External HDD Unlock

First off Eddie, Thank you very much for your posts. I have a 2011 Imac with a 256 SSD and a 2 TB HDD. While fooling around with boot camp and various other partions I made the mistake of not decrypting my HDD. I really made a mess of my HDD and couldn't partion it back to the way I had it.

I can confirm the terminal commands given by Eddie do infact work on a second internal drive as well. Thanks to these terminal commands and Time machine my Imac is back to the way it was.🙂

Just in case anyone has the same question as bill.mcd --- from Recovery Mode's main screen (where you selected Disk Utility), you can go to the Utilities menu and select Terminal.

If you're already in Disk Utility, quit out of that, and it'll take you back to the main screen -- then select Utils > Terminal.

Hi Tubby007, I have the same problem. I had a clean installation of OS X. After that, my seagate external HD (was encrypted) got messed up and I cannot do anything about it from disk utility UI tool. And I saw this message "his patition contain a locked disk and can not be resized until it is unlocked" in Disk Utility." However all my backup files on the seagate external HD. Were you able to fix the external HD AND recover all the files on it? Many thanks!

It's over three years since you answered this query......but I've had a similar problem, I followed your instructions and HEY PRESTO! my Formac external drive re-appeared on my desktop.

So many thanks, Eddie, for your expertise.

I have the same issue but if possible I'd like to recover the data on the drive. Is there any way to do that with your method? here is what I get when inputing the first command.

I've tried the suggestions here, but it snot working for me. However, I think my issue is different. Can someone take a look?

https://discussions.apple.com/thread/5583730

I'm having this exact problem. All options are grayed out in disk utility

This solution is a much better approach than grabbing the disk and using a partition tool on another machine. Thank you, worked for me. (This is for the solution Eddie Yam posted.)

Eddie's solution worked for me too. Took me about an hour to find this thread, and 2 minutes to regain access to my HD. Thanks!

Thank you Eddie, that helped. Also, I was using the wrong command, I had to type in "diskutil corestorage delete 6B885E57-6D7E-4CB6-B2AA-507DD9A58BE2" Thank you very much for your quick reply.

You saved my 1.5 tb external HDD. Thanks.

Hey man look I'm sorry to ask but could you post step by step for me I have no idea what to do all I wanna be able to do is use the hdd again, thanks

Sorry my typo, first command should be "disktil corestorage list" (without quotes)

IT WORKED YOU ARE A GOD!!!!!!!!!! THANKS FOR HELPING ME SO MUCH MAN, I CAN FINIALLY GET SOME DATA SAVED AGAIN. ONCE AGAIN THANK YOU SO MUCH.