I'm driving along to work this morning and the player gets this little "W + drive busy" icon in the corner and stops playing. I let it sit for a little while, but it stays there, not playing. So I pull it out of the sled for a moment, push it back in, and it gets the "Failed to unmask IDE" error message when it boots up. I've never seen that message on this unit before. (It's a Riocar 20GB from the "Fire Sale" last Dec.)

There's no battery icon to indicate low power, I'm cruising along at 65mph on the interstate, so the engine/alternator/whatever should be going full-bore. (And I just had to buy a new battery about three months ago.)

I'll check the wiring when I have a chance to make sure nothing's come loose, and I'm busy rsync'ing off the data partition in case I want to try to run any HD tests on the drive.

But if it were a voltage problem, shouldn't I have seen the battery icon pop up?

Does anyone have any other ideas what could cause this message?