Whenever I eject the external drive that I use for Time Machine, I get this prompt:
However, in actual fact, this particular drive has got only ONE (1) partition, so it's rather annoying that I have to click on Eject All when this should have been a no-frills process.
Note that this does not happen if I simply connect the drive to the USB port and then eject it. It usually happens after a Time Machine backup session has occurred.
FYI, the backup drive I use is encrypted. Could this be the reason?
EDIT: In response @matthieu-riegler's question, this is the result I got from
diskutil list. As you can see, there's only one entry for the external drive, My Passport.