IBM LS20 - BladeCenter - 8850 Service Manual page 19

If you install a supported Microsoft Windows operating system on the blade server
while it is not the current owner of the keyboard, mouse, and video, a delay of up to
1 minute occurs the first time you switch the keyboard, mouse, and video to the
blade server. During this one-time-only delay, the blade server device manager
enumerates the keyboard, mouse, and video and loads the device drivers. All
subsequent switching takes place in the normal keyboard/video/mouse switching
time frame (up to 20 seconds).
CD/diskette/USB select button: Press this button to associate the shared
BladeCenter unit removable-media drives and USB ports with the blade server. The
LED on the button flashes while the request is being processed then is lit when the
ownership of the removable-media drives and USB ports has been transferred to
the blade server. It can take approximately 20 seconds for the operating system in
the blade server to recognize the removable-media drives and USB ports.
The operating system in the blade server must provide USB support for the blade
server to recognize and use the removable-media drives and USB ports. The
BladeCenter unit uses USB for internal communication with these devices. If there
is no response when you press the CD/diskette/USB select button, you can use the
management-module Web interface to determine whether local control has been
disabled on the blade server.
Activity LED: When this green LED is lit, it indicates that there is activity on the
hard disk drive or network.
Location LED: When this blue LED is lit, it has been turned on by the system
administrator to aid in visually locating the blade server. The location LED on the
BladeCenter unit will be lit also. The location LED can be turned off through the
management-module Web interface or through IBM Director Console.
Information LED: When this amber LED is lit, it indicates that information about a
system error for the blade server has been placed in the Management Module
Event Log. The information LED can be turned off through the management-module
Web interface or through IBM Director Console.
Blade-error LED: When this amber LED is lit, it indicates that a system error has
occurred in the blade server. The blade-error LED will turn off only after the error is
corrected.
Power-control button: This button is behind the control panel door. Press this
button to turn on or turn off the blade server.
Note: The power-control button has effect only if local power control is enabled for
the blade server. Local power control is enabled and disabled through the
management-module Web interface.
Power-on LED: This green LED indicates the power status of the blade server in
the following manner:
v Flashing rapidly: The service processor (BMC) on the blade server is
handshaking with the management module.
v Flashing slowly: The blade server has power but is not turned on.
v Lit continuously: The blade server has power and is turned on.
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Chapter 1. Introduction