Lenovo Distributed Storage Solution for IBM Spectrum Scale (DSS-G) (System x based)

Lenovo Distributed Storage Solution for IBM Spectrum Scale (DSS-G) is a software-defined storage (SDS) solution for dense scalable file and object storage suitable for high-performance and data-intensive environments. Enterprises or organizations running HPC, Big Data or cloud workloads will benefit the most from the DSS-G implementation.

DSS-G combines the performance of the Lenovo x3650 M5 servers, Lenovo D1224 and D3284 storage enclosures, and industry leading IBM Spectrum Scale software to offer a high performance, scalable building block approach to modern storage needs.

Lenovo DSS-G is delivered as a pre-integrated, easy-to-deploy rack-level solution that dramatically reduces time-to-value and total cost of ownership (TCO). All DSS-G base offerings, except for the DSS-G100, are built on Lenovo System x3650 M5 servers with Intel Xeon E5-2600 v4 series processors, Lenovo Storage D1224 Drive Enclosures with high-performance 2.5-inch SAS solid-state drives, and Lenovo Storage D3284 High-Density Drive Enclosures with large capacity 3.5-inch NL SAS HDDs. The DSS-G100 base offering uses the ThinkSystem SR650 as the server with up to eight NVMe drives and no storage enclosures.

Combined with IBM Spectrum Scale (formerly IBM General Parallel File System, GPFS), an industry leader in high-performance clustered file system, you have an ideal solution for the ultimate file and object storage solution for HPC and BigData.

The DSS-G solution gives you the choice of shipping fully integrated into the Lenovo 1410 rack cabinet, or with the Lenovo Client Site Integration Kit, 7X74, which allows you to have Lenovo install the solution in a rack of your own choosing. In either case, the solution is tested, configured, and ready to be plugged in and turned on; it is designed to integrate into an existing infrastructure effortlessly, to dramatically accelerate time to value and reduce infrastructure maintenance costs.

Lenovo DSS-G is licensed by the number of drives installed, rather than the number of processor cores or the number of connected clients, so there are no added licenses for other servers or clients that mount and work with the file system.

Lenovo provides a single point of entry for supporting the entire DSS-G solution, including the IBM Spectrum Scale software, for quicker problem determination and minimized downtime.

Lenovo DSS-G is fulfilled through Lenovo Scalable Infrastructure (LeSI), which offers a flexible framework for the development, configuration, build, delivery and support of engineered and integrated data center solutions. Lenovo thoroughly tests and optimizes all LeSI components for reliability, interoperability and maximum performance, so clients can quickly deploy the system and get to work achieving their business goals.

The major hardware components of a DSS-G solution are:

• All DSS-G base models except DSS-G100:
  • Two Lenovo System x3650 M5 servers
  • Choice of direct-attach storage enclosures - either D1224 or D3284 enclosures
    • 1, 2, 4, or 6 Lenovo Storage D1224 Drive Enclosures each holding 24x 2.5-inch HDDs or SSDs
    • 2, 4, or 6 Lenovo Storage D3284 External High Density Drive Expansion Enclosure, each holding 84x 3.5-inch HDDs
• DSS-G base model G100:
  • One Lenovo ThinkSystem SR650
  • A minimum of 4 and a maximum of 8x 2.5-inch NVMe drives
  • Red Hat Enterprise Linux
  • IBM Spectrum Scale for DSS Standard Edition for Flash or Data Management Edition for Flash
• Installed and cabled in the factory in a 42U rack cabinet, or shipped with the Client Site Integration Kit that provides Lenovo installation into the customer’s choice of rack
• Optional management node and management network, for example an x3550 M5 server and RackSwitch G7028 Gigabit Ethernet switch

Lenovo x3650 M5 servers

Figure 2. Lenovo System x3650 M5 (servers used in DSS-G solution only have two internal drives, for use as boot drives)

Lenovo System x3650 M5 servers have the following key features:

