Flex System Enterprise Chassis

Flex System is the next generation of blade technology with more performance and bandwidth and far more capability to consolidate and virtualize than previous systems. Flex System is anchored by the Flex System Enterprise Chassis which enables high-speed performance with integrated servers and networking. Furthermore, its flexible design can meet the needs of varying workloads with independently scalable IT resource pools for higher utilization and lower cost per workload.

The Flex System Enterprise Chassis is shown in Figure 1.

Figure 1. The Flex System Enterprise Chassis

In addition to the Flex System Enterprise Chassis, Lenovo also offers the Carrier-Grade Chassis for installations requiring tolerance to higher temperatures or for use in environments without filtered air. For information about the Carrier-Grade Chassis, see https://lenovopress.com/tips1285.

The Flex System Enterprise Chassis is a simple, integrated infrastructure platform that supports a mix of compute, storage, and networking resources to meet the demands of your applications. The solution is easily scalable with the addition of another chassis with the required nodes. With Lenovo XClarity Administrator, multiple chassis can be monitored from a single screen. This flexible 14 node, 10U chassis is designed for a simple deployment now and to scale to meet your needs in the future.

Flexibility and efficiency

The 14 bays in the chassis allow the installation of compute or management nodes, with networking modules in the rear. A single chassis or a group of chassis can be fully customized to the specific needs of the computing environment. IT can meet the needs of the business using a single system across multiple operating environments.

The system monitors and manages power usage on all major chassis components so you have total control over power consumption. AC power options can be configurable in either a single or three-phase power domain. The chassis supports N+N or N+1 redundant power supplies and an entirely passive mid-plane to meet your reliability needs. The power supplies are 80 PLUS Platinum-certified indicating high energy efficiency. The chassis design also optimizes cooling with cooling zones within the chassis. The system manages the fan modules based on node configuration within the chassis. So, the system can increase the speed of certain fan modules to cool potential hot spots, and use lower speeds for other fan modules where appropriate.

Easily scalable with simple administration

Because the Flex System Enterprise Chassis is an all-in-one solution, it is designed for growth from a single chassis to many. Adding compute, or networking capability is as simple as adding additional nodes or modules. Compute nodes and I/O modules connect to a midplane and are designed to be inserted or removed while the chassis is running. The use of the midplane means that the compute nodes and I/O modules do not need their own power cables and do not need network cables or transceivers to connect to each other within the chassis. These features make it easy to add or replace compute nodes and get them operational quickly.

The simple, highly integrated management system allows you to use the Chassis Management Modules integrated into each chassis to administer a single chassis, and the new Lenovo XClarity Administrator offers agent-free hardware management for compute nodes and networking.

Designed for multiple generations of technology

The Flex System Enterprise Chassis is designed to be the foundation of your IT infrastructure now and into the future. Compute performance requirements are always on the rise and networking demands continue to grow with rising bandwidth needs and a shrinking tolerance for latency. The chassis is designed to scale to meet the needs of your future workloads, offering the flexibility to support current and future innovations in compute, storage, and networking technology.

The following figure shows the front of the Enterprise Chassis.

Figure 2. Front of the Flex System Enterprise Chassis

The following figure shows the rear of the Enterprise Chassis.

Figure 3. Rear of the Flex System Enterprise Chassis

The following table lists the standard specifications.

Table 1. Standard specifications

The following table lists what each standard model, Express model and TopSeller model includes. In addition, each model ships with:

• One C19 to C20 two-meter power cable for each power supply
• One Rack Mount Kit

The Flex System Enterprise Chassis 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, the base CTO models are listed in the following table.

• Model HC2 is for chassis orders with an FC5022 switch configured
• Model HC3 is for chassis orders without an FC5022 switch configured

The following table lists the specifications of the standard Enterprise Chassis models.

* CMM1 = first generation Chassis Management Module (68Y7030), CMM2 = Chassis Management Module 2 (00FJ669)
† Model B1x includes two Flex System EN4023 10Gb Scalable Switches, 94Y5212 and two Flex System EN4023 10Gb Scalable Switch (FoD 3) upgrades, 47C9993. The FoD 3 upgrade enables FCoE on all active ports of the switches.
‡ Model B2x includes two Flex System EN4023 10Gb Scalable Switches, 94Y5212 and two Lenovo Flex System FC5022 24-port 16Gb SAN Scalable Switch, 00Y3324.
# Models E3U and E4U include two Flex System Fabric SI4093 System Interconnect Modules, 00FM518 or two Flex System Fabric CN4093 10Gb Converged Scalable Switches, 00FM510, respectively.

