Turning the memory expansion module on and off
This topic explains how to turn the memory expansion module on and off.
Because the memory expansion module is controlled by the server, turning on the
memory expansion module refers to connecting the memory expansion module
power cord into the power source and pressing the power-control button on a host
server that is connected to the memory expansion module and is configured to
identify the expansion module. Normally, the operating system on the server starts,
and the server issues a power-on request to the memory expansion module. The
memory expansion module is turned off only if the connected server issues a
power-off request, and you have disconnected the memory expansion module
power cord from the power source. You cannot turn off the memory expansion
module manually.
Statement 5
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current from
the device, ensure that all power cords are disconnected from the power source.
1
2
You can disconnect the memory expansion module power cords from the power
source to shut off all power immediately without damaging the memory expansion
module, but it might cause an unrecoverable error and loss of data on the
connected server.
Memory expansion module internal connectors and buttons
This section provides illustrations showing the internal connectors and buttons on
the memory expansion module system-board tray.
The illustrations in this section show the internal connectors and buttons on the
memory expansion module system-board tray. The illustrations might differ
slightly from your hardware.
34 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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