• Superior system performance with two Intel Xeon E5-2690 v4 processors, each with 14 cores, 35 MB cache and a core frequency of 2.6 GHz
• DSS-G configurations of 128 GB, 256 GB, or 512 GB memory using TruDDR4 RDIMMs operating at 2400 MHz
• Special High Performance I/O (HPIO) system board and riser cards to maximize bandwidth to the high-speed network adapters, with two PCIe 3.0 x16 slots and five PCIe 3.0 x8 slots.
• Choice of high-speed network connectivity: 100 GbE, 40 GbE, 10 GbE, FDR or EDR InfiniBand or 100 Gb Omni-Path Architecture (OPA).
• Connections to the D1224 or D3284 storage enclosures using 12Gb SAS host bus adapters (HBAs), with two SAS connections to every storage enclosure, forming a redundant pair.
• Integrated Management Module II (IMM2.1) service processor to monitor server availability and perform remote management.
• An integrated industry-standard Unified Extensible Firmware Interface (UEFI) enables improved setup, configuration, and updates, and simplifies error handling.
• Integrated Management Module with Advanced Upgrade to enable the remote presence and blue-screen capture features
• Integrated Trusted Platform Module (TPM) enables advanced cryptographic functionality such as digital signatures and remote attestation.
• High-efficiency power supplies with 80 PLUS Platinum and Energy Star 2.0 certifications.

For more information about the x3650 M5 server, see the Lenovo Press product guide:
https://lenovopress.com/lp0068

Lenovo Storage D1224 Drive Enclosures

Figure 3. Lenovo Storage D1224 Drive Enclosure

Lenovo Storage D1224 Drive Enclosures have the following key features:

• 2U rack mount enclosure with 12 Gbps SAS direct-attached storage connectivity, designed to provide simplicity, speed, scalability, security, and high availability
• Holds 24x 2.5-inch small form factor (SFF) drives
• Dual Environmental Service Module (ESM) configurations for high availability and performance
• Flexibility in storing data on high performance SAS SSDs, performance-optimized enterprise SAS HDDs, or capacity-optimized enterprise NL SAS HDDs; mixing and matching drive types and form factors on a single RAID adapter or HBA to perfectly meet performance and capacity requirements for various workloads
• Support multiple host attachments and SAS zoning for storage partitioning

For more information about the Lenovo Storage D1224 Drive Enclosure, see the Lenovo Press product guide: https://lenovopress.com/lp0512

The following figure show the D3284 drive expansion enclosure with the lower drawer open.

Figure 5. Front view of the D3284 drive enclosure

For more information about the Lenovo Storage Drive Expansion Enclosure, see the Lenovo Press product guide: https://lenovopress.com/lp0513

Infrastructure and rack installation

The solution arrives at the customer location installed in the Lenovo 1410 Rack, tested, components and cables labeled and ready to deploy for quick productivity.

• Factory-integrated, pre-configured ready-to-go solution that is delivered in a rack with all the hardware you need for your workloads: servers, storage, and network switches, plus essential software tools.
• IBM Spectrum Scale software is preinstalled on all servers.
• Optional x3550 M5 server and RackSwitch G7028 Gigabit Ethernet switch for xCAT cluster administration software and to act as the Spectrum Scale quorum.
• Designed for effortless integration into existing infrastructures, thereby reducing deployment time and saving money.
• Lenovo deployment services are available with the solution help get customers up and running quickly by allowing to begin deploying workloads in hours — not weeks — and realize substantial savings.
• Available Lenovo RackSwitch switches for a management network deliver exceptional performance and low latency, along with cost savings, and are designed to perform seamlessly with other vendors' upstream switches.
• All the components of the solution are available through Lenovo, which provides a single point of entry for all support issues that you might encounter with the server, networking, storage, and software used in the solution, for quicker problem determination and minimized downtime.

Lenovo ThinkSystem SR650 servers

Figure 6. Lenovo ThinkSystem SR650 servers

Lenovo System SR650 servers have the following key features needed for the DSS-G100 base configuration:

• The SR650 server features a unique AnyBay design that allows a choice of drive interface types in the same drive bay: SAS drives, SATA drives, or U.2 NVMe PCIe drives.
• The SR650 server offers onboard NVMe PCIe ports that allow direct connections to the U.2 NVMe PCIe SSDs, which frees up I/O slots and helps lower NVMe solution acquisition costs.  DSS-G100 utilizes the NVMe drives
• The SR650 server delivers impressive compute power per watt, featuring 80 PLUS Titanium and Platinum redundant power supplies that can deliver 96% (Titanium) or 94% (Platinum) efficiency at 50% load when     connected to a 200 - 240 V AC power source.
• The SR650 server is designed to meet ASHRAE A4 standards (up to 45 °C or 113 °F) in select configurations, which enable customers to lower energy costs, while still maintaining world-class reliability.
• The SR650 server offers numerous features to boost performance, improve scalability, and reduce costs:
• Improves productivity by offering superior system performance with the Intel Xeon Processor Scalable Family with up to 28-core processors, up to 38.5 MB of last level cache (LLC), up to 2666 MHz memory speeds, and up to 10.4 GT/s Ultra Path Interconnect (UPI) links.
• Support for up to two processors, 56 cores, and 112 threads allows to maximize the concurrent execution of multithreaded applications.
• Intelligent and adaptive system performance with energy efficient Intel Turbo Boost 2.0 Technology 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 utilize the hardware for virtualization workloads.
• Intel Advanced Vector Extensions 512 (AVX-512) enable acceleration of enterprise-class and high performance computing (HPC) workloads.
• Helps maximize system performance for data intensive applications with up to 2666 MHz memory speeds and up to 1.5 TB of memory capacity (support for up to 3 TB is planned for the future).
• Offers flexible and scalable internal storage in a 2U rack form factor with up to 24x 2.5-inch drives for performance-optimized configurations or up to 14x 3.5-inch drives for capacity-optimized configurations, providing a wide selection of SAS/SATA HDD/SSD and PCIe NVMe SSD types and capacities.
• Provides flexibility to use SAS, SATA, or NVMe PCIe drives in the same drive bays with a unique AnyBay design.
• Provides I/O scalability with the LOM slot, PCIe 3.0 slot for an internal storage controller, and up to six PCI Express (PCIe) 3.0 I/O expansion slots in a 2U rack form factor.
• Reduces I/O latency and increases overall system performance with Intel Integrated I/O Technology that embeds the PCI Express 3.0 controller into the Intel Xeon Processor Scalable Family.

IBM Spectrum Scale, the follow-on to IBM GPFS, is a high-performance solution for managing data at scale with the distinctive ability to perform archive and analytics in place.

IBM Spectrum Scale has the following features:

• Uses Declustered RAID, where data and parity information as well as Spare Capacity is distributed across all disks
• Rebuilds with Declustered RAID are faster:
  • Traditional RAID would have one LUN fully busy resulting in slow rebuild and high impact overall
  • Declustered RAID rebuild activity spreads the load across many disks resulting in faster rebuild and less disruption to user programs
  • Declustered RAID minimizes critical data exposed to data loss in case of a second failure.
• 2-fault / 3-fault tolerance and mirroring: 2- or 3-fault-tolerant Reed-Solomon parity encoding as well as 3- or 4-way mirroring provides data integrity, reliability and flexibility
• End-to-end checksum:
  • Helps detect and correct off-track I/O and dropped writes
  • Disk surface to GPFS user/client provides information to help detect and correct write or I/O errors
• Disk hospital - asynchronous, global error diagnosis:
  • If there is a media error, information provided helps in verifying and restoring a media error.
  • If there is a path problem, information can be used to attempt alternate paths.
  • Disk tracking information helps track disk service times, which is useful in finding slow disks so they can be replaced.
• Multipathing: Performed automatically by Spectrum Scale, so no multipath driver is needed.
• Supports a variety of file I/O protocols:
  • POSIX, GPFS, NFS v4.0, SMB v3.0
  • Big data and analytics: Hadoop MapReduce
  • Cloud: OpenStack Cinder (block), OpenStack Swift (object), S3 (object)
• Supports cloud object storage:
  • IBM Cloud Storage System (Cleversafe)
  • Amazon S3
  • IBM SoftLayer Native Object
  • OpenStack Swift
  • Amazon S3 compatible providers

Lenovo DSS-G supports two editions of IBM Spectrum Scale, RAID Standard Edition and Data Management Edition. A comparison of these two editions is shown in the following table.

Information about licensing is in the IBM Spectrum Scale licensing section.

This section lists the system specifications of the components used in the Lenovo DSS-G offerings.

• x3650 M5 server specifications
• SR650 server specifications
• D1224 External Enclosure specifications
• D3284 External Enclosure specifications
• Rack cabinet specifications
• Optional management components

Lenovo DSS-G is available in the configurations listed in the following table. Each configuration is installed in a 42U rack, although multiple DSS-G configurations can share the same rack.

