IBM HS20 User Manual

Workhorse 2-socket single- or dual-core Intel Xeon blade server

Sales Guide

June 2006

Product Overview

CONTENTS

Product Overview 1

Selling Features 2

Key Features 4

Key Options 12

HS20 Images 13

HS20 Specifications 13

BladeCenter Images 15

BladeCenter Specs 16

BladeCenter H Images 17

BladeCenter H Specs 18

BladeCenter T Images 19

BladeCenter T Specs 19

The Bottom Line 20

For More Information 22

Legal Information 22

IBM BladeCenter HS20

Uncompromising 2-socket blade server for businesscritical or telecommunications applications

[Target Customers: Front-and mid-tier applications requiring high performance, enterprise- class availability and extreme flexibility.]

Today’s data center environment is tougher than ever. Customers are looking to reduce IT cost, complexity, space requirements, power consumption and heat output, while increasing flexibility, utilization and manageability. The IBM various BladeCenter chassis, can help them accomplish all of these goals.

A single BladeCenter or BladeCenter H chassis supports up to 14 hot-swappable 30mm HS20 blades in only 7U (BladeCenter) or 9U (BladeCenter H) of rack space. (A rugged 8U BladeCenter T chassis supports up to 8 HS20 blades in a NEBS-3/ETSI-compliant telecommunications environment.) In addition to the blade servers, these chassis also hold up to four (BladeCenter/BladeCenter T) communication switches, or up to ten switches/bridges (BladeCenter H) internally. Not only can this save significant data center space (and therefore the cost of floor space and rack hardware) compared to 1U servers, it also consolidates switches/bridges and cables for reduced complexity and lower cabling costs, and allows clients to manage everything in the solution as one. Using a BladeCenter chassis, up to 84 HS20 servers (168 processors) can be installed in one industry-standard 42U rack but the value of BladeCenter extends far beyond high density data center environments.

Reducing an entire server into as little as .5U of rack space does not mean trading features and capabilities for smaller size. Each HS20 blade server offers features comparable to many 1U rack-optimized full-featured servers: Up to two of the latest single- and dual-core Intel processors, including full-performance/low-power models. The single-core Xeon processor is designed with 1MB or 2MB (model-specific) of L2 cache, a leading-edge 800MHz front-side bus (FSB), 64-bit extensions (EM64T) and Hyper-Threading Technology, to help provide customers with the computing power they require to match their business needs and growth. The dual-core Xeon processor provides two cores with matching 1MB L2 caches, for increased performance at a lower power draw than the single-core version. Both versions of the HS20 support up to 16GB of 400MHz PC2-3200 ECC (Error Checking and Correcting) double data rate II (DDR2) memory (in 4 DIMM slots) with optional Chipkill performance and reliability. Integrated dual Gigabit Ethernet providing high-speed data transfers and offering load-balancing and failover capabilities. Via optional expansion cards, each blade can connect to additional Ethernet, Myrinet, Fibre Channel, iSCSI, InfiniBand chassis. Optional 2-port Expansion Cards add additional fabrics to the HS20 server as needed.

All models offer impressive features at an equally impressive price, including up to two Ultra320 SCSI or SAS hard disk drives (model dependent, with RAID-1 disk mirroring support. An optional 30mm SCSI Expansion unit connects to a blade (model-dependent) to provide an additional two SCSI HDDs, with hot-swap and enhanced RAID-1E support. Moreover, the HS20 is optimized for diskless operation, offering each blade server access to essentially unlimited storage capacity via Fibre Channel or iSCSI.

The various BladeCenter chassis are designed to monitor environmental conditions in the chassis and each blade and send alerts to the administrator. Advanced standard features, such as Predictive Failure Analysis

and blower modules with Calibrated Vectored Cooling secure remote power on/off; text-console redirect over LAN, a management module

(upgradeable to hot-swap/redundant), IBM Director management software and IBM

™,

BladeCenter® HS20 blade server, combined with the

Xeon®

™

protection, for high

controllers are standard,

and other high-speed communication switches housed in the

™

, light path diagnostics, hot-swap redundant power supplies

™

; IPMI 1.5 support, including highly

Actual data transfer speed will vary and is often less than the maximum possible. Gigabit Ethernet transfer speed requires support

on both system and server, and appropriate network infrastructure.

Please see the Legal Information section for important notices and information.

Workhorse 2-socket single- or dual-core Intel Xeon blade server

ServerGuide™ help maintain system availability with increased uptime.

