Chapter 5: System Maintenance
5.2
Replacing Controller Module
Components
5.2.1
Controller Module Maintenance Overview
It is not recommended to re-use the DIMM module in a failed
controller unless a similar RAID subsystem is nearby and can be
used to test the DIMM module.
Controller module can be replaced online only with a dual-
controller configuration. For single-controller configuration, F16F-
S4031, controller failure will result in interruptions to service.
When replacing the controller module, always remember that the
controller board is one of the most sensitive components in the
subsystem. All previously stipulated safety precautions (see
Section 2.3
) must be strictly adhered to. Failure to adhere to
these precautions can result in permanent damage to the
controller board, resulting in lengthy delays.
If one (1) controller fails in a dual-controller configuration, a
transparent failover to the partner controller automatically takes
place so that service is not interrupted. When the failed controller
is replaced, a transparent failback will ensure that the I/O
workload is once again distributed between the partner
controllers.
5.2.2
Removing the Controller Module
To remove the controller module:
Step 1.
Disconnect all cables
from the controller module. These
include the Ethernet cable connected to the Ethernet port,
Fibre Channel host links, and any cables connected to the
serial ports.
Step 2.
Remove the retention screws
that secure the controller
ejection levers to the chassis. (See
Figure 5-1
)
Replacing
Controller Module Components
5-3
