IBM N6270, Руководство по аппаратуре и обслуживанию

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Attention: You must perform a clean system shutdown before replacing
system components to avoid losing unwritten data in the nonvolatile memory
(NVMEM). The NVMEM LED is located on the controller module to the right
of the network ports, marked with a battery symbol. If the NVMEM LED is
flashing, there is content in the NVMEM that has not been saved to disk. You
need to reboot the controller module and proceed from the beginning of this
procedure. If repeated attempts to cleanly shut down the controller module fail,
be aware that you might lose any data that was not saved to disk.
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NVMEM LED
2. If you are not already grounded, properly ground yourself.
3. Turn off the power supplies, unplug the power cords from the power source,
and remove the power cords.
Opening the system
To access components inside the controller module, you must open the system.
Procedure
1. If you are not already grounded, properly ground yourself.
2.
Unplug the system cables and SFPs from the controller module, as needed, and
keep track of where the cables were connected. Leave the cables in the cable
management arm, so that when you reinstall the cable management arm in the
controller module, the cables will be organized.
3. Disconnect the right and left cable management arms from the controller
module. To release the arms, press the silver button on the power supply side
of each arm, and then remove the arm from the controller module.
LNK LNK
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Figure 17. NVMEM LED
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IBM System Storage: N6200 Series Hardware and Service Guide