Replacing An Sfp Module - IBM System Storage DS4000 EXP420 Installation, User And Maintenance Instructions

Electrostatic discharge can damage sensitive components. To prevent electrostatic
discharge damage to the storage expansion enclosure, use proper antistatic
protection when handling components.
1. Use the DS4000 Storage Manager client software to print a new storage
subsystem profile.
2. Using the Recovery Guru, identify the failed component that needs to be
replaced.
3. Check the Fault LEDs to locate the failed SFP module. If a fault is detected,
the amber Fault LED is on.
Attention: Potential loss of data access - To prevent loss of access to
data, remove only the SFP module that has a failed status in the storage
management software and has Port Bypass LED lit.
4. Put on antistatic protection.
5. Unpack the new SFP module. Verify that it is the same type of module you are
replacing. If it is not, contact IBM Customer and Technical Support.
Attention:
v The speed of the SFP module determines the maximum operating speed of
the fibre channel port in which the SFP is installed. For example, a 2-Gbps
SFP that is plugged into a 4-Gbps-capable port will limit the speed of that
port to a maximum of 2 Gbps.
v Handle and install fibre-optic cables properly to avoid degraded performance
or loss of communications with devices. For specific handling guidelines,
see "Handling fibre-optic cables" on page 42.
6. Disconnect the interface cables from the SFP module.
7. Remove the failed SFP module from the controller.
8. Install the new SFP module into the controller.
9. Reconnect the interface cable.
ESM Fault Light
ESM
Fiber-optic cable
(Host interface cable)
Figure 50. Replacing an SFP module
10. Check the Bypass and Fault LEDs for the new SFP module.
11. Based on the status of the Bypass and Fault LEDs, choose one of the
following steps:
v Bypass LED or Fault LED is on - Reinstall the SFP module and cables,
and verify that the SFP module and cables are securely connected. Use the
fibre channel loopback and the LC-LC connector to perform path diagnostics
SFP
Transceiver
Chapter 5. Installing and replacing devices
97