I have solved my problem, and I have recover my lost partitions, and all my data!
My solution here, try and let me know if it get fix for you too.
Add “/Volumes” into spotlight privacy (since ext HDs are mounted under this folder).
So open up terminal and enter: “open /Volumes”
The above command will open a finder window containing /Volumes. Drag and drop that folder into Spotlight.
After that connect again your hard drives with lost data and lost partitions.
They will probably still don’t mount, but you can go to the disk utility. You will see the partitions back but unmounted. Repair the hard drive, repair de partitions, try to mount them again… I had to try to repair two times and try to mount another couple of times… But finally I got my 2 lost partitons back!
My hard drive is a WD My Passport 1Tb with 3 partitions. Good luck!
