HP Surestore 28/48-Slot with DLT7000 HP SureStore Fibre Channel SCSI Bridge 21 - Page 62

Appendix A, Defining Fibre Channel

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Table A-1 Fibre Channel Overview Defining Fibre Channel A fully implemented Fabric system supports over 16 million device addresses, allowing a user to send data from each device at 100 MB per second. Using fiber optic cable, Fibre Channel devices can be spaced at maximum intervals of 10 km, supporting distributed hosts in a campus environment, with centralized storage systems. Fibre Channel uses three connection topologies, illustrated in the following table: Fibre Channel Supported Fabric Topologies Topology Point to point Fibre Channel Arbitrated Loop (FC-AL) Fabric Description Advantages/ Disadvantages Dedicated connection Low cost, high between two devices. performance. Supports up to 126 devices, distributing the 100 MBps data bandwidth among all devices on the loop. Supports more devices. Increasing the number of devices reduces performance. A switching concept, similar to a telephone system, providing simultaneous data-transmission among multiple devices at 100 MBps. Supports multiple devices without performance reduction. Higher cost. A- 4 Appendix A

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A-4
Appendix A
Fibre Channel Overview
Defining Fibre Channel
A fully implemented Fabric system supports over 16 million device
addresses, allowing a user to send data from each device at 100 MB per
second. Using fiber optic cable, Fibre Channel devices can be spaced at
maximum intervals of 10 km, supporting distributed hosts in a campus
environment, with centralized storage systems. Fibre Channel uses
three connection topologies, illustrated in the following table:
Table A-1
Fibre Channel Supported Fabric Topologies
Topology
Description
Advantages/
Disadvantages
Point to point
Dedicated connection
between two devices.
Low cost, high
performance.
Fibre Channel
Arbitrated Loop
(FC-AL)
Supports up to 126
devices, distributing
the 100 MBps data
bandwidth among all
devices on the loop.
Supports more
devices.
Increasing the
number of devices
reduces performance.
Fabric
A switching concept,
similar to a telephone
system, providing
simultaneous
data-transmission
among multiple
devices at 100 MBps.
Supports multiple
devices without
performance
reduction.
Higher cost.