs at the slower speed.

Adapters for the server (check the fit list)

Storage

Direct-attached SAS: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Adapters for the server (check the fit list)

Switches

Storage

Optics

File storage (NFS and SMB): how it fits together

Plan and size it

Check compatibility with Lenovo

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Lenovo has tested with the Lenovo ThinkSystem SN850.

Equivalent models from other brands

FAQ

How many SN850 4-socket blades fit into a Flex System chassis?

A 10U Flex System Enterprise Chassis accommodates up to seven full-wide SN850 compute nodes.

How many memory slots are available on the SN850?

It provides 48 DDR4 DIMM sockets supporting up to 6TB of total system memory.

Buying or selling ThinkSystem SN850?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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Sources