Hp COMPAQ PROLIANT 6500, COMPAQ PROLIANT 7000 PCI Hot Plug Technology
June 1998
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Compaq Computer
Corporation
ECG Technology
Communications
ONTENTS
C
Introducti on
Three PCI Hot Plug
Capabilities
Synergistic HighAvailability Techniques
PCI Hot Plug: Compaq
Strategy
Progress Towar d an
Industry Standard
Summary of PCI Hot
Plug
System Hardware
System Soft ware
Hardware and Software
Control
Adapters and Device
Drivers
Compatibility I ssues
Conclusion
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ECG080/0698
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ECHNOLOGY
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PCI Hot Plug Technology
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As an increasing number of companies migrate their business-critical applications to
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industry-standard servers, the need for high-availability solutions to minimize system
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downtime is increasing. Compaq, the world’s leading server provider, has historically
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taken a leadership role in developi ng i ndust ry-s tandar d t echnologi es. With the
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development of PCI Hot Plug technology, Compaq strengthens i t s r ole in provi ding hi gh-
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availability solutions for the enterprise.
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This technology brief summarizes the PCI Hot Plug technology and describes Compaq’s
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strategy for developing and standardi zi ng th is technol ogy.
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Please direct comments regarding this communication to the ECG Technology Communications Group at this Internet address:
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TechCom@compaq.com
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B
RIEF
ECG080/0698
ECHNOLOGY BRIEF
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OTICE
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The information in this publication is subject to change without notice and is provided “AS IS”
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WITHOUT WARRANTY OF ANY KIND. THE ENTIRE RISK ARISING OUT OF THE USE
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OF THIS INFORMATION REMAINS WITH RECIPIENT. IN NO EVENT SHALL COMPAQ
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BE LIABLE FOR ANY DIRECT, CONSEQUENTI AL, INC I DE NT AL, SPECIAL, PUNITIVE
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OR OTHER DAMAGES WHATSOEVER (INCLUDING WITHOUT LIMITATION,
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DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION OR LOSS OF
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BUSINESS INFORMATION), EVEN I F COMPAQ HAS BEEN ADVI SE D OF T HE
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POSSIBILITY OF SUCH DAMAGES.
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The limited warranties for Compaq products are exclusively set forth in the documentation
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accompanying such products. Nothing herein should be construed as constituting a further or
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additional warranty.
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This publication does not constitute an endorsement of the product or products that were tested.
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The configuration or configurations tested or described may or may not be the only available
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solution. This test is not a determination of product quality or correctness, nor does it ensure
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compliance with any federal state or local requirements.
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Compaq, Contura, Deskpro, Fastar t , Compaq In sight Manager, LTE, PageMar q, Systempro,
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Systempro/LT, ProLiant, TwinTray, ROMPaq, LicensePaq, QVision, SLT, ProLinea, SmartStart,
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NetFlex, DirectPlus, QuickFind, RemotePaq, BackPaq, TechPaq, SpeedPaq, QuickBack, PaqFax,
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Presario, SilentCool, CompaqCare (design), Aero, SmartStation, MiniStation, and PaqRap,
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ProSignia, Concerto, Vocalyst, and MediaPilot are registered with the United States Patent and
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Tradema rk Office.
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Change is Good, Compaq Capital, Colinq, Armada, SmartQ, Counselor, CarePaq, Netelligent,
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Smart Uplink , Ext ended Repeater A rchitectu re, Scalabl e C lock Archit ecture, QuickChoi ce,
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Systempro/XL, Net1, LTE Elite, PageMate, SoftPaq, FirstPaq, SolutionPaq, EasyPoint, EZ Help,
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MaxLight, MultiLock, QuickBlank, QuickLock, UltraView, Innovate logo, and Compaq PC Card
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Solution logo are trademarks and/or service marks of Compaq Computer Corporation.
