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Troubleshooting
This chapter lists various troubleshooting options available when using the UCS-SCU application.
UCS-SCU Issues and Solutions
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No USB Disk on Key detected
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Selected disk has MBR partition table. On EFI systems, Windows can only be installed to
GPT disks.
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The OS installation process is interrupted and the server is rebooted.
Determine the value set for the Watchdog Timer. The Watchdog Timer is a new feature in the BIOS
of the C-series servers. If this feature is enabled and the value is set for a time duration that is less
than the time needed to install the OS, then the OS installation process is interrupted. This Watchdog
Timer feature automatically reboots or powers off the server after the specified time duration. Before
you begin the OS installation process, disable the Watchdog Timer feature.
UCS-SCU displays the following message even after mapping the virtual USB or connecting the
physical USB:
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For USB devices mapped through vmedia, try selecting the USB reset from the vmedia GUI
(virtual media session -> details -> USB reset)
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For a physical USB device, check the vendor and product information or try a different device.
After installing Windows OS, the KVM mouse does not work and Windows Device Manager
displays a yellow bang for the USB human interface device.
Check the version of CMC. Ensure that you have the latest version of CMC installed on your server.
Windows installation fails and the following message is displayed:
The EFI CD ROM device for the virtual drive was used to boot the Windows 2008 image. Use the
CD ROM device from BIOS CD ROM order.
After installing the Windows operating system through UCS-SCU, Windows Device Manager
displays some devices with a yellow bang.
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The device may not be in the Cisco support matrix.
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You may not have selected some device drivers in the SCU GUI.
Windows setup fails with BSOD 0x7B (inaccessible boot device).
You may not have selected the device driver for boot controller in SCU GUI.
CMC change does not reflect in UCS-SCU immediately.
C H A P T E R
Cisco UCS Server Configuration Utility, Release 5.0
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