Fusion Drive trouble In trying to resize a bootcamp drive, I managed to get myself in a lot of trouble.  I've successfully managed to get my computer running again, but now I've lost some HD space and I can't resize or remove any of the partitions except for the bootcamp volume.  Any help is very much appreciated.  I am willing to wipe the entire drive and start over with my TM backup, but I can't seem to get the Fusion drive to even allow reformat while in Recovery Mode.

iMac:~ hellman$ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage Mac HD                  121.0 GB   disk0s2
   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3

/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:          Apple_CoreStorage Mac HD                  2.1 TB     disk1s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3
   4:       Microsoft Basic Data BOOTCAMP                99.0 GB    disk1s4
   5:          Apple_CoreStorage                         402.0 GB   disk1s5
   6:                 Apple_Boot                         134.2 MB   disk1s6
   7:                  Apple_HFS Hell Baby               398.8 GB   disk1s7
   8:                 Apple_Boot Recovery HD             650.0 MB   disk1s8

/dev/disk2 (internal, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           +2.2 TB     disk2
                                 Logical Volume on disk0s2, disk1s2
                                 B7F7A5D5-EF16-4221-9630-CF4C93618955
                                 Unencrypted Fusion Drive

iMac:~ hellman$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group D1C81059-65FF-4528-B862-9C93152602EC
    =========================================================
    Name:         Mac HD
    Status:       Online
    Size:         2219635531776 B (2.2 TB)
    Free Space:   16384 B (16.4 KB)
    |
    +-&lt; Physical Volume 82570857-4FBF-4E5F-ACEA-043B49F9317A
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     120988852224 B (121.0 GB)
    |
    +-&lt; Physical Volume BE84AD9C-B121-4900-827B-F882607AEFF2
    |   ----------------------------------------------------
    |   Index:    1
    |   Disk:     disk1s2
    |   Status:   Online
    |   Size:     2098646679552 B (2.1 TB)
    |
    +-&gt; Logical Volume Family CA8476E4-5B44-48C4-BC88-10B68F99FC04
        ----------------------------------------------------------
        Encryption Type:         None
        |
        +-&gt; Logical Volume B7F7A5D5-EF16-4221-9630-CF4C93618955
            ---------------------------------------------------
            Disk:                  disk2
            Status:                Online
            Size (Total):          2213780258816 B (2.2 TB)
            Revertible:            No
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS
            LVG Type:              Fusion, Sparse
Solved: I used an Apple support link that gave me keystrokes in diskutil to re-map the Fusion Drive in Terminal.  I was able to reclaim all disk space and I'm reinstalling from my Time Machine back up now:

https://support.apple.com/en-us/HT207584