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

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bandwidth and higher bandwidth fiber optic cable. Nominal specifies modal bandwidth of 500
MHz-km at 850 nm for 50 micron fiber optic cable (type OM2), and 200 MHz-km at 850 nm for
62.5 micron fiber optic cable (type OM1). Higher specifies modal bandwidth of 2000 MHz-km at
850 nm for 50 micron fiber optic cable (type OM3).
Table 74 through Table 78 list the maximum loss budgets for different interconnect speeds at specific
distances. Table 79 through Table 82 and Table 85 and Table 86 list the maximum supported distances
based on switch-to-switch (ISL) or device-to-switch connectivity.
NOTE:
The following tables do not specify media losses due to variances between different fiber optic cable
manufacturers. In all cases, the maximum loss budget is the total channel insertion loss, which includes
media losses based on the indicated fiber optic cable bandwidth.
HP supports the use of optical fiber patch panels. The total channel insertion loss between the transmitter
and receiver for the cable segment routed through the patch panel must not exceed the maximum
listed for the connector and cable type.
NOTE:
Channel insertion loss is the combined passive loss from connectors, splices, and media between the
transmitter and receiver.
A mated connector pair is defined as a device or switch transceiver-to-cable connection, or a
cable-to-cable connection when using a passive coupler in a patch panel. A typical (nonpatch panel)
installation has two mated pairs per cable segment (one for each end of the cable). Additional mated
connector pairs are allowed between two transceivers, provided the total loss of all connectors and
cables does not exceed the total channel insertion loss.
Table 72 lists the 8 Gb/s fiber optic cable loss budgets when using nominal bandwidth OM1 or
OM2 multi-mode fiber optic cable.
Table 72 8 Gb/s fiber optic cable loss budgets (nominal bandwidth)
Maximum loss per
mated connector pair
Total channel insertion
loss
Maximum distance per
cable segment Cable
0.75 dB
1.68 dB 50 m
50/125 micron (OM2
500 MHz-km at 850 nm)
1.58 dB 21 m
62.5/125 micron (OM1
200 MHz-km at 850 nm)
6.4 dB
1
10 km
9/125 micron (single-
mode)
1
This number assumes use of low-loss fiber optic cables for 8 Gb/s speeds.
Table 73 lists the 8 Gb/s fiber optic cable loss budgets when using higher bandwidth OM3 multi-mode
fiber optic cable.
SAN Design Reference Guide 169