If your customer needs highly manageable, high-performance computing power in a spaceconstrained environment, the HS20 is the ideal system.

Selling Features Price/Performance

• The HS20 offers a choice of high-performance Xeon processors, from a single-core chip with 64-bit extensions, an 800MHz front side bus and 1MB or 2MB of integrated Level 2 cache to a 32-bit dual-core ultra-low power Xeon processor with double the L2 cache (2x1MB) and an 800MHz front side bus. This means there is an HS20 model to fit all budgets and power requirements.

• Selected HS20 blade servers are NEBS3/ETSI-compliant and feature long-life availability. These blades are ideal for telecom or Next Generation Network (NGN) applications such as IPTV, IP Multimedia Subsystem (IMS) and security.

• The extremely high degree of integration in the various BladeCenter chassis eliminates the need for internal server components, replacing numerous fans, KVM and Ethernet cables, power supplies, external switches and other components, with a few hotswap/redundant components in the BladeCenter chassis itself. This integration also can greatly reduce the amount of power consumed and heat produced, relative to an equivalent number of 1U servers. This can significantly reduce a customer’s power bill. The reduced datacenter footprint can also save on infrastructure cost.

• The chassis midplane provides high-speed blade-to-blade, blade-to-switch-module and module-to-module communication internally as well as externally. The midplane in the BladeCenter H provides four 10Gb data channels to each blade, and supports 4X InfiniBand and 10Gb Ethernet bridge modules.

• The BladeCenter chassis use ultrahigh efficiency power supplies. Most industry-standard servers use power supplies that are between 65-75% efficient at converting power from AC wall current to the DC power used inside servers. BladeCenter power modules can be more than 90% efficient. This helps save even more money for the customer, because more of the power input is used for processing, rather than released into the data center as waste heat.

• BladeCenter also reduces the number of parts required to run the system. Sharing fans, systems management, floppy devices and media means fewer parts to buy, maintain, and fewer items that can bring the solution down.

Flexibility

The HS20 has the ability to grow with a customer’s application requirements, thanks to:

• An optional second Xeon processor.

• Up to 16GB of high-speed DDR2 error checking and correcting (ECC) system memory with

optional Chipkill protection.

• Up to two internal 2.5-inch SCSI HDDs, up to two 3.5-inch SCSI HDDs in an adjacent Storage Expansion Unit, and access to terabytes of external IBM System Storage

IBM TotalStorage

In addition, the various BladeCenter chassis offer a high degree of flexibility as well:

• Any combination of Xeon processor-based HS20 and HS40 (4-processor), blades can be used in the same chassis as Opteron processor-based LS20 blades, and IBM PowerPC processor-based JS20 and JS21 blades. Up to 7 non-Low Voltage HS20 blades or up to 8 Low Voltage blades can be used in the BladeCenter T chassis. Depending on the blade servers used, the various BladeCenter chassis support Microsoft Windows, Linux, IBM AIX and Sun Solaris 10 operating systems in the same chassis.

• Every LS20/HS20/HS40/JS20/JS21 blade server ever released by IBM is supported in every BladeCenter chassis ever released, going back to 2002. Every switch module released by

IBM is the same way. (Ask HP and Dell how far back their compatibility goes.) Future blades and fabric switches are expected to continue to be compatible with previous chassis for the foreseeable future.

• A blade server has access to as many as 10 communication switches and/or bridges in one BladeCenter H chassis. And the switches can be Ethernet, iSCSI, InfiniBand, Fibre Channel, Myrinet, or anything else designed and ServerProven for BladeCenter use. Switches, bridges and interface cards are currently available from such vendors as Brocade, Cisco, Intel, McData, Nortel, QLogic, Topspin and others, in addition to IBM.

™

SAN and NAS storage devices.

™

and

Manageability

• The HS20 blade server includes a Baseboard Management Controller (BMC) to monitor

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Workhorse 2-socket single- or dual-core Intel Xeon blade server

server availability, perform Predictive Failure Analysis, etc., and trigger IBM Director alerts.

• Each BladeCenter chassis includes a Management Module or Advanced Management Module to provide additional systems management capabilities, including Web-based out-of-

band control; virtual floppy and CD-ROM support; Windows “blue screen” error capture; LDAP and SSL support; and remote redirection of video, text, keyboard and mouse.

• Integrated industry-standard IPMI 1.5 support works with the BMC to alert IBM Director to anomalous environmental factors, such as voltage and thermal conditions. It also supports highly secure remote power control.

