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EonStor U16U Installation and Hardware Reference Manual
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5.3.3 Replacing a Failed Controller Module
A controller module can fail for a variety of reasons: either the controller board has
sustained serious damage or the host IO board has been damaged in some severe way. In
either instance it is necessary for the user to replace the entire controller module. To
replace a failed controller module please follow these steps:
If a controller module has been damaged but the optional BBU (if installed), the BBU
charger board and the DIMM module have not incurred any damage, they may be reused
in the new controller module.
For instructions on how to replace a controller module, please follow these steps:
Step 1. Turn the subsystem power off – If the controller module has failed, it is
Step 2. Disconnect all the Cables – There may be a number of different cables attached
Step 3. Loosen the retention screws - The controller module is secured to the enclosure
5-4
Prior to replacing the controller module it is imperative for your own safety and
that of the subsystem that no power is being supplied to the system.
necessary to turn the power off. To do this, flip the power switches on both PSU
modules to an off position.
to the controller module. These cables could include SCSI cables for host
connection, RS-232C cable for serial port connection and an Ethernet cable for
LAN connection. Prior to removing the controller module all these cables should
be removed.
with a two, hand retention screws. Loosen these screws by turning them in an
anti clockwise direction. (See Figure 5-1)
Controller Module Maintenance
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