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Mainframe-class RAS Features
Highly Available Center Plane
System restoration after the replacement of a failed crossbar card
no longer requires a planned system downtime
The Express5800/1000 series server has separated and
modularized the crossbar controller which ordinarily would reside
on the system center plane. By moving the crossbar controller off
of the center plane, a reduction in center plane failures has been
realized.
In the unlikely event of a crossbar failure, only the partition that is
linked to the crossbar will be temporarily shutdown, allowing for
the other partitions to continue operations uninterrupted, including
during the replacement of the crossbar card.
(The 1080Rf has a crossbar-less configuration.)
Complete modularization and redundancy
Improvements in fault resilience, continuous operation and serviceability
Major components of the Express5800/1000 series servers have
been modularized, allowing for better serviceability and easy
replacement in the event of a component failure.
Furthermore, to minimize the existence of single point of failure,
many of these modules have redundancy, allowing for continuous
operations (fault resilience).
Operation 1
Node 1
Cell card
Cell card
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
Memory
Memory
Memory
Memory
Crossbar Card
Crossbar Card
PCI box
PCI box
Clock Card
8
Operation 2
Spare
Operation 3
Node 2
Cell Card
Node 3
Cell card
Cell card
Cell card
Cell card
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
Memory
Memory
Memory
Memory
Memory
Memory
Memory
Memory
Crossbar Card
Crossbar Card
PCI box
PCI box
PCI box
Service Processor
Cooling fan (N+1 redundant)
Power supply (N+1 / 2N redundant)
Failure
Down
The failed crossbar
replaced without halting
other business
Front Side
Fan box
Service
Processor
Cell card
Clock
Fan box
card
PCI Module
PCI Box
HDD Module
Power
Distribution
Unit
Operation 4
Redundant Crossbar
Node 4
Redundant Clock Module
Cell card
(Redundancy or Segmentation)
CPU
CPU
CPU
CPU
CPU
CPU
Redundant service processor
Memory
N+1 redundant cooling fan
Memory
N+1 redundant power supply
Quick recovery is possible
with a spare CELL card
1080Rf is crossbar-less
Full redundancy is available on the
1320Xf/1160Xf. Segregation is available
PCI box
on the 1320Xf
Available on the 1320Xf/1160Xf
2N is included in the 1320Xf, and is offered
as an option on the 1160Xf/1080Rf
* This picture illustrates a 1320Xf
Clock Card
Crossbar Controller Mudularization
Only the node that is linked directly to the failed crossbar
will be temporarily shutdown
Failure
Down
card can be
operations.
Back Side
Fan box
Cell card
Crossbar
card
Fan box
Sample: Express5800/1320Xf
Crossbar
Controller
(LSI)
Crossbar
Card
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