We have all heard the admonition about safely removing USB devices when we are done with them, but what if an operating system is suspended and you decide to simply unplug the USB device then and there anyway?
While there are indeed no transfers going on, the reason you do the Safely Remove Hardware dance is not because of the transfers. You are doing this to cleanly unmount the file system. Programs may still be using the USB drive and some files may still be unwritten to the disk, even after the application using them is closed. This is the same reason why you do not just hibernate and switch operating systems. A mounted file system is never guaranteed to be in a consistent state.
Ever wondered why an operating system slowed down to a crawl when using floppies? It is because the cache was flushed after writing each sector so that the floppy could be removed at any time when not in use.
You will still get a dialog pop-up and your program will hang if you try to access a floppy that was removed behind your back. Just insert the floppy back and be done. This will not work with USB drives because they get a different identifier each time. The program will just crash and the operating system may too if a driver was accessing a file.
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