supersonic_jet
Level 1 (0 points)

Q: How to restore partition layout of my 1TB Fusion Drive?

Hi there,

 

I purchased a Late 2013 iMac 27" with a 1 TB Fusion Drive. I tried to install Windows 8.1 without Bootcamp. My Installation with Bootcamp didn't work - there was an error stating that Windows Installation was not able to prepare for the next step of the installation - so I partitioned manually via OS X Disk Utility (resizing the Macintosh HD) and tried to install to the unused disk space - okay my mistake. This somehow didn't work either. Now I have the following situation: The Disk Utility shows the following partition layout:

 

Macintosh HD 779,53 GB

Unused disk space 220,33 GB

 

I am not able to resize the Macintosh HD to use the unused disk space (original partition layout). There is no option for this. The partition layout option is greyed out. When I try to create a second partition of the unused space and proceed, nothing happens (protocol states preparing to partition: „APPLE HDD ST1000DM003 Media“ - nothing more). The operation will not finish. Next to the partition scheme is the following information (translated from german): "For a new partition layout the whole capacity of the Fusion Drive won't be available." The whole Macintosh HD now has a capacity of 900,52GB (Disk Utility).

 

What can I do to restore to the original partition layout of my Fusion Drive which had a capacity of about 1,1TB?

 

Thank you for your help!

 

Chris

iMac, OS X Mavericks (10.9.4)

Posted on Aug 11, 2014 1:38 PM

by supersonic_jet,Solvedanswer
supersonic_jet supersonic_jet
Level 1 (0 points)
A:

Hi,

 

I just did the following to restore the partition layout of my 1TB Fusion Drive (all data will be erased - use Time Machine to backup and restore), maybe there is an other way, but it worked for me:

 

1. create a Time Machine Backup of all your Data

2. boot into Recovery with CMD+R at Mac startup

3. identify the ID of your coreStorage (connection between HDD and SSD = Fusion Drive)

diskutil coreStorage list

|

+-- Logical Volume Group XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX

4. use the Terminal to delete the coreStorage with the command

diskutil coreStorage delete XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX

5. run the Disk Utility (GUI) from Recovery Mode - HDD and SSD partitions are red now - click on one of them - the tool asks, if you want to restore the Fusion Drive - ALL your data and partitions will be erased if you proceed

6. restore your OS X with the Time Machine Backup

 

That's it, now I'll try Bootcamp again...

 

Chris

Posted on Aug 12, 2014 2:14 PM

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supersonic_jet

Q: How to restore partition layout of my 1TB Fusion Drive?

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  • Helpful answers

  • by Loner T,

    Loner T Loner T Aug 11, 2014 1:44 PM in response to supersonic_jet
    Level 7 (23,543 points)
    Safari
    Aug 11, 2014 1:44 PM in response to supersonic_jet

    Windows 8.1 can be installed either via the traditional Bootcamp (CSM-BIOS) or using EFI on Late 2013 machines. The following is confusing on what you tried.

    I tried to install Windows 8.1 without Bootcamp. My Installation with Bootcamp didn't work

     

    What issues did you have with Bootcamp/Windows 8.1 installation?

     

    Boot Camp 5.1: Frequently asked questions

     

    Do computers that come with a Fusion Drive support Boot Camp?


    Yes. Use the Boot Camp Assistant to create a Windows partition and install Boot Camp. The Windows partition will exist on the hard disk drive, not the Flash drive, and is not part of Fusion Drive Logical Volume Group. 3TB Fusion Drive configurations need to update to OS X Mountain Lion v10.8.3 or later to install Windows 8. See iMac (27-inch, Late 2012): Boot Camp alert with 3TB hard drive for more information.



  • by supersonic_jet,

    supersonic_jet supersonic_jet Aug 11, 2014 1:55 PM in response to Loner T
    Level 1 (0 points)
    Aug 11, 2014 1:55 PM in response to Loner T

    Hi Loner T,

     

    during Windows Installation (with Bootcamp preparation) I choose the partition with the name BOOTCAMP as target for Windows. But there was an error message that this was not possible because of (unfortunately exact message i forgot) MBR and not EFI something... :-(

     

    Where could I have chosen the different methods?

     

    Chris

  • by Loner T,Helpful

    Loner T Loner T Aug 11, 2014 2:27 PM in response to supersonic_jet
    Level 7 (23,543 points)
    Safari
    Aug 11, 2014 2:27 PM in response to supersonic_jet

    If the Bootcamp Assistant did not create the partition (and it does other things in the background), it will not let you install Windows (this is the CSM-BIOS method) and user has no control. For this method to work, the only partitions on your original pre-Bootcamp single-disk (Fusion drives may have two physical drives but they are fused into a single disk) system should be EFI, Recovery HD and OSX. This method uses a Hybrid MBR and CSM-BIOS. In the Bootcamp FAQ, a CSM-BIOS installation uses only the HDD (not the SSD)

     

    The Windows partition will exist on the hard disk drive, not the Flash drive, and is not part of Fusion Drive Logical Volume Group.

     

    If you do not allow Bootcamp do the partitioning but use Disk Utility and create Free Space, and use the following steps, you can use the EFI side. If you want an EFI installation, and have built a USB with Bootcamp drivers and the Windows ISO (or DVD) then when your machine reboots and starts the Windows installation, holding the ALT key may show you additional entries, which will probably be OSX, Recovery HD, Windows, EFI Boot.


    If you select EFI boot here, than you are not using CSM-BIOS, but EFI. It has some advantages over the traditional method, but some older Macs may have issues with Sound and Graphics when using the EFI method, but yours is new enough.


    If you want to try the EFI route, please ask.

  • by supersonic_jet,

    supersonic_jet supersonic_jet Aug 11, 2014 2:59 PM in response to Loner T
    Level 1 (0 points)
    Aug 11, 2014 2:59 PM in response to Loner T

    Thank you very much for the information you provided!

     

    I tried now to install to the unused Disk Space with the current partition layout. When restarting with ALT I chose EFI Boot, followed the Windows Installation steps and chose unused disk space of 220GB as target. An new error occurred: it states the partition is no NTFS format, I should reformat to FAT 32 an try again (this confused me: why is it complaining it's not NTFS and in the next steps asks to reformat to FAT32). As I went back to Mavericks Disk Utility I found the following partition layout:

     

    Macintosh HD with 779,53 GB

    an the the 220GB of unused space was partitioned as follows:

    disk1s4 with 134,2 MB

    disk1s6 with 314,6 MB

    Untitled (NTFS) 218,98 GB

     

    I wonder how to start from scratch again?

     

    Chris

  • by Loner T,

    Loner T Loner T Aug 11, 2014 4:19 PM in response to supersonic_jet
    Level 7 (23,543 points)
    Safari
    Aug 11, 2014 4:19 PM in response to supersonic_jet

    When I installed Windows8.1, it wanted it to be Free space with not formatting and the installer formatted it into two. One Microsoft Reserved Partition, the other was formatted as NTFS. If you execute diskutil list disk1, it should show you what it has.

     

    Can you post the output of diskutil list disk1 before anything is deleted?

  • by supersonic_jet,

    supersonic_jet supersonic_jet Aug 12, 2014 12:38 AM in response to Loner T
    Level 1 (0 points)
    Aug 12, 2014 12:38 AM in response to Loner T

    Hi Loner,

     

    this is the output right now:

    diskutil list disk1

    /dev/disk1

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *1.0 TB     disk1

       1:                        EFI EFI                     209.7 MB   disk1s1

       2:          Apple_CoreStorage                         779.5 GB   disk1s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3

       4:         Microsoft Reserved                         134.2 MB   disk1s4

       5:                        EFI NO NAME                 104.9 MB   disk1s5

       6: DE94BBA4-06D1-4D40-A16A-BFD50179D6AC               314.6 MB   disk1s6

       7:                        EFI NO NAME                 104.9 MB   disk1s7

       8:       Microsoft Basic Data                         219.0 GB   disk1s8

    Chris

  • by Loner T,

    Loner T Loner T Aug 12, 2014 2:11 AM in response to supersonic_jet
    Level 7 (23,543 points)
    Safari
    Aug 12, 2014 2:11 AM in response to supersonic_jet

    On disk1, you have in order, Apple EFI, Apple CoreStorage (Fusion drive part), Recovery HD, MSR, Microsoft EFI, Microsoft Recovery, Microsoft EFI (part 2 - this makes no sense to be here - did you have an installation failure using EFI mode once), Microsoft FAT/NTFS (C:).

     

    The SSD part needs to be looked at as well.

     

    Please post the output of

     

    1. diskutil list

    2. diskutil list disk0

    3. sudo gpt -vv -r show /dev/disk0

    4. sudo gpt -vv -r show /dev/disk1

     

    If you want to see a bit more detail this can help you enable DU in debug mode - http://macs.about.com/od/usingyourmac/qt/Enable-Disk-Utilitys-Debug-Menu.htm

  • by supersonic_jet,

    supersonic_jet supersonic_jet Aug 12, 2014 2:23 AM in response to Loner T
    Level 1 (0 points)
    Aug 12, 2014 2:23 AM in response to Loner T

    Yes, I think my first attempt was also in EFI mode, this could have resulted in the second EFI part.

     

    Here are the requested outputs:

    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                        *1.0 TB     disk1

       1:                        EFI EFI                     209.7 MB   disk1s1

       2:          Apple_CoreStorage                         779.5 GB   disk1s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3

       4:         Microsoft Reserved                         134.2 MB   disk1s4

       5:                        EFI NO NAME                 104.9 MB   disk1s5

       6: DE94BBA4-06D1-4D40-A16A-BFD50179D6AC               314.6 MB   disk1s6

       7:                        EFI NO NAME                 104.9 MB   disk1s7

       8:       Microsoft Basic Data                         219.0 GB   disk1s8

    /dev/disk2

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           *894.3 GB   disk2

     

    diskutil list disk0

    /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

     

    sudo gpt -vv -r show /dev/disk0

    Password:

    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  236306352      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      236715992     262144      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      236978136          7        

      236978143         32         Sec GPT table

      236978175          1         Sec GPT header

     

    sudo gpt -vv -r show /dev/disk1

    gpt show: /dev/disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168

    gpt show: /dev/disk1: PMBR at sector 0

    gpt show: /dev/disk1: Pri GPT at sector 1

    gpt show: /dev/disk1: Sec GPT at sector 1953525167

           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  1522514312      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      1522923952     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      1524193488        1840        

      1524195328      262144      4  GPT part - E3C9E316-0B5C-4DB8-817D-F92DF00215AE

      1524457472      352256        

      1524809728      204800      5  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

      1525014528      614400      6  GPT part - DE94BBA4-06D1-4D40-A16A-BFD50179D6AC

      1525628928      204800      7  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

      1525833728   427689984      8  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1953523712        1423        

      1953525135          32         Sec GPT table

      1953525167           1         Sec GPT header

     

    Thanks for your help!

  • by Loner T,

    Loner T Loner T Aug 12, 2014 5:24 AM in response to supersonic_jet
    Level 7 (23,543 points)
    Safari
    Aug 12, 2014 5:24 AM in response to supersonic_jet

    On /dev/disk1, can you remove GPT #4,5,6,7,8 and create a single FAT partition which it can divide as it pleases?

     

    The installer is refusing to use partitions which have partial installs (the No Name EFI) stuff.

     

    I would highly recommend downloading GPT fdisk from SourceForge.

  • by supersonic_jet,Solvedanswer

    supersonic_jet supersonic_jet Aug 12, 2014 2:14 PM in response to Loner T
    Level 1 (0 points)
    Aug 12, 2014 2:14 PM in response to Loner T

    Hi,

     

    I just did the following to restore the partition layout of my 1TB Fusion Drive (all data will be erased - use Time Machine to backup and restore), maybe there is an other way, but it worked for me:

     

    1. create a Time Machine Backup of all your Data

    2. boot into Recovery with CMD+R at Mac startup

    3. identify the ID of your coreStorage (connection between HDD and SSD = Fusion Drive)

    diskutil coreStorage list

    |

    +-- Logical Volume Group XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX

    4. use the Terminal to delete the coreStorage with the command

    diskutil coreStorage delete XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX

    5. run the Disk Utility (GUI) from Recovery Mode - HDD and SSD partitions are red now - click on one of them - the tool asks, if you want to restore the Fusion Drive - ALL your data and partitions will be erased if you proceed

    6. restore your OS X with the Time Machine Backup

     

    That's it, now I'll try Bootcamp again...

     

    Chris

  • by CertifiedApplePros,

    CertifiedApplePros CertifiedApplePros Dec 15, 2015 1:59 PM in response to supersonic_jet
    Level 1 (0 points)
    Dec 15, 2015 1:59 PM in response to supersonic_jet

    Dood, you are AWESOME.  Thank you for the save.  You were the first tutorial that had us deleting the coreStorage which had held things up prior and produced all kinds of "failed to unmount" messages.  Thank you.