* Capacity is based on using 2TB 2.5-inch HDDs in all but 2 of the drive bays in the first drive enclosure; the remaining 2 bays must have 2x SSDs for Spectrum Scale internal use.
** Capacity is based on using 10TB 3.5-inch HDDs in all but 2 of the drive bays in the first drive enclosure; the remaining 2 bays must have 2x SSDs for Spectrum Scale internal use.

Configurations are built using the x-config configurator tool:
https://lesc.lenovo.com/products/hardware/configurator/worldwide/bhui/asit/index.html

The configuration process includes the following steps:

• Select the drive and drive enclosure, as listed in the previous table.
• Node configuration, as described in the next subsections:
  • Memory
  • Network adapter
  • Red Hat Enterprise Linux (RHEL) subscription
  • Enterprise Software Support (ESS) subscription
• xCAT management network selection
• IBM Spectrum Scale license selection
• Power distribution infrastructure selection
• Professional Services selection

The following sections provide information about these configuration steps.

All drives used in all the enclosures in a DSS-G configuration are identical. The only exception to this is a pair of 400 GB SSDs that are required in the first drive enclosure for any configuration using HDDs. These SSDs are for logtip use by the IBM Spectrum Scale software and are not for customer data.

The drive requirement are as follows:

• For configurations that use HDDs, two 400GB logtip SSDs must also be selected in the first drive enclosure in the DSS-G configuration.
• All subsequent enclosures in HDD-based DSS-G configuration do not require these logtip SSDs.
• Configurations using SSDs do not require the pair of logtip SSDs.
• Only one drive size & type is selectable per DSS-G configuration.
• All drive enclosures must be fully populated with drives. Partially filled enclosures are not supported.

The following table lists the drives available for selection in a D1224 enclosure.

The Lenovo DSS-G configurations (except for DSS-G100) use the x3650 M5 server, which features the Intel Xeon processor E5-2600 v4 product family.

See the Specifications section for details about the servers.

Memory

The DSS-G offerings allow three different memory configurations for the x3650 M5 servers

• 128 GB using 8x 16 GB TruDDR4 RDIMMs
• 256 GB using 16x 16 GB TruDDR4 RDIMMs
• 512 GB using 16x 32 GB TruDDR4 RDIMMs

Each of the two processor has four memory channels, with three DIMMs per channel:

• With 8 DIMMs installed, each memory channel has 1 DIMM installed, operating at 2400 MHz
• With 16 DIMMs installed, each memory channel has 2 DIMMs installed, operating at 2400 MHz

The following memory protection technologies are supported:

• ECC
• Chipkill

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

Internal storage

The x3650 M5 servers in the DSS-G have two internal hot-swap drives, configured as a RAID-1 pair and connected to a RAID controller with 1GB of flash-backed cache.

Network adapter

The x3650 M5 server has four integrated RJ-45 Gigabit Ethernet ports (BCM5719 chip), which can be used for management purposes. However, for data, the DSS-G configurations use one of the network adapters listed in the following table for cluster traffic.

For details about these adapters, see the following product guides:

• Mellanox ConnectX-3 Adapters, https://lenovopress.com/tips0897
• Mellanox ConnectX-4 Adapter, https://lenovopress.com/lp0098
• Intel Omni-Path Architecture 100 Series HFA, https://lenovopress.com/lp0550

The DSS-G configurations support two or three network adapters, in one of the combinations listed in the following table.

The transceivers and optical cables, or the DAC cables needed to connect the adapters to the customer-supplied network switches can be configured together with the system in x-config. Consult the product guides for the adapters for details.

The Lenovo DSS-G100 configuration uses the ThinkSystem SR650 server.

Memory

The G100 configuration has either 192 GB or 384 GB of system memory running at 2666 MHz:

• 192 GB: 12x 16 GB DIMMs (6 DIMMs per processor, 1 DIMM per memory channel)
• 384 GB: 24x 16 GB DIMMs (12 DIMMs per processor, 2 DIMMs per memory channel)

The table lists the ordering information.

Internal storage

The SR650 server in the G100 configuration has two internal hot-swap drives, configured as a RAID-1 pair and connected to a RAID 930-8i adapter with 2GB of flash-backed cache.

The following table lists the NVMe drives that are supported in the SR650 when used in the DSS-G100 configuration.

Network adapter

The SR650 server for the DSS-G100 configuration has the following Ethernet interfaces:

• Four 10 GbE ports with RJ-45 connectors (10GBaseT) via a LOM adapter (feature code AUKM)
• One 10/100/1000 Mb Ethernet systems management port with an RJ-45 connector

In addition, the following table lists the adapters that are available for use for cluster traffic.

