IBM System Storage DS5020, Installation, User'S, And Maintenance Manual

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– 4 Gbps: 150 m (492 ft.) of 50/125 um fiber, 300 m (984 ft.) of 62.5/125 um
fiber
– 8 Gbps: 50 m (164 ft.) of 50/125 um fiber, 150 m (492 ft.) of 62.5/125 um fiber
Installing SFP modules
The DS5020 requires SFP modules. SFP modules convert electrical signals to
optical signals that are required for Fibre Channel transmission to and from RAID
controllers.
Note: The SFPs are preinstalled in the DS5020.
If the SFPs are not preinstalled in your DS5020 hardware, or if you need to replace
them, use the information in this section to install the SFPs into the ports. After you
install the SFP modules, you can use fiber-optic cables to connect the DS5020 to
other Fibre Channel devices.
Before installing SFP modules and fiber-optic cables, read the following information:
v Do not mix long-wave SFPs and short-wave SFPs on a single storage
subsystem. Use only short-wave SFPs. You can use the DS Storage Manager
client to view the Storage Subsystem Profile to verify that you are not mixing
long-wave and short-wave SFPs.
Attention: Do not use long-wave SFPs or GBICs in any of the Fibre Channel
ports in the DS5020 controllers. (Long-wave SFPs and GBICs are not supported
for use in the DS5020 or any of the attached storage expansion enclosures.)
v
The SFP module housing has an integral guide key that is designed to prevent
you from inserting the SFP module improperly.
v Use minimal pressure when inserting an SFP module into an SFP port. Forcing
the SFP module into a port could cause damage to the SFP module or to the
port.
v
You can insert or remove the SFP module while the port is powered on.
1.5 inch
(38 mm)
radius
3.0 inch
(76 mm)
diameter
Figure 25. Bending and looping specifications for fiber-optic cables
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IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide