IBM 8852 User Guide - Page 55

Chapter 6. Shared BladeCenter resources The BladeCenter unit provides resources that are available to most blade servers at all times, such as power modules, cooling, system management, and network I/O modules; no user intervention is required. Some resources are selectable for use by a single blade server at a time, such as the media tray or the keyboard-videomouse (KVM). You can select the resources for a blade server in the following ways: Attention: Do not switch ownership of the media tray to another blade server while a transaction is taking place on the optical drive or an attached USB device. The data might become corrupted. Make sure that activity lights on the optical drive are not lit. v Most blade servers have two selection buttons on the front of the blade server CD and . v You can use the management-module Web interface to enable or disable the select buttons on the blade servers and change ownership of the media tray or the KVM (Blade Tasks → Remote Control). The monitor that is attached to the management module shows the video output from the blade server that is the current owner of the KVM. When there is no actively selected video from any blade server, the video from blade server 14 is routed to the management module. While the management module is restarting, there is temporarily no current KVM owner. The video from blade server 14 is displayed on the monitor briefly until the management module uses its NVRAM values to reestablish ownership of the KVM and media tray (optical drive, diskette drive, and front panel USB ports). After that, the video from the blade server that is the current KVM owner is displayed on the monitor. - To switch the KVM to a specific blade server, press the blade server. button on that - To switch the media tray to a specific blade server, press the CD button on that blade server. The management module assigns the resource to the blade server that is requesting it. v On a keyboard that is directly attached to the management module, you can press keyboard keys in the following sequence to switch KVM control between blade servers: NumLock NumLock blade_server_number Enter Where blade_server_number is the two-digit number for the blade bay in which the blade server is installed. When using some keyboards, such as the 28L3644 (37L0888) keyboard, you must hold down the Shift key while you enter this key sequence. It can take up to 20 seconds for the operating system in the switched-to blade server to recognize the media tray or the KVM. If you install Microsoft Windows 2000 on a blade server while it is not the current owner of the media tray or the KVM, the first time the blade server requests ownership after the operating system has been installed, it can take up to 1 minute for the operating system to recognize the devices (this is a one-time-only occurrence). © Copyright IBM Corp. 2010 39