The following table lists the compute nodes that are supported in the Flex System Enterprise Chassis. The table also lists the maximum number installable.

Table 4. Supported compute nodes and maximum quantities

Description	Machine type	Firmware code base	Supported in chassis
			8721 with CMM1 (IBM signed)	8721 with CMM2 (Lenovo signed)	Maximum per chassis*
Lenovo ThinkSystem servers
ThinkSystem SN550 V2	7Z69	Lenovo signed	No	Supported	14
ThinkSystem SN550	7X16	Lenovo signed	No	Supported	14
ThinkSystem SN850	7X15	Lenovo signed	No	Supported	7
Lenovo Flex System compute nodes
Flex System x220	7906	IBM signed	Supported	Supported	14
Flex System x222	7916	IBM signed	Supported	Supported	14
Flex System x240	7162	Lenovo signed	No	Supported	14
Flex System x240	8737	IBM signed	Supported	Supported	14
Flex System x240 M5 (E5-2600 v3)	9532	Lenovo signed	Supported	Supported	14
Flex System x240 M5 (E5-2600 v4)	9532	Lenovo signed	No	Supported	14
Flex System x440	7917	IBM signed	Supported	Supported	7
Flex System x440	7167	Lenovo signed	Supported	Supported	7
Flex System x280 X6	7196	Lenovo signed	No	Supported	7
Flex System x480 X6	7196	Lenovo signed	Supported	Supported	7
Flex System x880 X6	7196	Lenovo signed	Supported	Supported	7
Flex System x280 X6	7903	IBM signed	Supported	Supported	7
Flex System x480 X6	7903	IBM signed	Supported	Supported	7
Flex System x880 X6	7903	IBM signed	Supported	Supported	7
Flex System Manager	8731-A1x	IBM signed	Supported	Supported	1**
IBM Power Systems servers
Flex System p24L	1457	IBM signed	Supported	No	14
Flex System p260	7895-22X	IBM signed	Supported	No	14
Flex System p270	7954-24X	IBM signed	Supported	No	14
Flex System p460	7895-42X	IBM signed	Supported	No	7

† The maximum number of compute nodes supported depends on a number of factors. See below.
** A single Flex System Manager appliance can manage up to 16 chassis

The actual number of compute nodes systems that can be powered on in a chassis depends on these factors:

• The TDP power rating for the processors that are installed in the compute nodes (x86 servers)
• The number of power supplies installed in the chassis
• The capacity of the power supplies installed in the chassis (2100 W or 2500 W)
• The power redundancy policy used in the chassis (N+1 or N+N)

For the x480 X6 or x880 X6, if two compute nodes are scaled together, then a maximum of 3 scaled complexes can be installed. For the x880 X6, if four compute nodes are scaled together, then a maximum of 1 scaled x880 X6 complexes can be installed. Other bays can be filled with other compute nodes.

The table in the Power Supplies section provides guidelines about what number of compute nodes can be powered on in the Enterprise Chassis, based on the type and number of power supplies installed.

See ServerProven® for the latest information about the supported servers:
http://www.lenovo.com/us/en/serverproven/flexsystem.shtml

The Flex System Enterprise Chassis has four high-speed switch bays that are capable of supporting a variety of I/O architectures.

The switches are installed in switch bays in the rear of the Flex System Enterprise Chassis as shown in the following figure. Switches are normally installed in pairs (bays 1 & 2, and bays 3 & 4), because I/O adapter cards installed in the compute nodes route to two switch bays for performance and redundancy.

Figure 4. Location of the switch bays in the Flex System Enterprise Chassis

The following tables list the switches that are supported by the chassis.

Note: Some switches are withdrawn from marketing.

† For these switches, IBM signed switch firmware is up to Version 7.x and Lenovo signed switch firmware is Version 8.x onwards

* Withdrawn from marketing
† For these switches, IBM signed switch firmware is up to Version 7.x and Lenovo signed switch firmware is Version 8.x onwards

Each half-wide compute node (such as the ThinkSystem SN550) has two adapter slots, and each full-wide compute node (such as the ThinkSystem SN850) has four adapter slots. The adapter slots in each compute node route through the chassis midplane to the switch bays. The architecture supports up to eight ports per adapter.

The following figure shows how two-port adapters are connected to switches installed in the chassis.

Figure 5. Logical layout of the interconnects between two-port I/O adapters and I/O modules

A four-port adapter doubles the connections between each adapter and switch pair (for example, a four-port adapter in A1 in each compute node routes two connections to switch 1 and two connections to switch 2).

The following figure shows how four-port adapters are connected to switches that are installed in the chassis.

