USB mass storage device oddness

[Nate Lawson]

The important part of your error message is "Medium not present".
Obviously, when you insert the flash reader into the USB port without any
flash media in it, that is the right error to return.  I believe our umass
driver and/or your reader do not generate the proper CAM event when the
media is inserted.

The easy workaround is to always insert the flash in the reader and then
the reader into the USB port.

-Nate