IBM DS3500, Installation, User & 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 storage subsystem requires SFP modules. SFP modules convert electrical
signals to optical signals that are required for Fibre Channel transmission to and
from RAID controllers. After you install the SFP modules, you use fiber optic cables
to connect the storage subsystem to other Fibre Channel devices.
Before installing SFP modules and fiber optic cables, read the following information:
v
Do not mix long-wave SFP modules and short-wave SFP modules on a single
storage subsystem. Use only short-wave SFP modules. You can use the DS
Storage Manager Client to view the Storage Subsystem Profile to make sure that
you are not mixing long-wave and short-wave SFP modules.
Attention: Do not use long-wave SFP modules or Gigabit Interface Converters
(GBICs) in any of the Fibre Channel ports in the storage subsystem controllers.
(Long-wave SFP modules and GBICs are not supported for use in the storage
subsystem or any of the attached expansion enclosures. Long-wave SFP
modules and GBICs are supported only in the Fibre Channel switch ports to
which the storage subsystem connects.)
v The SFP module housing has an integral guide key that is designed to prevent
you from inserting the SFP module incorrectly.
v
Use minimal pressure when inserting an SFP module into a Fibre Channel 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.
v
The operational or redundant loop performance is not affected when you install
or remove an SFP module.
v
You must insert the SFP module into a port before you connect the fiber optic
cable.
v You must remove the fiber optic cable from the SFP module before you remove
the SFP module from the port. See “Removing SFP modules” on page 30 for
more information.
v
The speed of the SFP module determines the maximum operating speed of the
Fibre Channel port in which the SFP module is installed. For example, a 2-Gbps
SFP module that is connected to a 4-Gbps-capable port will limit the speed of
that port to a maximum of 2 Gbps.
Attention: Carefully check the IBM part number, option number, and FRU part
number of the SFP module to identify its speed. There are no physical features
that distinguish an 8 Gbps, 4 Gbps, or 2 Gbps SFP module from each other.
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System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide