IBM E User Manual download pdf (Page 10)

/ 1400W 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 S 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. Two additional power modules must be installed when the second Storage Module

is used.

• Redundant midplane connections — Each chassis contains a midplane that connects

all blades and modules together internally. The midplane provides two physical

connections to each blade; therefore, a failure of one connector alone cannot bring down

the server.

• A hot-swappable Media Tray containing a DVD-RW/CD-RW drive, two USB 2.0 port,

two BBU module bays, 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 diagnostic LEDs indicate chassis status.

It is extremely important to include all infrastructure costs when comparing a

BladeCenter S 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 24 switches can be installed per rack without having to

reserve any “U” space for the 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 reduced, 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 E 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 — Most blades, and every switch and passthru

module released by IBM for BladeCenter E since 2002, are supported. Many new blades

and fabric switches released for IBM BladeCenter H, BladeCenter T, or BladeCenter HT

are also supported in the BladeCenter E chassis.

• Fourteen 30mm blade slots — These hot-swap slots are capable of supporting almost

any combination of 14 HC10/HS12/HS20/HS21/HS21 XM, LS20/LS21, and

JS12/JS20/JS21, or QS20 (Cell/B.E) blade servers, or 7 double-wide (60mm) HS40 or

LS41 blade servers or a mixture of 30mm and 60mm blades. (Note: The QS20 blade

cannot be mixed with other blades.) It also supports multiple optional 30mm Expansion

Units 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 bays 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, and error-prone 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 “U space” is required in the rack.

• Two module bays for management modules (IBM BladeCenter Management Module

or the newer 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

™

or IBM eServer

™

xSeries

rack 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.

• Two module bays fo

Blower Modules

—

Two hot-swap/redundant blower modules

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

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