Pci Hot Plug Technology; Technologies - Compaq ProLiant 8500 Technology Brief

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ECHNOLOGY RIEF
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The ProLiant 8500 server includes two 200-cubic-feet-per-minute hot-plug fans. These heavy-duty
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fans and thermal design modifications allow the ProLiant 8500 server to maintain proper airflow
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and temperature with only one hot-plug fan. The second hot-plug fan provides redundancy for the
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server.
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For rack configurations of multiple ProLiant 8500 servers, Compaq designed a new rack series.
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The series includes racks with perforated doors and door inserts that provide better airflow and
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I G H V A I L A B I L I T Y
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Tolerance of server downtime continues to decrease as companies become more global,
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decentralized, and aware of downtime costs. The ProLiant 8500 server answers the demand for
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high availability by incorporating the following features into the server hardware:
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PCI Hot Plug technology

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Redundant NIC technology
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Redundant, hot-plug fans
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Redundant PPMs
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Redundant, hot-plug power supplies
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Hot-plug drives
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Auto processor bus recovery
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Redundant components help ensure that the server is highly fault tolerant. In redundant
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configurations, if a power supply, fan, or PPM fails, the redundant standby component can take
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over operation with no downtime to the server. With the addition of hot-plug capabilities, server
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downtime can be eliminated while components are being replaced, added, or upgraded.
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PCI Hot Plug Technology
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The Compaq ProLiant 8500 server incorporates industry-standard PCI Hot Plug technology. This
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technology, pioneered by Compaq, adds hot-plug capabilities to existing PCI adapters for increased
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system availability and serviceability. Compaq led the industry by licensing its PCI Hot Plug
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implementation to Intel, thus broadening customer access to this industry-standard technology.
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Compaq's implementation of PCI Hot Plug incorporates electronics into the server to control each
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PCI Hot Plug slot individually, so that a single slot can be powered down without affecting the
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operation of the other slots. Compaq's implementation of the PCI Hot Plug standard allows the
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following capabilities while the system is running:
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Hot replacement – replacing a single PCI adapter with a similar adapter
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Hot upgrade – replacing a PCI adapter with an upgraded adapter
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Hot expansion – adding a PCI adapter to an empty slot
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The ProLiant 8500 server supports all three hot-plug capabilities for all 64-bit PCI Hot Plug slots.
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These capabilities can be added incrementally, depending on the OS implementation.
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