For details about these adapters, see the following product guides:

• Mellanox ConnectX-4 Adapter, https://lenovopress.com/lp0098
• Intel Omni-Path Architecture 100 Series HFA, https://lenovopress.com/lp0550

The transceivers and optical cables, or the DAC cables needed to connect the adapters to the customer-supplied network switches can be configured together with the system in x-config. Consult the product guides for the adapters for details.

The Lenovo DSS-G offering connects as a storage block to the customer's Spectrum Scale cluster network using the high-speed network adapters installed in the servers. Each pair of servers has two or three network adapters, which are either Ethernet, InfiniBand or Omni-Fabric Architecture (OPA). Each DSS-G storage block connects to the cluster network.

In concert with the cluster network is the xCAT management network. In lieu of a customer-supplied management network, the Lenovo DSS-G offering includes an x3550 M5 server running xCAT and a RackSwitch G7028 24-port Gigabit Ethernet switch.

These components are shown in the following figure.

Figure 8. Lenovo DSS-G storage blocks in a Spectrum Scale client network

Power distribution units (PDUs) are used to distribute power from an uninterruptible power supply (UPS) or utility power to the equipment within the DSS-G rack cabinet and to provide fault-tolerant power redundancy for high availability.

Four PDUs are selected for each DSS-G configuration (except for the G201 configuration which uses two PDUs). The PDUs can be one of the PDUs listed in the following table.

* DSS G100 and G201 require only two PDUs

Each server, switch and drive enclosure has two redundant power supplies, and each of two power supplies is connected to a separate PDU to support topologies with redundant AC power sources.

Configuration notes:

• Only one type of PDUs is supported in the DSS-G rack cabinet; different PDU types cannot be mixed within the rack.
• Power cables lengths are derived based on the configuration selected.
• PDUs have detachable power cords (line cords) and are country dependent.

The following table summarizes the PDU specifications.

The line cords that are available for the PDUs are listed in the following table.

For more information about the PDUs, see the following Lenovo Press documents:

• Lenovo PDU Quick Reference Guide - North America
  https://lenovopress.com/redp5266
• Lenovo PDU Quick Reference Guide – International
  https://lenovopress.com/redp5267

The servers (including the x3550 M5 xCAT management servers, if selected) run Red Hat Enterprise Linux 7.2 which is preinstalled on the RAID-1 pair of 300 GB drives installed in the servers.

Each server requires a RHEL operating system subscription and a Lenovo Enterprise Software Support (ESS) subscription. The Red Hat subscription will provide 24x7 Level 3 support. The Lenovo ESS subscription provides Level 1 and Level 2 support, with 24x7 for Severity 1 situations.

Part numbers of services subscriptions vary by country. The x-config configurator will offer the part numbers available for your location.

IBM Spectrum Scale licensing part numbers are listed in the following table. Licenses for DSS-G are based on the number and type of drives in the configuration and are offered in differing periods of support.

The core offerings available are:

• For configurations with HDDs:
  • IBM Spectrum Scale for DSS Data Management Edition for Disk per Disk Drive
  • IBM Spectrum Scale for DSS Standard Edition for Disk Per Disk Drive

  Tip: The two mandatory SSDs needed for HDD configurations are not counted in the licensing.

• For configurations with SSDs:
  • IBM Spectrum Scale for DSS Data Management Edition for Flash per Disk Drive
  • IBM Spectrum Scale for DSS Standard Edition for Flash per Disk Drive

Each of these is offered in 1, 3, 4 and 5-year support periods.

The number of licenses needed is based on the total number of HDDs and SSDs in the drive enclosures (excluding the logtip SSDs) and will be derived by the x-config configurator. The total number of Spectrum Scale licenses needed will be split between the two DSS-G servers. Half will appear on one server and half will appear on the other server.

Three days of Lenovo Professional Services are included by default with the DSS-G solutions to get customers up and running quickly. This selection can be removed if so desired.