• IBM Director 5.1x is included for proactive systems management and works with both the blade’s internal BMC and the chassis’ management module. It comes with a portfolio of tools, including Management Processor Assistant, RAID Manager, Update Assistant, Software Distribution and a Real Time Diagnostics tool. In addition, IBM Director offers extended systems management tools for additional server management and increased availability. When a problem is encountered, IBM Director can issue administrator alerts via e-mail, pager, and other methods.

Availability and Serviceability

• BladeCenter chassis are designed for operation with greatly reduced potential for single points of failure. Most aspects of operation, from blade servers to communication modules,

to management modules, to power and blower modules, are hot-swappable. The midplane connections are redundant and the other features can be made so, when used in pairs.

• HS20 blade servers support the use of optional Chipkill-enabled memory DIMMs. Chipkill memory can be up to 16X better than standard ECC memory at correcting some types of memory errors. This can help reduce downtime caused by memory errors.

• IPMI 1.5 supports highly secure remote system power on/off using data encryption. This allows an administrator to restart a server without having to visit it in person, saving travel time and getting the server back up and running quickly and securely.

• Temperature-controlled blower modules in the chassis adjust to compensate for changing thermal characteristics. At the lower speeds they draw less power and suffer less wear. Equally important in a crowded data center, temperature-controlled blowers produce less ambient noise in the data center than if they were constantly running at full speed.

• IBM Real Time Diagnostics allows the administrator to run diagnostics on a blade or the chassis without taking the hardware offline. This can provide greater server uptime.

• Text console redirection support allows the administrator to remotely view HS20 text messages over serial or LAN connections.

• A standard three-year (parts and labor) limited onsite warranty peace of mind and greater potential investment protection.

IBM Systems Agenda

The philosophy behind the design of the HS20 and the various BladeCenter Chassis involves four major aspects, Openness, Collaborative Innovation, Virtualization, and Technology Innovation that Matters:

• Unlike competitive blade solutions, many parts of the BladeCenter specifications have been made open. Hundreds of vendors have downloaded the specifications, and dozens so far have released products designed specifically for BladeCenter, including Brocade, Topspin, Cisco, Nortel, Emulex, and others. This provides customers with a wider selection

of options to better fit their needs than a purely proprietary offering could.

• IBM has collaborated with industry leaders to offer innovative solution packages for specific industry segments, including banking, retail, telco and others. In addition, IBM

formed Blade.org, a planned collaborative organization, to focus on accelerating the expansion of solutions for BladeCenter. Founding members in the blade.org community include Brocade, Citrix Systems, Intel Corporation, Network Appliances, Nortel, Novell and VMware.

• IBM offers virtualization capabilities in a number of ways: desktop virtualization via Hosted Clients, InfiniBand virtualization and native blade virtualization (using selected blades).

• Technology for technology’s sake is pointless. Instead IBM BladeCenter focuses on technological innovation that provides real customer benefits. Examples of this include a

high degree of blade and module compatibility across all chassis, the use of fewer and

gives your customers

For terms and conditions or copies of the IBM Statement of Limited Warranty, call 800-772-2227 in the U.S. In Canada call 800-

426-2255. Telephone support may be subject to additional charges. For warranties including onsite labor, a technician is sent after IBM attempts to resolve the problem remotely. International warranty service is available in any country in which this product is sold.

Please see the Legal Information section for important notices and information.

Workhorse 2-socket single- or dual-core Intel Xeon blade server

lower-power components to enable significant power and cooling savings, and hot-swap and redundant components that reduce single points of failure.

Key Features Intel Xeon Processors

The HS20 supports up to two identical Xeon processors (that is, the same clock rate and cache size and the same number of cores). The choice of processors includes:

• 2.8GHz single-core Xeon processor with 64-bit extensions, an 800MHz FSB, 1MB of L2 processor cache and Hyper-Threading Technology

• 2.8GHz Low Voltage single-core Xeon processor with 64-bit extensions, an 800MHz FSB, 1MB of L2 processor cache and Hyper-Threading Technology (NEBS 3/ETSI compliant)

• 3.0GHz Low Voltage single-core Xeon processor with 64-bit extensions, an 800MHz FSB, 2MB of L2 processor cache and Hyper-Threading Technology (NEBS 3/ETSI compliant)

• 2.8, 3.0, 3.2, 3.4, 3.6 or 3.8GHz single-core Xeon processor with 64-bit extensions, an 800MHz FSB, 2MB of L2 processor cache and Hyper-Threading Technology

• 1.67 or 2.0GHz ultra-low power dual-core Xeon processor, with 667MHz FSB and 2MB of L2 processor cache (32-bit platform) (planned NEBS 3/ETSI compliant, 3Q/06)

Intel Extended Memory 64 Technology (EM64T) 64-bit extensions allow Xeon processors to use large memory addressing when running with a 64-bit operating system. This can result in higher performance. Additional registers and instructions (SSE3) can further boost performance for applications written to use them. Customers should contact their software provider to determine their software support for EM64T.

