virtualbox.org

Hi,
I have setup VirtualBox (4.1.8 with extension pack) so that it catches my external usb harddisk (jmicron samsung story station).
The success of this is very intermittent. When my Mac (Lion 10.7.2) is freshly booted it works, other times it does not and my Mac keeps catching the usb port.
I do not reboot often and would not like to start either.
So, how do I unload the VB kernel module and reload it again, or more precisely what do I need to reload for usb to work in VB again so I don't have to reboot Mac OS X.

My guest OS is ubuntu 11.10 server.

Thanks for your understanding and patience.

Alex

To keep the Mac host from grabbing the USB storage device use:

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sudo kextunload /System/Library/Extensions/IOUSBMassStorageClass.kext

This will disable all USB storage media temporarily!

When you are finished using the USB storage device in VirtualBox, shut it down, and then do a

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sudo kextload /System/Library/Extensions/IOUSBMassStorageClass.kext

to restore the USB storage functionality in the host.

Thank you, that did the trick partially. In addition to doing this I also had to reinstall VirtualBox with the extension pack, now it works.
Any idea how I can manually unload and load the VBox.kext's. I can unload,
but when I try to load as per

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sudo kextload -b org.virtualbox.kext.VBoxUSB

for example, it won't.
Also loading the kext directly from

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/Library/Extensions/

with

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sudo kextload VBoxUSB.kext

gives errors about dependency problems.

Anyway I guess I could just keep reinstalling VBox every time it flakes out.

Thanks for your help.
Alex

virtualbox.org

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