Not able to safely remove external disk after having mounted and unmounted a VHD on it

Posted by Agnel Kurian on Super User See other posts from Super User or by Agnel Kurian
Published on 2014-05-30T08:08:44Z Indexed on 2014/05/30 9:31 UTC
Read the original article Hit count: 234

Filed under:

windows-7

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usb

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external-hard-drive

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mount

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unmount

I am using Windows 7 SP 1. I have an external hard disk (Seagate 500GB) which I am able to use without problems most of the time. I am able to plug it in, use it and then safely unmount it via the "Eject USB Mass Storage Device" option in the taskbar tray.

However, if I attach a VHD file located on this disk using "Disk Management", then detach the VHD and finally try to safely disconnect the disk via the system tray, I get an error which says: "Problem Ejecting USB Mass Storage Device: Windows can't stop your 'Generic volume' device because a program is still using it. Close any programs that might be using the device, and then try again later."

How do I avoid this problem? Which process could still be accessing the device (even after I have closed the "Disk Management" application) ?

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