Figure 6. Logical layout of the inter-connections between four-port I/O adapters and I/O modules

The following table shows the connections between adapter slots in the compute nodes to the switch bays in the chassis.

Notes:

• To make use of all four ports of a four-port adapter across all blade servers, the switch must have 28 internal ports enabled, and two switches must be installed in the bays as indicated.
• To make use of six ports of a eight-port adapter across all blade servers, the switch must have 42 internal ports enabled, and two switches must be installed in the bays as indicated. Ports 7 and 8 of an eight-port adapter are reserved for future use. The chassis supports all eight ports, but there are no switches that are available that connect to these ports.

The Chassis Management Module (CMM) provides single-chassis management in the Enterprise Chassis. The CMM is used to communicate with the integrated management module (IMM) controller in each compute node to provide system monitoring, event recording and alerts, and to manage the chassis, its devices, and the compute nodes.

The chassis has one CMM installed standard but supports two CMMs for redundancy. If one CMM fails, the second CMM can detect its inactivity and activate itself to take control of the system without any disruption. The CMM is central to the management of the chassis and is required in the Enterprise Chassis.

There are two versions of the Chassis Management Module available:

• Chassis Management Module 2 (00FJ669) -- contains a Trusted Platform Module (TPM) v2.0 chip and has a Lenovo-signed firmware codebase. This module is recommended for new installation.
• First generation Chassis Management Module (68Y7030) -- contains a Trusted Platform Module (TPM) v1.1 chip and has an IBM-signed firmware codebase

Standard and TopSeller models of the chassis contain either a CMM (68Y7030) or a CMM2 (00FJ669) as listed in Table 2. The selection of CMM determines which compute nodes and I/O modules are supported in the chassis. See Tables 3 and 4 respectively for details. You can replace a CMM with a CMM2, however mixing is not supported -- you cannot have a chassis with one CMM (68Y7030) and one CMM2 (00FJ669).

The following figure shows the Chassis Management Module. See Figure 3 for the location of the CMM in the chassis.

Figure 7. Chassis Management Module

The CMM supports a web-based graphical user interface (GUI) that provides a way to perform CMM functions within a supported web browser. You can also perform management functions through the CMM command-line interface (CLI). Both the web-based GUI and the CLI are accessible via the single RJ45 Ethernet connector on the CMM or from any other system that is connected to the same (management) network.

The CMM does not have a fixed static IPv6 IP address, by default. Initial access to the CMM in an IPv6 environment can be performed by either using the IPv4 IP address or the IPv6 link-local address. The IPv6 link-local address is automatically generated based on the Media Access Control (MAC) address of the CMM.

The CMM is the key component enabling the integrated management network. Internally, the CMM has a multiple port L2 1Gigabit Ethernet switch with dedicated links to all 14 node bays, all four switch bays, and the second CMM, if installed. These connections are all point-to-point, ensuring dedicated bandwidth. The 1GbE links are full-duplex, fixed speed (not auto-negotiate) links. The 1 GbE management network is only accessible by each node's management controller (IMMv2 or FSP), each switch module's management interfaces, the CMM, and the Flex System Manager (FSM) management appliance. This design permits the separation of the management network from the data network.

Lenovo XClarity Administrator is centralized resource management solution aimed at reducing complexity, speeding response and enhancing availability of both Lenovo server systems and solutions.

Lenovo XClarity Administrator provides agent-free hardware management for System x rack servers and Flex System compute nodes and components, including the Chassis Management Module and Flex System I/O modules. The following figure shows the Lenovo XClarity Administrator interface, where both Flex System components and rack servers are being managed and can be seen on the dashboard.

Figure 8. Lenovo XClarity Administrator dashboard

For information about Lenovo XClarity Administrator, see the Lenovo Press Product Guide:
http://lenovopress.com/tips1200

A maximum of six hot-swap power supplies can be installed in the Enterprise Chassis. In models where only two power supplies are standard, additional power supplies are orderable per the following table. All installed power supplies must be the same.

* Use the first feature code for the first 2 power supplies, and use the second feature code for any additional power supplies, up to a total of 6

Each AC power supply part number ships with one 2.0m (6.5 ft) 16A/100-250V, C19 to IEC 320-C20 rack power cable, feature 6292. Other supported AC line cords including three-way split line cords, are listed in the following table.

Table 10. Supported AC line cords

The -48V DC power supply operates at -48V to -60 V dc (nominal) and has a Molex 1060 Power Connector. The power supply ships with one 2.0m DC power cord (FRU part number 69Y1652)

The following figure shows the power supply and highlights the light-emitting diodes (LEDs).

