The virtual USB interface is not supported on VMware. The following are examples of differences in external media support between MCS servers and Cisco UCS B-Series Blade Servers:
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Install logs cannot get dumped to a USB key. These logs get dumped to a file through the serial port of the VM.
•The answer file generated by the Answer File Generator (platformConfig.xml) cannot get read from a USB key to perform an unattended installation.
Instead, you must put the answer file into a FLP image to be mounted in the floppy drive.
•USB tape drive backup is not supported. Use SFTP instead.
•Music On Hold through a USB connection is not supported. Use a Cisco 7800 Series Media Convergence Server instead.
•Cisco Messaging Interface (CMI) for Message Waiting Indication (MWI) is not supported over the serial port. Use a Cisco 7800 Series Media
Convergence Server instead.