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
Failure
Down
Cell
Cell
Cell
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Crossbar Controller Mudularization
Only the node that is linked directly to the failed crossbar
will be temporarily shutdown
Failure |
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Down | llCell |
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The failed crossbar |
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card can be |
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replaced without halting
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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).
| Front Side |
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| Fan box |
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Service |
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Clock | Cell card | Crossbar | Cell card |
card | Fan box | card |
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PCI Box |
HDD Module | Power |
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| Unit | Sample: Express5800/1320Xf |
| Operation 1 |
| Operation 2 | Spare |
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| Operation 4 | Redundant Crossbar | ||||
| Node 1 |
| Node 2 | Cell Card |
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| Redundant Clock Module | ||||||||||
Cell card | Cell card | Cell card | Cell card | Cell card | Cell card | Cell card | ||||||||
CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | (Redundancy or Segmentation) |
CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | CPU | Redundant service processor |
Memory | Memory | Memory | Memory | Memory | Memory | Memory | ||||||||
Memory | Memory | Memory | Memory | Memory | Memory | Memory | N+1 redundant cooling fan | |||||||
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| Crossbar Card | Quick recovery is possible | ||||||
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| Full redundancy is available on the |
PCI box | PCI box | PCI box |
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| PCI box | PCI box | PCI box | 1320Xf/1160Xf. Segregation is available | ||||||
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| Available on the 1320Xf/1160Xf |
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| 2N is included in the 1320Xf, and is offered |
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| as an option on the 1160Xf/1080Rf |
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| Clock Card |
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| Clock Card |
| * This picture illustrates a 1320Xf | ||
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| Cooling fan (N+1 redundant) |
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| Power supply (N+1 / 2N redundant) |
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