Figure 9. Power supply option

The AC power supplies are 80 PLUS Platinum-certified. The 2500W modules are 2500 Watts output rated at 200VAC to 208VAC (nominal), and 2750W at 220VAC to 240VAC (nominal). The power supply has an oversubscription rating of up to 3538 Watts output at 200VAC. The power supply operating range is 200-240 VAC. The power supplies also contain two dual independently powered 40mm cooling fan modules that are powered not from the power supply itself, but from the chassis midplane. The fan modules are variable speed and controlled by the chassis fan logic.

80 PLUS is a performance specification for power supplies used within servers and computers. To meet the 80 PLUS standard, the power supply must have an efficiency of 80% or greater, at 20%, 50%, and 100% of rated load with PF of .09 or greater. The standard has several grades, such as Bronze, Silver, Gold, and Platinum.

The chassis allows configurations of power supplies to give N+N or N+1 redundancy. A chassis can operate on only three power-supply units (PSUs) with no redundancy, but N+1 or N+N is advised. Three power supplies (or six with N+N redundancy) allow for a balanced three-phase configuration.

All power supply modules are combined into a single power domain within the chassis, which distributes power to each of the compute nodes, I/O modules, and ancillary components through the Enterprise Chassis midplane. The midplane is a highly reliable design with no active components. Each power supply is designed to provide fault isolation and is hot swappable.

In the case of the 2500W supplies, power monitoring of both the DC and AC signals allows the Chassis Management Module to accurately monitor the power supplies.

The following figure shows the compute node bay numbering (left) and power supply bay numbering (right).

Figure 10. Power supply bay numbering

The Enterprise Chassis supports up to a total of ten hot-swap fan modules: two 40 mm (1.57 in) fan modules and eight 80 mm (3.14 in) fan modules. Fans are redundant and the chassis will continue to operate in the event that a fan module fails.

The two 40 mm fan modules distribute airflow to the I/O modules and chassis management modules. Both of these fan modules ship with the chassis. The 80 mm fan modules distribute airflow to the compute nodes through the chassis from front to rear. Each 80 mm fan module actually contains two 80 mm fan modules, back to back at each end of the module, which are counter-rotating. The following figure shows the 80 mm fan module.

Figure 11. 80 mm fan module

Four 80 mm fan modules are installed standard in chassis model 8721-A1x and CTO orders. The maximum number of 80 mm fan modules that can be installed is eight. Ordering information is shown in the following table. When the modules are ordered as a part number, they are supplied as a pair. The feature codes is comprised of one fan.

Table 11. Fan module ordering information

The 80 mm fan modules are populated, depending on the nodes installed. To support the base configuration and up to four nodes, chassis model 8721-A1x ships with four 80 mm fan modules and two 40 mm fan modules preinstalled. There are two cooling zones for the nodes: a left zone and a right zone. Fan modules must be installed in pairs as shown in the following figure. If there are insufficient fan modules for the number of nodes installed, the compute nodes might be throttled to balance heat generation and cooling capacity.

Figure 12. Fan module locations and cooling zones

The 40 mm fan modules are always required. Additional 80 mm fan modules are required as listed in the following table.

Table 12. 80 mm fan module requirements

Dimensions:

• Height: 440 mm (17.3 inches)
• Width: 447 mm (17.6 in)
• Depth, measured from front bezel to rear of chassis: 800 mm (31.5 in)
• Depth, measured from node latch handle to the power supply handle: 840 mm (33.1 in)

Weight:

• Minimum configuration: 96.62 kg (213 lb)
• Maximum configuration: 220.45 kg (486 lb)

Shipping dimensions (approximate):

• Height: 81 cm (32 in)
• Length: 102 cm (40 in)
• Width: 71 cm (24 in)

The Flex System Enterprise Chassis complies with ASHRAE Class A2 specifications.

The following environment is the supported operating environment.

Temperature:

• 0 - 914 m (0 - 3,000 ft): 10 - 40 °C (50 - 104 °F)
• 914 m - 3048 m (3,000 - 10,000 ft): The maximum ambient temperature drops 1 °C for every additional 178 m (584 ft) increase in altitude until the maximum temperature is 28 °C at 3,048 m (10,000 ft)

Relative humidity: 8% - 85%

Maximum altitude: 3,048 m (10,000 ft)

Electrical power:

• 200 - 240 V ac (nominal), 50 or 60 Hz
• Minimum configuration: 0.51 kVA (two power supplies)
• Maximum configuration: 13 kVA (six power supplies)

Power consumption: 12,900 watts maximum

Thermal output, full configuration - 12,900 watts (43,900 Btu/hr)

Acoustical noise emissions for Flex Chassis:

• 7.5 bels operating
• 7.5 bels idling

The noise emission level stated is the declared (upper limit) sound power level, in bels, for a random sample of machines. All measurements are made in accordance with ISO 7779 and reported in conformance with ISO 9296.