Some HS20 models feature new dual-core Xeon processors, which contain two complete processor cores, each with its own 1MB L2 cache. The two cores appear to software as two physical processors. The dual-core processors offer considerably higher performance than a same-speed Xeon processor with a single core.

Hyper-Threading Technology allows one physical processor to act as two logical processors that share resources, allowing two programs or threads to execute simultaneously and independently. By allowing the processor to use resources that would otherwise have been idle, Hyper-Threading Technology provides a performance boost of up to 30% in CPU resource utilization (according to Intel) on multithreading and multitasking operations that can take advantage of the technology. Go to

http://www.intel.com/products/server/processors/server/xeon/index.htm

Hyper Threading Technology. The full effect of Hyper Threading Technology requires an operating system that has been optimized to take advantage of the feature. Go to

http://www.intel.com/support/platform/ht/os.htm

for more information on

for a list of these operating systems.

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Workhorse 2-socket single- or dual-core Intel Xeon blade server

DDR2 ECC Memory

The HS20 ships with 400MHz PC2-3200 double data rate II (DDR2) dual-interleaved memory DIMMs for fast access. It supports up to 16GB of memory in four sockets, using industrystandard ECC (Error Checking and Correcting) registered DIMMs. It supports optional Chipkill ECC technology (using 1GB or larger DIMMs), for up to 16X better error correction than standard ECC memory.

PC2-3200 memory is available in 512MB, 1GB, 2GB, 4GB and 8GB memory kits (two 256MB, 512MB, 1GB, 2GB or 4GB DIMMs per kit, respectively). DIMMs are installed in pairs for increased performance provided by dual-interleaving.

Large HDD Storage Capacity

The HS20 offers a choice of disk storage, supporting up to two 2.5-inch internal fixed Ultra320 drives.

• 10K RPM 2.5-inch — 36.4 or 73.4GB capacities (146.8GB maximum)

If this is not enough internal storage, an optional “sidecar” storage blade is available. The SCSI

Storage Expansion Unit is a 30mm blade that supports up to two 3.5-inch hot-swap Ultra320 SCSI HDDs. It is installed in the slot adjacent to an HS20 blade server.

• 10K RPM 3.5-inch — 73.4, 146.8 or 300GB capacities (600GB maximum)

Fully populating both the HS20 blade and the expansion unit provides up to 746.8GB of local storage to the HS20 blade server. If the customer needs more storage space, terabyte capacities are possible with optional external SAN storage solutions.

External Tape Storage

The HS20 supports various external rack-mounted SAN-attached tape drives. Supported tape technologies include:

• IBM 2U Universal Tape Autoloader

• IBM 4U Universal Tape Library

Gigabit Ethernet Controller

The HS20 includes an integrated Broadcom 5704 dual-port Gigabit Ethernet controller for up to 10X higher maximum throughput than a 10/100 Ethernet controller. The integrated controller offers failover and load balancing for better throughput and system availability. It also supports highly secure remote power management using IPMI 1.5, plus Wake on LAN (Preboot Execution Environment) Flash interface.

and PXE

Adapter Slots

The HS20 includes one PCI-X adapter slot on each blade. Either one legacy BladeCenter expansion card or one SFF (small form factor) BladeCenter adapter can be installed in this

slot.

Adapters can be used to add interfaces to BladeCenter communication modules, including Fibre

All models require optional Chipkill-enabled DIMMs for Chipkill protection. The DIMMs shipped with the systems are not Chipkill-

enabled. Chipkill memory is designed to detect and correct single- and multibit errors. Reliability improvements depend on many factors and may be less than the maximum stated.

Channel, Myrinet, additional Gigabit Ethernet modules, InfiniBand, etc. Using an SFF adapter allows the use of both internal SCSI HDDs. Using a legacy card limits the number of usable internal HDDs to one.

