Replacing A Controller Module; Before You Begin; Verifying Component Failure; Controller Module Blank Inserted After Removing A Controller Module - Seagate Exos AP 4U100 Installation And Maintenance Manual

Replacing a Controller module

In a dual-controller configuration, controller modules are hot-swappable, which means you can replace one module
without halting I/O to disk groups, or powering OFF the enclosure. In this case, the second module takes over operation
of the storage system until you install the new module.
You may need to replace an Controller module when:
• The Fault LED is illuminated
• Logs or events in the firmware indicate a problem with the module
• Troubleshooting indicates a problem with the module

Before you begin

Removing a Controller module from an operational enclosure significantly changes air flow within the enclosure.
Openings must be covered for the enclosure to cool properly. If you need to replace a controller module, leave it in place
until the replacement is ready to be installed. If you need to remove the controller module in order to replace a
component on the controller or to remove a Storage personality module, you must insert a foam Controller module blank
in the Controller module slot and leave the blank in place until the controller module can be reinserted.
the Controller module Foam blank.
Blank inserted into a Controller module slot
Figure 90 Controller module blank inserted after removing a Controller module
If parts are stored in the Controller module blank, remove the parts before installing the blank in the Controller module
slot. If you are replacing both Controller modules in an enclosure, record configuration settings before installing the new
controller modules.
See "Removing a Controller module" (page
installing an additional controller module.

Verifying component failure

• Check Module Fault LED (No. 7 in
• Check Fault LED (See
106 Module removal and replacement
107), and
Figure 15)– front of enclosure: amber = Fault condition.
Figure 19)– back of enclosure on Controller module face plate): amber = Fault condition.
Controller module blank
"Installing an Controller module" (page 111)
Figure 90 shows
for instructions about