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The IBM BladeCenter is IBM's blade server architecture.

BladeCenter front side: 8 blade servers followed by 6 empty slots

BladeCenter back side, showing on the left two FC switches and two Ethernet switches. On the right side a management module with console cables.
Contents
1 History
2 Versions
2.1 IBM BladeCenter (E)
2.2 IBM BladeCenter T
2.3 IBM BladeCenter H
2.4 IBM BladeCenter HT
2.5 IBM BladeCenter S
3 Intel based
3.1 HS12
3.2 HS20
3.3 HS21
3.4 HS21 XM
3.5 HS22
3.6 HS40
3.7 HC10
4 AMD based
4.1 LS20
4.2 LS21
4.3 LS22
4.4 LS41
4.5 LS42
5 Power based
5.1 JS20
5.2 JS21
5.3 JS22
5.4 JS12 Express
6 Cell based
6.1 QS20
6.2 QS21
6.3 QS22
7 UltraSPARC based
7.1 T2BC
8 Switch modules
8.1 Gigabit Ethernet
8.2 Storage Area Network
8.3 InfiniBand
8.4 Pass-through
8.5 Bridge
9 High-speed switch modules
9.1 10 Gigabit Ethernet
9.2 InfiniBand 4X
10 See also
11 References
12 External links
//
History
Originally introduced in 2002, based on engineering work started in 1999, the IBM BladeCenter was a relative late comer to the blade market. But, it differed from prior offerings in that it supported the full range of high powered x86 Intel server processors and a variety of high performance input/output (I/O) options. In February 2006, IBM introduced the BladeCenter H with high-speed switch capabilities for 10 Gigabit Ethernet and InfiniBand 4X. It is one of the leading blade architecture products in the information technology (IT) market, with a focus on processor, memory, and I/O configurability delivered with multi-generational forward- and backward-compatibility through collaboration with major IT players including blade.org.
The BladeCenter is OEMed by Intel as the company's Enterprise Blade Server line.
Versions
IBM BladeCenter (E)
This is the original IBM BladeCenter, now marketed as BladeCenter E with 14 blade slots in 7U. Power supplies have been upgraded through the life of the chassis from the original 1200 to 1400, 1800 and the current 2000 watt.
Features
14 blade slots in 7U
Shared Media tray with Optical Drive, Floppy Drive and USB 1.1 port
One (upgradable to two) Management Modules
Two (upgradable to four) Power supplies
Two redundant High-speed blowers
Two slots for Gigabit ethernet switches (can also support optical or copper pass-through)
Two slots for optional switch or pass-through modules, can support additional Ethernet, Fibre Channel, InfiniBand or Myrinet 2000 functions.
IBM BladeCenter T
This is the Telco version of the original IBM BladeCenter, available with either AC or DC (48 V) power. Has 8 blade slots in 8U, but supports the same switches and blades as the regular BladeCenter. To keep NEBS Level 3 compliant special Network Equipment-Building System (NEBS) compliant blades are available.
IBM BladeCenter H
Upgraded BladeCenter design with high-speed fabric options. Fits 14 blades in 9U. Backwards compatible with older BladeCenter switches and blades.
Features
14 blade slots in 9U
Shared Media tray with Optical Drive and USB 2.0 port
One (upgradable to two) Advanced Management Modules
Two (upgradable to four) Power supplies
Two redundant High-speed blowers
Two slots for Gigabit ethernet switches (can also support optical or copper pass-through)
Two slots for optional switch or pass-through modules, can support additional Ethernet, Fibre Channel, InfiniBand or Myrinet 2000 functions.
Four slots for optional high-speed switches or pass-through modules, can support 10Gig Ethernet or InfiniBand 4X.
Optional Hard-wired serial port capability
IBM BladeCenter HT
This is the Telco version of the IBM BladeCenter H, available with either AC or DC (48V) power. Has 12 blade slots in 12U, but supports the same switches and blades as the regular BladeCenter H. But to keep NEBS Level 3 compliant special NEBS compliant blades are available.
IBM BladeCenter S
Targets mid-sized customers by offering storage inside the BladeCenter chassis, so no separate external storage needs to be purchased. It can also use 110V power in the North American market, so it can be used outside the datacenter.
Features
6 blade slots in 7U
Shared Media tray with Optical Drive and USB 2.0 ports
Up to 12 hot-swap 3.5" SAS or SATA drives with RAID 0, 1 and 1E support
Intel based
HS12
Affordable and energy efficient: ideal for Small and Medium Enterprises (SME) and distributed large enterprises. Ample performance to...(and so on)