Services are tailored to the customer need and typically include:

• Conduct a preparation and planning call
• Configure xCAT on the x3550 M5 quorum/management server
• Verify, and update if needed, firmware and software versions to implement the DSS-G
• Configure the network settings specific to the customer environment for
  • Integrated Management Modules (IMM2) on the x3650 M5 and x3550 M5 servers
  • Red Hat Enterprise Linux on the x3650 M5, SR650 and x3550 M5 servers
• Configure IBM Spectrum Scale on the DSS-G servers
• Create file and exporting systems from the DSS-G storage
• Provide skills transfer to customer personnel
• Develop post-installation documentation describing the specifics of the firmware/software versions and network and file system configuration work that was done

The system has a three-year customer-replaceable unit (CRU) and onsite (for field-replaceable units (FRUs) only) limited warranty with standard call center support during normal business hours and 9x5 Next Business Day Parts Delivered.

Also available are Lenovo Services warranty maintenance upgrades and post-warranty maintenance agreements, with a predefined scope of services, including service hours, response time, term of service, and service agreement terms and conditions.

Lenovo warranty service upgrade offerings are region-specific. Not all warranty service upgrades are available in every region. For more information about Lenovo warranty service upgrade offerings that are available in your region, go to the Data Center Advisor and Configurator website http://dcsc.lenovo.com, then do the following:

1. In the Customize a Model box in the middle of the page, select the Services option in the Customization Option dropdown menu
2. Enter the machine type & model of the system
3. From the search results, you can click either Deployment Services or Support Services to view the offerings

The following table explains warranty service definitions in more detail.

The following Lenovo warranty service upgrades are available:

• Warranty and maintenance service upgrades:
  • Three, four, or five years of 9x5 or 24x7 service coverage
  • Parts delivered or technician installed parts from next business day to 4 or 2 hours
  • Committed repair service
  • Warranty extension of up to 5 years
  • Post warranty extensions
• Committed Repair Service

  Committed Repair Services enhances the level of Warranty Service Upgrade or Post Warranty/Maintenance Service offering associated with the selected systems. Offerings vary and are available in select countries.

  • Priority handling to meet defined time frames to restore the failing machine to good working condition
  • 24x7x6 committed repair: Service performed 24 hours per day, 7 days per week, within 6 hours
• YourDrive YourData

  Lenovo’s YourDrive YourData service is a multi-drive retention offering that ensures your data is always under your control, regardless of the number of drives that are installed in your Lenovo server. In the unlikely event of a drive failure, you retain possession of your drive while Lenovo replaces the failed drive part. Your data stays safely on your premises, in your hands. The YourDrive YourData service can be purchased in convenient bundles with Lenovo warranty upgrades and extensions.

• Microcode Support

  Keeping microcode current helps prevent hardware failures and security exposure. There are two levels of service: analysis of the installed base and analysis and update where required. Offerings vary by region and can be bundled with other warranty upgrades and extensions.

• Enterprise Software Support

  Lenovo Enterprise Server Software Support can help you troubleshoot your entire server software stack. Choose support for server operating systems from Microsoft, Red Hat, SUSE, and VMware; Microsoft server applications; or both operating systems and applications. Support staff can help answer troubleshooting and diagnostic questions, address product compatibility and interoperability issues, isolate causes of problems, report defects to software vendors, and more.

  In addition, you can access hardware “how to” support for System x servers. Staff can help resolve hardware problems not covered under warranty, refer you to the right documentation and publications, provide corrective service information for known defects, and transfer you to a hardware support call center if needed.

• Hardware Installation Services

  Lenovo experts can seamlessly manage the physical installation of your server, storage, or networking hardware. Working at a time convenient for you (business hours or off shift), the technician will unpack and inspect the systems on your site, install options, mount in a rack cabinet, connect to power and network, check and update firmware to the latest levels, verify operation, and dispose of the packaging, allowing your team to focus on other priorities. Your new systems will be configured and ready for your software installation.

Lenovo DSS-G is supported in the following environment:

• Air temperature: 5 °C - 40 °C (41 °F - 104 °F)
• Humidity: 10% to 85% (non-condensing)

For more information, see these resources:

• Lenovo DSS-G product page
  http://www3.lenovo.com/us/en/data-center/servers/high-density/Lenovo-Distributed-Storage-Solution-for-IBM-Spectrum-Scale/p/WMD00000275
• x-config configurator:
  https://lesc.lenovo.com/products/hardware/configurator/worldwide/bhui/asit/index.html
• Lenovo DSS-G datasheet:
  https://lenovopress.com/datasheet/ds0026-lenovo-distributed-storage-solution-for-ibm-spectrum-scale