PS6500 Hardware Maintenance Maintaining Control Modules
3-7
Figure 3-6: Installing a Control Module
4. Rotate each latch toward the array until the latches are closed and the control module is completely seated in
the slot.
5. Connect the network cables to the control module. See Network Requirements and Recommendations on
page 3-10 for examples of network configurations. Use the cable management system to organize the network
cables. See Using the Cable Management System on page 1-10 for information.
6. If the array was shut down, turn on power to the array. See Turning on Power to an Array on page 1-13.
7. Make sure the control module is operational. See Interpreting Control Module LEDs on page 3-1.
If two control modules are installed but only one appears in the GUI or CLI, the control module may not be
properly installed. Re-seat the control module. If both control modules still do not appear in the GUI or CLI, they
may not be running the same firmware, and you should contact your PS Series array service provider.
Note: When connected, a control module cache battery may begin to charge. If the low-battery-safe cache policy
is enabled (the default), the array will operate in write-through mode until the cache battery is fully charged.
However, if you need optimal performance before the battery is fully charged, as soon as the battery status
is
good/charging, you can temporarily disable the low-battery-safe policy and force the array to operate
in write-back mode. Make sure to re-enable the low-battery-safe policy when the battery is fully charged.
See the Group Administration manual for information about cache policies.
Replacing the MicroSD Card
Each control module includes a microSD card containing the PS Series firmware. If a control module fails, remove
the microSD card from the failed control module and install the card in the replacement control module. This will
make sure that the new control module is running the correct firmware.
You can access the microSD card by sliding the control module partially from the slot. If you completely remove
the control module, place it on a surface that is protected from electrostatic discharge.
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