Acer Altos R920 Series - Manual (Page 77)

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Removing and installing a PCI card
Important: Only PCI add-in cards in PCI slots 1 and 2 are
hot-pluggable. If you are installing or removing a PCI card from
PCI slot 3 through 7, see page 82 for more information.
Caution: Expansion slot covers must be installed over all vacant
slots to maintain the electromagnetic emission characteristics of
the server and to ensure proper system cooling.
Determining PCI slot status
The PCI slots 1 and 2 have a LED indicator to display the PCI hot-plug
status. For more information on how to determine the slot status, refer
to “Hot-plug PCI Express slot LED indicators” section on page 25.
To remove a hot-plug PCI card with OS hot-plug interface:
1 Perform the pre-installation instructions described on page 39.
2 If you are using a Microsoft Windows operating system, double-
click the Unplug/Eject icon in the taskbar to open the Unplug or
Eject Hardware menu.
3 Select the device to be removed and click Stop.
4 Make sure that the power LED on the rear of the PCI slot is turned
off before disconnecting any cables attached to the card.