IBM XSERIES 255 TYPE 8685, Руководство по техническому обслуживанию и ремонту

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LEDs for Active PCI slots
Each Active (hot-plug) PCI slot has two LEDs associated with it: one Power-on LED
and one Attention LED. The illustration in “System-board LED locations” on page 47
shows the location of these LEDs.
Power-on LED
This LED is on when the hot-plug PCI slot has power. An adapter must not
be added to or removed from the PCI slot when the Power-on LED is on.
When this LED is off, the hot-plug PCI slot has no power applied. An
adapter can be added to or removed from the PCI slot when the Power-on
LED is off.
See your operating-system documentation to determine if your operating
system supports hot-plug PCI adapters and, if so, how to disable the
hot-plug PCI slot.
Attention LED
Each hot-plug PCI slot has an Attention LED that can be seen from inside
the server.
An Attention LED flashes approximately once per second when it is on. The
meaning of the Attention LED is defined by your operating system. See
your operating-system documentation to determine if your operating system
supports hot-plug PCI adapters and, if so, what the Attention LED indicates.
The following table describes the Power-on and Attention LEDs.
Power-on LED Attention LED Description and action
On Flashing The adapter requires attention. The slot still
has power applied. Do not remove or install
an adapter in the slot. See your
operating-system documentation for
instructions.
On Off Normal operation; no intervention is
required.
Off Flashing The adapter requires intervention. Power is
removed from the slot. An adapter can be
removed or installed in the slot.
Off Off Power is removed from the slot. An adapter
can be removed or installed in the slot.
Power-supply LEDs
The ac and dc power LEDs on the power supply provide status information about
the power supply. The following illustration shows the location of the ac and dc
power LEDs.
Chapter 3. Diagnostics
31