I'm trying to create a partition on my iMac's 3TB Fusion Drive, but Disk Utility keeps issuing the error:
"The provided Core Storage logical volume has an incorrect size. You should run whole-disk repair.
Operation failed..."
So I run First Aid and everything's OK. I get the same error when I try again. I also tried running fsck from single-user mode. Again, with no avail.
I previously had a second partition, and had recently deleted it. Not sure if that matters. But at least I know that partitioning had worked before on this drive. So it's something that Disk Utility messed up.
What's up with Disk Utility's inability to repair something that it breaks?