Jake Wherry
Level 1 (13 points)
Desktops

Q: Removed Bootcamp with Disk Util, recovered, BUT

Hi

I spent the day trying to install Windows 8.1 from a USB stick, on my iMac 5k with a 3TB Fusion Drive

Like many others here, I kept getting stuck with GPT errors. Eventually I stupidly removed the Bootcamp partition, and ran into the subsequent problems of lost/redundant HD space and greyed out options for removing/changing partition sizes in Disk Utility.

After ploughing through pages of forums, I managed to delete the redundant space while booted up from Internet recovery, using the terminal- my Fusion drive went back to its full 3TB capacity. Using advice from here:

http://apple.stackexchange.com/questions/168723/i-think-i-messed-up-the-fusion-d rive-on-my-1tb-imac-with-bootcamp

 

However, I have been following LONER's great advice on these threads :

Windows 8.1 install on iMac with fusion drive, GPT partition error

Can't format former Boot Camp partition

 

But when i get to enter "2 3 4" I get this message :

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence: 2 3 4

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): y

 

GPT partition #2 does not exist or is too big; skipping.

 

GPT partition #3 does not exist or is too big; skipping.

 

GPT partition #4 does not exist or is too big; skipping.

 

No partitions converted; original protective/hybrid MBR is unmodified!

 

Maybe when I removed the redundant space on my HD I didn't fix the drive back to how it should have been?

I have a full backup on an external drive so if I have to wipe my Fusion drive and start again it's no big deal.

 

Here is the output from

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk1

sudo fdisk /dev/disk1

 

Wherry-iMac:~ Wherrys$ 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                         2.3 TB     disk1s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3

   4:       Microsoft Basic Data BOOTCAMP                700.9 GB   disk1s4

/dev/disk2

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Macintosh HD           *2.4 TB     disk2

                                 Logical Volume on disk0s2, disk1s2

                                 51210933-CA61-4132-99DA-14284FB36473

                                 Unencrypted Fusion Drive

Wherry-iMac:~ Wherrys$ diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 04F51976-32DF-4C3F-9296-6ADADC7EEBAA

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

    Name:         Macintosh HD

    Status:       Online

    Size:         2419855843328 B (2.4 TB)

    Free Space:   376832 B (376.8 KB)

    |

    +-< Physical Volume D5D20091-CCC3-48F2-85F9-0207EFE7304A

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

    |   Index:    0

    |   Disk:     disk0s2

    |   Status:   Online

    |   Size:     120988852224 B (121.0 GB)

    |

    +-< Physical Volume A6AD4A38-FCA2-4543-9CD8-5525D9C2639F

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

    |   Index:    1

    |   Disk:     disk1s2

    |   Status:   Online

    |   Size:     2298866991104 B (2.3 TB)

    |

    +-> Logical Volume Family 2B272C20-609F-42F6-AB2E-219AEE481B7E

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

        Encryption Status:       Unlocked

        Encryption Type:         None

        Conversion Status:       NoConversion

        Conversion Direction:    -none-

        Has Encrypted Extents:   No

        Fully Secure:            No

        Passphrase Required:     No

        |

        +-> Logical Volume 51210933-CA61-4132-99DA-14284FB36473

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

            Disk:                  disk2

            Status:                Online

            Size (Total):          2414000209920 B (2.4 TB)

            Conversion Progress:   -none-

            Revertible:            No

            LV Name:               Macintosh HD

            Volume Name:           Macintosh HD

            Content Hint:          Apple_HFS

Wherry-iMac:~ Wherrys$ sudo gpt -vv -r show /dev/disk1

Password:

gpt show: /dev/disk1: mediasize=3000592982016; sectorsize=512; blocks=5860533168

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 5860533167

       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  4489974592      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

  4490384232     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

  4491653768        1400        

  4491655168  1368877056      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  5860532224         911        

  5860533135          32         Sec GPT table

  5860533167           1         Sec GPT header

Wherry-iMac:~ Wherrys$ sudo fdisk /dev/disk1

Disk: /dev/disk1 geometry: 97451/255/63 [1565565872 sectors]

Signature: 0xAA55

         Starting       Ending

#: id  cyl  hd sec -  cyl  hd sec [     start -       size]

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

1: EE 1023 254  63 - 1023 254  63 [         1 - 4294967294] <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

 

Thanks in advance for any help

Posted on Jul 31, 2015 5:01 PM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (23,633 points)
Safari
A:

This is what I had expected as well, based on the location of the partition outside the 2TB boundary. I am glad you have it under control. Please ensure you have good back ups of both OSes, because you want to avoid these shenanigans in the future.

Posted on Aug 1, 2015 6:37 AM

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Jake Wherry

Q: Removed Bootcamp with Disk Util, recovered, BUT

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Page 1 Next

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 5:13 PM in response to Jake Wherry
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 5:13 PM in response to Jake Wherry

    I forgot to mention that I also had the following problem at first - after running BA when the computer restarted I got a Circle with a slash (prohibited) icon, and I had to power down the iMac. On subsequent attempts to install Windows after running BA I pressed alt at startup and selected the Windows usb disk, where I then ran into the GPT problems

  • by Loner T,

    Loner T Loner T Jul 31, 2015 5:29 PM in response to Jake Wherry
    Level 7 (23,633 points)
    Safari
    Jul 31, 2015 5:29 PM in response to Jake Wherry

    You have several different contradictory states in this configuration.

     

    1. You have Bootcamp at the very end of a 3TB HDD, specifically beyond the 2TB boundary, so a MBR will not work.

    2. If BC Assistant wanted you to use EFI boot (because your iMac is UEFI-compliant), the partition should be left as Free Space, but it is now a FAT partition.

     

    Either we can erase it and make it Free Space and you can try an EFI installation, or, use BCA (only) to remove the current BCA, run Disk Utility and run Disk Repair, and try BCA again.

     

    Which option do you want to pursue?

     

    My 2c - the EFI method has fewer restrictions and is more flexible and faster.

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 5:32 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 5:32 PM in response to Loner T

    I'm happy to try the EFI method, though (and I don't know much about this sort of thing) I haven't seen an EFI option next to Windows when I've booted up and pressed "alt" with my windows usb stick - should I have seen an option to boot from EFI?

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:03 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:03 PM in response to Loner T

    Hi Loner - thanks for helping me out.

    It's 2am here and I'm struggling, I'll try and stay up for bit longer, but if I don't reply straight away, I'll catch up tomorrow and follow any instructions that you leave.

    Any idea why I was getting the circle/slash icon when BCA had finished and the computer restarted?

    Thanks

  • by Loner T,

    Loner T Loner T Jul 31, 2015 6:22 PM in response to Jake Wherry
    Level 7 (23,633 points)
    Safari
    Jul 31, 2015 6:22 PM in response to Jake Wherry

    BCA failed to set the NVRAM correctly with the boot_arg value, and it was pointing to a non-bootable location, hence the circle/slash icon.

     

    To convert the existing bootcamp FAT/NTFS partition to Free Space, please use the following command from Terminal.

     

    diskutil eraseVolume free Untitled disk1s4

     

    We can proceed further tomorrow after you get some sleep.

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:23 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:23 PM in response to Loner T

    Thanks - I'm good for another 1/2 hour I reckon if you don;t mind carrying on?

     

    diskutil eraseVolume free Untitled disk1s4

    Started erase on disk1s4 BOOTCAMP

    Unmounting disk

    Error: 2: POSIX reports: No such file or directory

  • by Loner T,

    Loner T Loner T Jul 31, 2015 6:27 PM in response to Jake Wherry
    Level 7 (23,633 points)
    Safari
    Jul 31, 2015 6:27 PM in response to Jake Wherry

    This is expected. Since the disk slice has been converted to free space, no disk1s4 exists and will appear, The POSIX error is because there is no longer a device node called /dev/disk1s4 or /dev/rdisk1s4.

     

    Let us verify it. Please post the output of diskutil list disk1 .

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:28 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:28 PM in response to Loner T

    diskutil list disk1

    /dev/disk1

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *3.0 TB     disk1

       1:                        EFI EFI                     209.7 MB   disk1s1

       2:          Apple_CoreStorage                         2.3 TB     disk1s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3

  • by Loner T,

    Loner T Loner T Jul 31, 2015 6:34 PM in response to Jake Wherry
    Level 7 (23,633 points)
    Safari
    Jul 31, 2015 6:34 PM in response to Jake Wherry

    One more command to be certain beyond a shadow of a doubt.

     

    sudo gpt -vv -r show /dev/disk1

     

    I expect a chunk of space after Recovery HD.

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:35 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:35 PM in response to Loner T

    sudo gpt -vv -r show /dev/disk1

    Password:

    gpt show: /dev/disk1: mediasize=3000592982016; sectorsize=512; blocks=5860533168

    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 5860533167

           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  4489974592      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      4490384232     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      4491653768  1368879367        

      5860533135          32         Sec GPT table

      5860533167           1         Sec GPT header

  • by Loner T,

    Loner T Loner T Jul 31, 2015 6:38 PM in response to Jake Wherry
    Level 7 (23,633 points)
    Safari
    Jul 31, 2015 6:38 PM in response to Jake Wherry

    Jake Wherry wrote:

     

    sudo gpt -vv -r show /dev/disk1

    Password:

    gpt show: /dev/disk1: mediasize=3000592982016; sectorsize=512; blocks=5860533168

    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 5860533167

           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  4489974592      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      4490384232     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

    4491653768  1368879367       

      5860533135          32         Sec GPT table

      5860533167           1         Sec GPT header

    The highlighted line is now free space. If you have created a USB, boot from it, and select EFI Boot. I expect an error during your installation. It is most likely going to fail because it will not find an MSR after it creates it.

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:40 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:40 PM in response to Loner T

    will do now

    brb

    thanks again

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:46 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:46 PM in response to Loner T

    When I restarted and held down ALT I only saw "Macintosh HD" and "Windows" - EFI option

    It could be something to do with how I made the USB disk - using BCA i kept getting errors saying "could not be completed error copying windows files" So I used Rufus on a PC.

  • by Jake Wherry,

    Jake Wherry Jake Wherry Jul 31, 2015 6:53 PM in response to Loner T
    Level 1 (13 points)
    Desktops
    Jul 31, 2015 6:53 PM in response to Loner T

    I'm making another bootable USB stick - could you tell me whether I should be selecting MBR or GPT partition scheme please?

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