IBM DS3950, Installation, User'S, And Maintenance Manual, Page: 77 / 252

v
You can insert or remove the SFP module while the port is powered on.
v
Do not install an SFP in any port that will not have a fiber-optic cable attached.
Remove any SFP from any port that does not have fiber-optic cables attached.
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. Refer to “Removing SFP modules” on page 50 for
more information.
v
The maximum operating speed of the Fibre Channel port is determined by two
factors: the speed of the SFP module that is installed and the speed of the Fibre
Channel connection. For example, a 4 Gbps SFP that is plugged into an 8
Gbps-capable port will limit the speed of that port to a maximum of 4 Gbps.
Conversely, an 8 Gbps SFP that is plugged into a 4 Gbps-capable port will limit
the speed of the port to a maximum of 4 Gbps.
Attention: Carefully check the SFP IBM part number, option number, and FRU
part number to identify its speed. There are no physical features that distinguish
a 4 Gbps SFP from an 8 Gbps SFP.
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-optic devices, or
transmitters) are installed, note the following:
v
Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable parts
inside the device.
v Use of controls or adjustments or performance of procedures other than those
specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser diode.
Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
Attention: When you handle static-sensitive devices, take precautions to avoid
damage from static electricity. For details about handling static-sensitive devices,
see “Handling static-sensitive devices” on page 29.
To install an SFP module, complete the following steps:
1. Remove the SFP module from its static-protective package.
Chapter 3. Cabling the storage subsystem
49