The full size of the Fusion Drive is not available for repartitioning Any help would be greatly appreciated, I've found so many similar questions but none that match mine exactly.

I created a partion on my 2013 iMac in order to test out the Yosemite upgrade. I decided to proceed with the upgrade from current Mavericks 10.9.5 but now I'm unable to reclaim the space dedicated to the Yosemite install, 1.5TB (half of my HD).

System info

GRAPHIC NVIDIAGeForceGTX775M 2GB GDDR5

PROCESSOR  3.5GHz Quad‑core Intel Core i7

MEMORY 32GB 1600MHz DDR3 SDRAM‑4X8GB

HARD DRIVE  3TB Fusion Drive

I was able to delete the partion, but the space allotted to it in disk utility is greyed out, and there is no drag to resize option for my remaining HD. 


Ive tried in safe mode and recovery mode.
I've verified and repaired all disk permissions to no avail.


1) Has anyone successfully reclaimed entire HD after partitioning a Fusion drive

2) Based on the output below can someone help me identify the partition I created by either a UUID or Identifier? I've found many instructions online but dont know which disk/volume I should be attempting to resize/delete.
Run the following command in Terminal: diskutil cs resizeStack ACA4133B-5F31-4D66-B502-4EABED4E2958 5E6D00FD-4BAD-424C-92CF-F8080CCC2C95 3.128t

The first UUID is your LV UUID, the second is the PV UUID that you want to grow (incase I mistyped one of them).

This will grow your disk back to fill up your 3TB disk. You may have to reduce that number to 3.1279t or something though. 3.128t should work. Unfortunately, you can't specify 100% like you can with many commands.