See below for
diskutil list of my 3TB fusion drive (iMac 27" late 2014) running High Sierra: I assume
disk0 is the HD and
disk1 is the SSD, and
disk2 is the virtual combo that is mounted as my "HD". But I've got a 2 questions:
Apple_CoreStoragepartitions? I'd like to do a clean install of Mojave for my upgrade, and if the partitioning is wrong, how do I fix? I assume erasing the disk as part of the upgrade won't change the partitioning. And partitions 2 and 4 are not adjacent, so not clear how I'd merge. And Disk Utility just shows a single 3.1TB drive. Or should I not care?
When I mount and look at the EFI partitions on Disk0 and Disk1, I just see an Apple sub-directory... no Windows/Microsoft anything. And the Startup Disk Utility also only shows "Macintosh HD / MacOS 10.3.6" as an option. But when I boot up holding down Option key, I see a Windows boot option. Where is this boot option hiding?
**/dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER** 0: GUID_partition_scheme *3.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_CoreStorage Macintosh HD 2.2 TB disk0s2 3: Apple_Boot Recovery HD 650.1 MB disk0s3 4: Apple_CoreStorage Macintosh HD 801.4 GB disk0s4 5: Apple_Boot Boot OS X 134.2 MB disk0s5 **/dev/disk1 (internal, physical): #: TYPE NAME SIZE IDENTIFIER** 0: GUID_partition_scheme *121.3 GB disk1 1: EFI EFI 209.7 MB disk1s1 2: Apple_CoreStorage Macintosh HD 121.0 GB disk1s2 3: Apple_Boot Boot OS X 134.2 MB disk1s3 **/dev/disk2 (internal, virtual): #: TYPE NAME SIZE IDENTIFIER** 0: Apple_HFS Macintosh HD +3.1 TB disk2 Logical Volume on disk1s2, disk0s2, ... F8575B66-EA8C-4260-96E8-7FEFD183EFC3 Unencrypted Fusion Drive
CoreStorage Logical Volume Groups | +-- Logical Vol Group 8AAC.. ===== Name: Macintosh HD Size: 3.1 TB | +- Phys Vol 1ADA.. | Index: 0 | Disk: disk1s2 | Size: 121.0 GB +- Phys Vol 37D1.. | Index: 1 | Disk: disk0s2 | Size: 2.2 TB +- Phys Vol CFB5... | Index: 2 | Disk: disk0s4 | Size: 801.4 GB +- Logical Vol Family A061.. --- | | +- Logical Vol F857.. | Disk: disk2 | Size (Tot): 3.1 TB | Revertible: No | LV Name: Macintosh HD | Volume Name: Macintosh HD | Content Hint: Apple_HFS LVG | Type: Fusion, Sparse