Core Storage merging

[casperes1996]

So I've accidentally created two logical volume groups, instead of two logical volumes on my internal HDD, and I was wondering if I could simply merge the two groups, keeping the volumes two partitions on the physical drive?
Furthermore, i'd like to shrink the one logical volume to grow the other, but that should be fairly simple once they're in the same group.

 

[Weaselboy]

I know you can merge regular partitions using the diskutil command, but from looking at the core storage section of the command at the manual page here, I don't see a command to merge core storage volumes. I think you will need to revert them and then change things.

 

[casperes1996]

I know you can merge regular partitions using the diskutil command, but from looking at the core storage section of the command at the manual page here, I don't see a command to merge core storage volumes. I think you will need to revert them and then change things.

Problem with that is that reverting them would cause me to lose data. The one volume group has its own boot entry point.
Core Storage has a few commands that aren't in the man pages though. I've used some in the past that are undocumented, so maybe someone else on here knew something.