HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays, Reference Manual

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• NL_Port —Connects a Fibre Channel device to a Fibre Channel arbitrated loop or switch
Fiber optic cables
All 8 Gb/s, 4 Gb/s and 2 Gb/s components use industry-standard LC connectors for fiber optic cable
connections; all 1 Gb/s components use industry-standard SC connectors. Cables and adapters are
available with SC connectors on one end and LC connectors on the other end.
Some fiber optic cable installations require SC or LC duplex couplers to couple the cable connector
ends (for example, if you use wall jacks or connect to existing installed cables). HP supports the use
of duplex couplers, provided that you do not exceed the overall cable loss budget for that cable
segment.
For cable part numbers, see the Fibre Channel switch QuickSpecs on http://www.hp.com/go/
QuickSpecs .
Table 71 describes the rules for fiber optic cable connections.
Table 71 Rules for fiber optic cable connections
Description
Rule
nl
number
The minimum bend radius is 25 mm for 50, 62.5, and 9 micron fiber optic cable. HP recommends
50 micron fiber optic cable for new installations that require multi-mode fiber connections. The
62.5 micron fiber optic cable is acceptable for existing installations. See
Table 74 for supported
maximum cable distances.
1
HP does not support a mixture of 50, 62.5, and 9 micron cable in the same cable segment.
Note: A cable segment is defined as one or more cables connected serially between two
transceivers.
2
HP does not support a mixture of different OM fiber cable types in the same cable segment. 3
For all cable segments, you must use the same transceiver type at both ends of the cable (for
nl
example, short-wave transceiver to short-wave transceiver, long-wave transceiver to long-wave
transceiver). HP does not support mixing transceiver types in the same cable segment.
4
For fabric attachment, the minimum cable segment length between Fibre Channel components
(transmitter and receiver) is:
• 0.5 m for 50 and 62.5 micron cable
• 2.0 m for 9 micron cable
The minimum length does not apply to patch cords through a passive patch panel; it applies only
to the total distance between the transmitter and receiver of each device connected through the
patch panel.
5
For fiber optic cable lengths greater than 50 m, contact a third-party vendor. 50 micron cable
must be duplex, tight-buffered multi-mode 50/125 µm (Belcore GR-409 compliant). The connectors
must be SC or LC duplex low metal (Belcore and IEC compliant).
9 micron cable must be duplex, tight-buffered, single-mode 9/125 µm (Belcore GR-409 compliant).
The connectors must be SC or LC duplex low metal (NTT-SC Belcore 326, IEC-874-19 SC
compliant). 6
Fiber optic cable loss budgets
Cable loss budgets are determined by the Fibre Channel Physical Interface Specification (see the
standards at
http://www.incits.org/ ). The maximum distances are based on the use of nominal
SAN fabric connectivity and switch interoperability rules 168