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Micr osoft, Windows, Windows NT, Windows NT Advanced Ser ver, SQL Server for Win d ows NT
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are trademarks and/or registered trademarks of Microsoft Corporation.
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NetWare and Novell are registered tra demarks and Intran etWar e, NDS, and Novel l Dir ectory
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Services are t rademar k s of Novell, Inc.
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Pentium is a registered trademark of Intel Corporation.
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Other product names mentioned herein may be trademarks and/or registered trademarks of their
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respective companies.
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©1998 Compaq Computer Corporation. All ri ghts reserved. Printed in the U.S.A.
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PCI Hot Plug Techno logy
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Fourth Edition (June 1998)
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ECG080/0698
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(cont.)
ECG080/0698
ECHNOLOGY BRIEF
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NTRODUCTION
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Customers today need high-availability solutions that minimize or eliminate downtime. PCI Hot
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Plug technology allows a PCI adapter to be added, upgraded, or replaced while the host system is
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running and while other adapters in the system provide uninterrupted service. PCI Hot Plug
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technology adds to other high-availability solutions presently available from Compaq such as
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Recovery Server Options, Redundant Netelligent Network Interface Controllers (NICs), hot-
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pluggable power supplies, hot-pluggable fans, and hot-pluggable SCSI drives.
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Three PCI Hot Plug Capabilities
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PCI Hot Plug technology provides for three major capabilities: hot replacement, hot upgrade, and
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hot expansion.
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Hot replacement
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identical
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Hot upgrade
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replacing th e adapt er ’s device driver with an upgra ded device driver while the server is operating.
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Hot expansion
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while the server is operating.
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Synergistic High-Availability Techniques
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PCI Hot Plug technology represents a significant advance in fault-tolerant systems. To provide
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even greater benefit, PCI Hot Plug technology can be combined with redundant controller
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configurations, such as Compaq Redundant Netelligent NIC technology.
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Compaq Redundant Netelligent NIC technology allows two similar NICs to share a single
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ins tan ce of devi ce d river code. One NIC becomes the a ctive n etwork control ler, and the other
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NIC acts as a standby controller. If the active NIC fails, the network traffic can be switched
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automatically to the standby NIC. With PCI Hot Plug, the failed NIC can be replaced without
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shutting down the system. Thus, the end user can have continuous service and the administrator
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can eliminate both planned and unplanned downtime.
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PCI H
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Compaq’s decision to develop PCI Hot Plug technology is focused on addressing a key customer
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issue: as computing environments grow more complex, the business costs of unplanned system
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downtime are soaring. The increasing cost of unplanned downtime in business-critical
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environments, compounded by the time spent tracking the source of network or component
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failures, is creating a greater need for high-availability solutions like PCI Hot Plug.
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In the past, reliable and powerful around-the-clock performance was available only from
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expensive, proprietary systems. Although these proprietary solutions may give the developer an
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initial competitive advantage, they generally have not been well received by customers .
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Proprietary solutions tend to be more costly and less accessible. They also require the customer to
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be wary of compatibility issues.
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An open, industry-standard approach, such as Compaq’s PCI Hot Plug effort, has multiple
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benefits. First, customers benefit from the increased availability of the hot-plug solution.
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Because PCI Hot Plug is an open, industry standard, it allows multiple system providers,
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operating system (OS) developers, and adapter suppliers to implement PCI Hot Plug solutions.
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Additionally, customers have investment protection because hot plug is compatible with previous
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PCI st andards . Th erefore, an y new hot-plug system hardware, OSs, or ad apter device drivers are
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PCI compliant and will work with existing PCI-compliant systems. The entire system does not
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adapter into the same slot while the server is operating.
is the process of replacing an existing adapter with an
is the process of installing an
OT PLUG
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is the process of removing a failed or failing PCI adapter and inserting an
adapter or
additional
OMPAQ STRATEGY
: C
upgraded
adapter into a previously empty slot
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