MacBook Pro won't recognize external hard drive; error during unencryption?
I have a Seagate external HD with its own power source. I had previously formatted it extended journaled and turned on whole-disk encryption, but hadn't been using it. I wanted to add it as a second TimeMachine drive to my AirPort Extreme. I added a USB hub to the Extreme and plugged in the second drive, but it never showed up in Finder. (The first drive, also now plugged into the hub, was recognized and continues to work fine.)
So I plugged the second drive directly into my MacBook Pro. It showed up, I entered the encryption password, and then turned off the encryption. Finder showed no files on the drive, which I didn't think was correct, but couldn't remember for sure.
I ejected the drive and plugged it back into the hub plugged into the Extreme. It still didn't show up. So I again plugged it back into the MacBook Pro, and now it won't show up there either. When I plug the USB cable into the MacBook Pro, I can hear the drive spin up and the normal initial chatter, and its LED is on. So I believe the cable is good, and the drive is not broken in any gross way. I've shut down and restarted the MacBook Pro, which didn't solve the problem.
Any ideas? Is it possible that when I turned off the encryption, I should have waited longer before ejecting it, and somehow screwed it up? There was no progress window, message, or spinning cursor, and it ejected fine.
MacBook 15" Retina (2012), Mavericks. Thanks in advance.
MacBook Pro (Retina, Mid 2012), OS X Mavericks (10.9)