A bug in the ehci-hcd USB driver in the ESX Server service console can cause programs that try to access USB CD-ROMs or floppy drives to stop responding.
To work around this problem:
Log in to the service console as root.
Use a text editor to open the file /etc/modules.conf . For example
nano /etc/modules.conf .
Add # to the beginning of the line that contains ehci-hcd .
Save and close the file.
Reboot the ESX Server host.
Based on VMware KB 1003164