Sun Oracle Storage Tek T10000, Справочное руководство

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E20425-01 • Chapter 2 Physical Interface 13
Cables and Connectors
Redundant Paths
The tape drive interface cards are dual port to support redundant paths.
Figure 4 is an example of one server using hubs to provide redundant paths to
the same device.
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Cables and Connectors
Because the link to a port can be driven either optically or electrically, the term
“fibre” in Fibre Channel refers to either a fiber optic or a copper cable.
• Optical transmission occurs over both single and multi–mode fibers using
both laser and light emitting diodes (LEDs) for both short (770–850 nm)
and long (1300–1360 nm) wavelengths.
• Electrical transmissions occur over video coax, miniature coax, twin coax
(Twin Ax), or twisted pair.
Note: The two types of links, either fiber optic and/or copper, can be
integrated into a single network, as long as there is a Fabric, hub, or
other type of converter present.
Cable Guidelines
Guidelines for 1 Gb cable lengths and hubs per cascade include:
• Minimum cable length is 2 m (6.5 ft)
• Maximum cable length depends on the type of connection:
-
Copper = 13 m (42.6 ft) intra-cabinet
- Copper = 33 m (108 ft) inter-cabinet
- Short-wave fiber optics = 500 m (1,640 ft)
- Long-wave fiber optics = 10 kilometers (6.2 miles)
Figure 6. Redundant Paths