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Key features
The ThinkServer sd350 dense offering fits four hot-pluggable sd350 servers into an n400 enclosure that
takes up only 2U (0.5U per server) and includes room for plenty of internal storage. The overall design
makes the solution extremely affordable, with a low total cost of ownership (TCO).
The n400 is a 2U enclosure that holds four servers at the back and 24x 2.5-inch hot-swap drives at the
front. Six drive bays are connected to each server; the drives are not shared between the servers. The rear
of the server houses the four sd350 servers and two power supplies. The power supplies provide power to
the servers and the drives.
Scalability and performance
The sd350 server and n400 enclosure offer numerous features to boost performance, improve scalability,
and reduce costs:
Up to four nodes in a single 2U enclosure, each with two of the latest Xeon v4 processors, 16
DIMMs, and three PCIe slots. It is a highly dense, scalable, and price-optimized offering.
The Intel Xeon processor E5-2600 v4 product family improves productivity by offering superior
system performance, with 20-core processors, core speeds up to 2.6 GHz, L3 cache sizes up to 50
MB, DDR4 memory speeds up to 2400 MHz, and QPI interconnect links of up to 9.6 GTps.
Two processors in each server, up to 40 cores total and 88 threads maximize the concurrent
execution of multithreaded applications. With four nodes in the n400 enclosure, a total of 160 cores
are available.
Intelligent and adaptive system performance with Intel Turbo Boost Technology 2.0 allows CPU
cores to run at maximum speeds during peak workloads by temporarily going beyond processor
thermal design power (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.
Intel Advanced Vector Extensions 2 (AVX2) improve floating-point performance for compute-
intensive technical and scientific applications.
Sixteen DIMMs of registered 2400 MHz DDR4 ECC memory provide speed, high availability, and a
memory capacity of up to 512 GB.
Each sd350 server supports up to six 2.5-inch hot-swap drives (which are installed in the
enclosure). The sd350 also supports a SATADOM (SATA Drive on Module) drive, which plugs
directly into SATA port 1
Supports HDDs up to 2 TB capacity and SSDs up to 3.84 TB. Therefore, each server can have up
to 23.0 TB of storage capacity using six drives. 64GB SATADOM drive supported.
The use of solid-state drives (SSDs) instead of, or along with, traditional hard disk drives (HDDs) can
improve I/O performance. An SSD can support up to 100 times more I/O read operations per
second (IOPS) than a typical HDD.
Three PCIe slots internal to the sd350: One PCIe 3.0 x16 low-profile slot, one PCIe 3.0 x8 slot for
an OCP form-factor adapter, and one PCIe 3.0 x8 mezzanine slot for a dedicated RAID adapter.
Supports adapters designed for the Open Compute Project (OCP) form factor. OCP delivers
efficient server, storage and data center hardware design for scalable computing. Hardware
designed for OCP openly shares custom data center designs to improve both cost and energy
efficiency across the industry.
PCI Express 3.0 I/O expansion capabilities improve the theoretical maximum bandwidth by 60%
compared with the previous generation of PCI Express 2.0.
Lenovo ThinkServer sd350
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