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100 U41243-J-Z156-1-76
Boards in hot-plug PCI slot System expansions
After a new PCI board is installed, the locking mechanism must be rotated back
into place to activate the microswitch and secure the board in the slot (figure 26
on page 99/PCI slot activated). If an attempt is made to pull out the related
board despite the green LED being lit, the microswitch disconnects the slot from
the power supply to protect the board and system from damage.
The hot-plug function is not supported by the operating systems such as
Windows NT 4.0, Windows 2000 and SCO UNIX Ware (supported by NetWare
5.0). To nevertheless already make the hot-plug function partially available
under Windows NT 4.0 and Windows 2000 PCI hot-plug utility is provided with
the server start-CD which enables the necessary function for the swapping of
PCI boards of same (hot-swap) type (see section “Installing PCI hot-plug
software” on page 72).
LED indicators
The following table shows the possible display modes and their meaning:
Voltage
indicator
(green)
Warning
indicator
(yellow)
Status description
OFF OFF Emergency-off status
The PCI slot locking mechanism was loosened
without the intervention of the operating system.
The slot is powered down and disconnected from
the PCI bus.
OFF ON Hot-plug status
There are two different reasons for this status:
● A board is installed in this slot. The board has
been powered down and disconnected from the
PCI bus. It can be removed from the slot without
danger.
● No board is installed in this slot. If a board has
been removed under monitoring by the PCI hot-
plug utility, then a new board of the same type
can be installed.
Table 26: LED status indicators