Hepatitan

Q: How to reset 3TB fusion drive to original partition scheme

When I first purchased my 27" iMac in early 2013 I was unable to use Boot Camp to create a Windows partition (with the version of OSX it shipped with bootcamp was initially disabled but added in an update later).  I found a guide online for untangling the Fusion Drive partitions and essentially setting up bootcamp manually.

 

However, a few days ago I had Windows 8 get screwed up and needed to reformat.  I figured that since Apple now updated Mavericks to allow my machine to use bootcamp I would start from scratch and do it properly.  The problem is, I cannot seem to get my machine back into a "factory default" setup.  I tried removing the CoreStorage volume and letting the Disk Utility tool "reset" the drive, and that -seemed- to work.  I had one 3TB partition (according to the GUI) and re-installed OSX.  I used Bootcamp to split 2TB for Windows (games) and leave 1TB for Mac.  Everything went fine and I restarted into the Win8 installer.  However, at this point Windows refused to install to the 2TB partition.  I tried formatting it, and delete/create but it said it couldn't install to that partition.  The confusing part is that according to Windows I had about 8 partitions (EFI and Recovery I understand but the rest I don't know the reason for).

 

So now I'm back at the OSX Recovery and this is what "diskutil list" is giving me.  Why are there all these 524.3 KB partitions?  I can't seem to remove or merge them.  I know I should have recorded what the original structure is, but it's too late now.  Can someone tell me what the 3TB Fusion Drive *should* look like, and how I can get back to that? 

 

bash-3.2# 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                         121.0 GB   disk0s2

   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3

/dev/disk1

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *3.0 TB     disk1

   1:                        EFI EFI                     209.7 MB   disk1s1

   2:          Apple_CoreStorage                         144.2 GB   disk1s2

   3:                 Apple_Boot Boot OS X               650.0 MB   disk1s3

   4:       Microsoft Basic Data                         2.1 TB     disk1s4

   5:          Apple_CoreStorage                         801.4 GB   disk1s5

   6:                 Apple_Boot Boot OS X               134.2 MB   disk1s6

/dev/disk2

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     Apple_partition_scheme                        *1.3 GB     disk2

   1:        Apple_partition_map                         30.7 KB    disk2s1

   2:                  Apple_HFS OS X Base System        1.3 GB     disk2s2

/dev/disk3

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Macintosh HD           *1.1 TB     disk3

/dev/disk4

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk4

/dev/disk5

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk5

/dev/disk6

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk6

/dev/disk7

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk7

/dev/disk8

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk8

/dev/disk9

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *6.3 MB     disk9

/dev/disk10

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *2.1 MB     disk10

/dev/disk11

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *1.0 MB     disk11

/dev/disk12

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk12

/dev/disk13

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *524.3 KB   disk13

/dev/disk14

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            untitled               *1.0 MB     disk14

 

 

Also including what my CoreStorage structure looks like...

 

IMG_0699.jpg

iMac, OS X Mavericks (10.9.2)

Posted on Apr 17, 2014 7:23 PM

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Q: How to reset 3TB fusion drive to original partition scheme

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  • Helpful answers

  • by Hepatitan,

    Hepatitan Hepatitan Apr 17, 2014 7:31 PM in response to Hepatitan
    Level 1 (0 points)
    Apr 17, 2014 7:31 PM in response to Hepatitan

    Since it won't let me edit my post, here is the text from the picture:

     

    CoreStorage logical volume groups (1 found)

    |

    +-- Logical Volume Group CB783377-EA29-4751-B149-FE6B210648B5

        =========================================================

        Name:         Internal Drive

        Status:       Online

        Size:         1066587906048 B (1.1 TB)

        Free Space:   12288 B (12.3 KB)

        |

        +-< Physical Volume 0221F6E1-8EE1-453A-A0EB-B32348EB6E53

        |   ----------------------------------------------------

        |   Index:    0

        |   Disk:     disk1s2

        |   Status:   Online

        |   Size:     144162512896 B (144.2 GB)

        |

        +-< Physical Volume F74A0E21-6435-4CB2-801F-95682108A391

        |   ----------------------------------------------------

        |   Index:    1

        |   Disk:     disk0s2

        |   Status:   Online

        |   Size:     120988852224 B (121.0 GB)

        |

        +-< Physical Volume C2BD0D1A-7EA2-4E36-A3EF-82A7E63BE439

        |   ----------------------------------------------------

        |   Index:    2

        |   Disk:     disk1s5

        |   Status:   Online

        |   Size:     801436540928 B (801.4 GB)

        |

        +-> Logical Volume Family 9DD06D63-96CD-4088-8F0E-061026E68C29

            ----------------------------------------------------------

            Encryption Status:       Unlocked

            Encryption Type:         None

            Conversion Status:       NoConversion

            Conversion Direction:    -none-

            Has Encrypted Extents:   No

            Fully Secure:            No

            Passphrase Required:     No

            |

            +-> Logical Volume A531CC02-E337-473E-8F1F-F462595E1354

                ---------------------------------------------------

                Disk:                  disk3

                Status:                Online

                Size (Total):          1060804022272 B (1.1 TB)

                Conversion Progress:   -none-

                Revertible:            No

                LV Name:               Macintosh HD

                Volume Name:           Macintosh HD

                Content Hint:          Apple_HFS

     

  • by 213JB,

    213JB 213JB Apr 17, 2014 7:38 PM in response to Hepatitan
    Level 2 (380 points)
    Apr 17, 2014 7:38 PM in response to Hepatitan

    diskutil zerodisk "disk idtentifier "

     

    control c to stop the process after a bit

     

    diskutil list

     

    see if its gone, after getting rid of the partitions.

     

    Boot to recovery and use disk utiltiy > Select one of the disks. you'll be prompted to repair.

  • by Hepatitan,

    Hepatitan Hepatitan Apr 17, 2014 7:44 PM in response to 213JB
    Level 1 (0 points)
    Apr 17, 2014 7:44 PM in response to 213JB

    This sounds like what I originally did.  I deleted the CoreStorage logical volume, went to disk utility, and repaired.  Unfortunately when I went to the win8 installer it had about 7-8 partitions and refused to install to the bootcamp partition I created.

     

    Also, why are there all these tiny disks listed?  disk4-14 seem like they shouldn't exist.  But my biggest question is about disk0-disk3, is that the proper structure for a fusion drive?

  • by Pepetono,

    Pepetono Pepetono Jan 7, 2016 2:36 PM in response to Hepatitan
    Level 1 (0 points)
    Jan 7, 2016 2:36 PM in response to Hepatitan

    Hi, how did you solve this, I've just got in the same situation, but I didn't want to partition my disk, my mac was acting estrange, so I was trying to reinstall everything but I fusion drive got errors.

  • by GroundZeroUK,

    GroundZeroUK GroundZeroUK Mar 3, 2016 6:08 AM in response to Pepetono
    Level 1 (0 points)
    Mar 3, 2016 6:08 AM in response to Pepetono

    Same this end 3tb fusion drive i've followed tutorials and created partition for windows I want to factory reset the drive after doing a time machine backup does anyone know a straightforward way of doing this?