IBM Partner Pavilion DS4100 : - IBM switch Users and Maintenance Guide : Page 78

v Do not overtighten the cable straps or bend the cables to a radius of less than 38

mm (1.5 in.).

v Do not put excess weight on the cable at the connection point. Be sure that the

cable is well supported.

Installing SFP modules

The DS4100 host ports require SFP modules. SFP modules are used to convert

electrical signals to optical signals that are required for fibre channel transmission to

and from RAID controllers. The DS4100 supports two types of SFP modules: one

with a plastic latch and one with a wire latch. After you install the SFP modules, you

use fiber-optic cables to connect the DS4100 to other fibre channel devices.

Before you install 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 server.

Use either long-wave SFPs or short-wave SFPs. You can use the DS4000

Storage Manager client to view the storage subsystem profile in order to verify

that you are not mixing long-wave and short-wave SFPs.

v The SFP module housing has an integral guide key designed to prevent you from

inserting the SFP module improperly.

v Use minimal pressure when you insert the SFP module into a port. Forcing the

SFP module into a port could cause damage to the SFP module or the port.

v You can insert or remove the SFP module while the port is powered on.

v The operational 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 48 for

more information.

To

install an SFP module, complete the following steps.

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.

46 IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide