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realtwang Level 1 (95 points)

I have been having an issue with Mavericks unmounting my external USB disk suddenly, followed by a Finder notification that the disk was ejected improperly.  This has only started since upgrading to 10.9.  I have tried unchecking "Put hard disks to sleep when possible" in System Prefs, but it has not helped.  Weirdly, the drive icon does not disappear from the desktop when this happens, so I don't know if it's actually ejecting, or if the system just thinks it is.  At any rate, it does appear to be a bug.

MacBook Pro (17-inch Early 2011), OS X Mavericks (10.9), 8GB RAM
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