The SCSI Storage Expansion Unit provides two additional adapter slots for SFF/legacy cards. (The first card must be a Gigabit Ethernet card.)

The optional PCI I/O Expansion Unit II provides two additional slots for standard PCI-X adapters.

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Workhorse 2-socket single- or dual-core Intel Xeon blade server

BladeCenter Chassis

IBM offers three choices of chassis in which to use the HS20 blade server. Each chassis serves different customer needs. The original BladeCenter chassis offers maximum density, great flexibility and a wide variety of expansion options at an entry-level price. The next-generation BladeCenter H chassis offers all of BladeCenter’s capabilities, and adds new high-performance features. For those customers in need of a ruggedized chassis (for example, government/ military or telcos), BladeCenter T offers special features optimized for those environments. There is a high degree of interchangeability and compatibility of features among the three chassis. Any or all of these chassis can be installed in a rack along with other rack-optimized equipment.

BladeCenter is a 7U chassis that provides:

• Reduced single points of failure — Many major components (either standard or optionally) are hot-swappable and/or redundant. Servers and modules can be configured for automatic failover to backups.

• Forward and backward compatibility — Every blade (but one) and every switch and passthru module released by IBM for BladeCenter since 2002 is supported. New blades and fabric switches released by IBM for BladeCenter H or BladeCenter T will also be supported in the original BladeCenter chassis for the foreseeable future.

• Fourteen 30mm blade slots — These hot-swap slots are capable of supporting up to 14 HS20 or HS21 (Xeon), LS20 (AMD

blade servers, or 7 double-wide (60mm) HS40 blade servers or a mixture of 30mm and 60mm blades. It also supports 30mm optional Storage and I/O Expansion Units, Memory and I/O Expansion Units (for HS21), and/or PCI I/O Expansion Unit IIs in combination with the blade servers, using the same blade slots. Up to six chassis can be installed in an industry-standard 42U rack, for a total of up to 84 30mm blade servers per rack, with full power redundancy.

• Four module slots for communication and I/O switches — The modules interface with all of the blade servers in the chassis and eliminate the need for external switches or expensive, cumbersome cabling. All connections are done internally via the midplane. Two module slots are reserved for hot-swap/redundant Gigabit Ethernet switch modules. The other two bays support additional Gigabit Ethernet modules, or Fibre Channel, InfiniBand, and other switch modules or pass-through devices. All modules, when installed in pairs, offer load balancing and failover support. Integrated switch modules mean that no extra rack “U space” is required.

• Two module bays for management modules (IBM BladeCenter Management Module or the new Advanced Management Module, depending on the model of the BladeCenter chassis) — The management module provides advanced systems management and KVM capabilities for not only the chassis itself, but for all of the blades and other modules installed in the chassis. The Management Module provides capabilities similar to the IBM Remote Supervisor Adapter II used in stand-alone IBM System x and tower servers. The features of the Management Module can be accessed either locally or remotely across a network. One module comes standard. A second Management Module can be added for hot-swap/redundancy and failover.

• Four module bays for Blower Modules — Two hot-swap/redundant blower modules come standard with the chassis. They are capable of providing efficient cooling for up to 7 blades. These modules replace the need for each blade to contain its own fans. The two blowers are more energy efficient than dozens or hundreds of smaller fans would be, and they offer many fewer points of potential failure. Two additional blower modules can be installed when more than 7 blades are used in a chassis.

• Four module bays for Power Modules — BladeCenter ships with two 2000W high- efficiency hot-swap/redundant power modules (upgradeable to four), capable of handling

the power needs of the entire chassis. Many servers use power supplies with an efficiency level of approximately 65-75%. Because BladeCenter uses power supplies that are at least 90% efficient, much less power is wasted as heat. Not only is more power available for chassis use, there is less power wasted as excess heat output.

• Redundant Midplane connections — By giving each blade two physical connections to the midplane that connects all blades and modules together internally, a failure of one connector cannot bring down the server.

• A hot-swappable Media Tray containing a DVD-ROM drive, a floppy drive, one USB 1.1 port, and a light path diagnostic panel — The media tray is shared by all the blades in the server. This eliminates unnecessary parts (and reduces the number of parts than can fail). In the event of a failure of the Media Tray the tray can be swapped for another. While the tray is offline, the servers in the chassis can remotely access the Media Tray in another chassis. The light path diagnostic panel contains LEDs that identify which internal components are in need of service.

