I installed Yosemite on an external 3TB drive. I made a specific 300GB partition on it to hold the system and a second for data. Installation worked fine. However, according to Disk Utility in both Mavericks and Yosemite there is only a little more than 800GB available on the whole disk.
When I run
diskutil list; echo; diskutil cs list it says there are no CoreStorage Volumes, but I knew from the Yosemite installation that there is one.
How can I get rid of the CoreStorage Volume even as OS X won't acknowledge there is one? Do I dare to delete and erase the complete drive from Disk Utility in Mavericks? It seems risky as it can't even show me the lost partition space.
Here's the output:
/dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *801.6 GB disk2 1: EFI EFI 209.7 MB disk2s1 2: Apple_HFS X Drive 320.1 GB disk2s2 3: Apple_Boot Recovery HD 650.0 MB disk2s3 No CoreStorage logical volume groups found