I can't see my hard drives partition more :-/

Hello

I can see is no longer a partition that I had on an external drive. I know that this probably isn't the best thing to do, but I had a backup time machine on this partition (such as one on my hard drive to the Mac).  I think I've ejected the drive not correctly once, and since the partition of time machine no longer appears

Disk utility does not launch or that hard drive is plugged so I can't reformat it even :-/

If anyone knows any more options?

Thank you very much

Nick

You can try to disconnect your external drive, reboot into Recovery Mode (command-R), and OS X Utilities launch disk utilitymenu, connect your external drive and see if you can format.

I purchased Drive Genius 4 OWC (Macsales.com) and had something similar happens where I could see all the partitions on the external drive but could not repartition or delete one of them. With Drive Genius, I was able to repartition and format. So, you might need a 3rd party app like Disk Warrior and Drive Genius (trial download) to manipulate your external drive.

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