Opteron®), and JS20/JS21 (IBM PowerPC 970FX/MP)

™

or IBM eServer™ xSeries® rack

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Workhorse 2-socket single- or dual-core Intel Xeon blade server

It is extremely important to include all infrastructure costs when comparing a BladeCenter solution to a competitor’s offering, not just the cost of the chassis and the blades. The high density and level of integration of the BladeCenter chassis greatly reduces the cost of the overall solution. For example, because up to six chassis will fit in a rack, this means that up to 84 blade servers can be installed. (Competitive blade offerings would require a second rack for this many blades.) Also, because up to four Ethernet, Myrinet, Fibre Channel, InfiniBand or other switches can be installed per chassis, up to 24 switches can be installed per rack without having to reserve any “U” space for switches, unlike the competition. (And the integrated switches may be less expensive than external, self-powered switches.) Plus, the number of power distribution units (PDUs) needed per rack may be lessened, because there are fewer discrete devices to have to plug in. In addition, because all the blades are connected to all the switches inside the chassis, there is no need for external Ethernet or other communication cables to connect the blades and switches. (Only the few cables needed to connect the switches to the external world are required.) This not only saves the cost of numerous cables per rack, but also the clutter and bother of routing that many cables. An added bonus is potentially much freer airflow behind the rack, due to fewer cables.

BladeCenter H is an even higher-performing 9U chassis, designed for compute-intensive

environments, such as Earth/Life Sciences, commercial analytics and next-generation network applications. Think of it as BladeCenter’s big brother, with more speed and more features. It provides:

• Forward and backward compatibility — Every blade, switch and passthru module released by IBM for the original BladeCenter chassis since 2002 is supported in the BladeCenter H chassis.

• High-speed redundant Midplane connections — Based on 4X InfiniBand, the midplane supports up to 40Gb bandwidth and provides four 10Gb data channels to each blade. By giving each blade two physical connections to the midplane that connects all blades and modules together internally, a failure of one connector alone cannot bring down the server.

• Fourteen 30mm blade slots — These hot-swap slots are capable of supporting any combination of 14 HS20 (Xeon), LS20 (Opteron), and JS20/JS21 (PowerPC 970FX/MP) blade servers, or 7 double-wide (60mm) HS40 blade servers, or a mixture of 30mm and 60mm blades. It also supports 30mm optional SCSI Storage Expansion Units and/or PCI I/O Expansion Unit IIs in combination with the blade servers, using the same blade slots. Up to four chassis can be installed in an industry-standard 42U rack, for a total of up to 56 30mm blade servers per rack.

• Up to ten module slots for communication and I/O switches or bridges — The modules interface with all of the blade servers in the chassis and alleviate the need for external switches or expensive, cumbersome cabling. All connections are done internally via the midplane. Two module slots are reserved for hot-swap/redundant Gigabit Ethernet switch modules. Two slots support either high-speed bridge modules or legacy Gigabit Ethernet,

Myrinet, Fibre Channel, InfiniBand and other switch modules. Two slots are dedicated for bridge modules. Four additional slots are dedicated for high-speed bridge modules. All modules, when in stalled in pairs, offer load balancing and failover support.

• Integrated switch and bridge modules mean that no additional rack “U” space is required.

• Two module bays for Advanced Management Modules — The new management module provides advanced systems management and KVM capabilities for not only the chassis itself, but for all of the blades and other modules installed in the chassis. The Advanced Management Module provides capabilities similar to the IBM Remote Supervisor Adapter II used in stand-alone xSeries rack and tower servers. New features include concurrent KVM (cKVM) and media tray, an external Serial over LAN connector, more memory, a more powerful onboard processor, industry-standard management interfaces (SMASH/CLP/CIM/HPI), USB virtualization, network failover and backward compatibility with the original Management Module, among others. The features of the module can be accessed either locally or remotely across a network. One module comes standard. A second module can be added for hot-swap/redundancy and failover. The module uses a USB connection, rather than the PS2 connection of the original Management Module.

• Two module bays for Blower Modules — Two hot-swap/redundant blower modules come standard with the chassis. They are capable of providing efficient cooling for up to 14 blades. These modules replace the need for each blade and switch to contain its own fans. The blowers are more energy efficient than dozens or hundreds of smaller fans would be, and they offer many fewer points of potential failure. BladeCenter H also includes up to twelve additional hot-swap/redundant fans to cool the power supplies and high-speed switch

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