The Flex System Enterprise Chassis, 8721, has a three-year warranty.

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

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The server conforms to the following standards:

• ASHRAE Class A2
• FCC - Verified to comply with Part 15 of the FCC Rules Class A
• Canada ICES-004, issue 3 Class A
• UL/IEC 60950-1
• CSA C22.2 No. 60950-1
• NOM-019
• Argentina IEC 60950-1
• Japan VCCI, Class A
• IEC 60950-1 (CB Certificate and CB Test Report)
• China CCC (GB4943); (GB9254, Class A); (GB17625.1)
• Taiwan BSMI CNS13438, Class A; CNS14336
• Australia/New Zealand AS/NZS CISPR 22, Class A
• Korea KN22, Class A, KN24
• Russia/GOST ME01, IEC 60950-1, GOST R 51318.22, GOST R 51318.249, GOST R 51317.3.2, GOST R 51317.3.3
• CE Mark (EN55022 Class A, EN60950-1, EN55024, EN61000-3-2, EN61000-3-3)
• CISPR 22, Class A
• TUV-GS (EN60950-1/IEC 60950-1, EK1-ITB2000)

For enterprise-class installations with multiple Flex System Enterprise Chassis configurations, a top-of-rack Ethernet switch from Lenovo provides the necessary level of networking between racks of systems and the rest of your production network.

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

Power planning for an Flex System Enterprise Chassis is essential.

The Enterprise Chassis has a maximum of six power supplies installed. So, careful consideration must be given to providing the best power-optimized source. Both N+N and N+1 configurations are supported for maximum flexibility in power redundancy. Each AC power supply in the chassis has a 16A C20 three-pin socket and can be fed by a C19 power cable, from a suitable supply.

The chassis has the ability to accommodate a maximum of six power supplies, so it is possible to balance a three-phase power input into a single chassis or a group of chassis. The chassis power system is designed for efficiency using data center power consisting of three-phase, 60A Delta 200 VAC (North America) or three-phase 32A wye 380-415 VAC (international). The chassis can also be fed from single-phase 200 - 240VAC supplies, if required.

For further details, see the Flex System Enterprise Chassis Power Requirements Guide, available from:
https://support.lenovo.com/documents/LNVO-POWINF

Table 14. Power distribution units

The Flex System Enterprise Chassis supports attachments to the uninterruptible power supply units listed in the following table.

Table 15. Uninterruptible power supply units

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

The Flex System Enterprise Chassis is supported in the rack cabinets as listed in the following table. The suggested rack for Flex System is the 42U 1100 mm Enterprise V2 Deep Dynamic Rack, 93634PX.

Table 16. Rack cabinets

* This Office Enablement kit is specifically designed for the BladeCenter S Chassis. The Flex System Enterprise Chassis can be installed in this kit with 1U of space remaining, however the noise generated by the chassis may not be acceptable for office use.

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Ask your Lenovo Financial Services representative about this promotion and how to submit a credit application. For the majority of credit applicants, we have enough information to deliver an instant decision and send a notification within minutes.

For more information, see the following resources:

• Flex System product page
  https://www.lenovo.com/us/en/c/data-center/servers/blades-flex
• Flex System Information Center
  http://flexsystem.lenovofiles.com/help/index.jsp
• Flex System Enterprise Chassis Installation and Service Guide
  http://flexsystem.lenovofiles.com/help/topic/com.lenovo.acc.8721.doc/printable_doc.html?cp=0_4_0_0
• ServerProven hardware compatibility page for Flex System
  http://www.lenovo.com/us/en/serverproven
• Flex System Interoperability Guide
  http://lenovopress.com/fsig
• Power Configurator (for Flex System nodes)
  https://support.lenovo.com/documents/LNVO-PWRCONF
• Lenovo Capacity Planner (for ThinkSystem nodes)
  https://datacentersupport.lenovo.com/us/en/solutions/lnvo-lcp
• Flex System Enterprise Chassis Power Requirements Guide
  https://support.lenovo.com/documents/LNVO-POWINF
• Lenovo Flex System Products and Technology, SG24-8255
  http://lenovopress.com/sg248255
• IBM System Storage® Interoperation Center
  http://www.ibm.com/systems/support/storage/ssic