Lost about 30-40GB of free storage due to failed manual partition creation

Hello everyone,

This morning I ran Boot Camp once again (, as I hadn't figured it out completely so far) on my rMBP (OS X 10.10) with 120GB of flash storage and successfully created the bootable USB drive as well as the corresponding partition.

After the automatic reboot, I deleted the created partition to recreate one manually in ExFat format in order to prevent any errors I had encountered previously.

During the manual creation (via Disk Utility) of this partition, my MacBook restarted (I don't know if it does that ordinarily). After this restart, I had some problems with black screens but resolved those by just restarting the MacBook twice, and the strange thing is that the partition that should have been created manually by me was missing and almost all of the storage that I had freed for the partition was gone/lost.

So, now my question, of course, is: Where could this storage have gone and how am I able tor recover it to finally install Windows 8.1 on my Mac?

In another thread where someone seems to have a similar problem, someone named Loner T asked for some outputs of certain commands, so I have them prepared for anyone who's interested in those:

diskutil list:

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         120.5 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *120.1 GB   disk1
                                 Logical Volume on disk0s2
                                 8A9F17FA-B121-416B-87CB-1328C7EE5E93
                                 Unlocked Encrypted
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *15.6 GB    disk2
   1:                 DOS_FAT_32 WININSTALL              15.6 GB    disk2s1
/dev/disk3
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk3
   1:                        EFI EFI                     209.7 MB   disk3s1
   2:                  Apple_HFS INTENSO                 949.9 GB   disk3s2
   3:       Microsoft Basic Data BOOTCAMP                50.0 GB    disk3s3

diskutil cs list:

CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 215EA80D-5666-4C00-AD6D-37FF4C0560ED
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         120473067520 B (120.5 GB)
    Free Space:   9510912 B (9.5 MB)
    |
    +-< Physical Volume 27307182-A3B9-4F87-9B20-06B7E38C9D1E
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     120473067520 B (120.5 GB)
    |
    +-> Logical Volume Family C1AFBCDB-243F-4564-BDA6-F0B2845604B3
        ----------------------------------------------------------
        Encryption Status:       Unlocked
        Encryption Type:         AES-XTS
        Conversion Status:       Complete
        Conversion Direction:    -none-
        Has Encrypted Extents:   Yes
        Fully Secure:            Yes
        Passphrase Required:     Yes
        |
        +-> Logical Volume 8A9F17FA-B121-416B-87CB-1328C7EE5E93
            ---------------------------------------------------
            Disk:                  disk1
            Status:                Online
            Size (Total):          120101797888 B (120.1 GB)
            Conversion Progress:   -none-
            Revertible:            Yes (unlock and decryption required)
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS

sudo gpt -vv -r show /dev/disk0:

gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176
gpt show: /dev/disk0: PMBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 236978175
      start       size  index  contents
          0          1         PMBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6         
         40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640  235298960      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
  235708600    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  236978136          7         
  236978143         32         Sec GPT table
  236978175          1         Sec GPT header

sudo fdisk /dev/disk0:

Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]
Signature: 0xAA55
         Starting       Ending
 #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
------------------------------------------------------------------------
 1: EE 1023 254  63 - 1023 254  63 [         1 -  236978175] <Unknown ID>
 2: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
 3: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
 4: 00    0   0   0 -    0   0   0 [         0 -          0] unused

Any help is greatly appreciated!