m_CD
Level 1 (0 points)

Q: issue: bootcamp - windows 8 - fusion drive


Hi

 

I have an iMac 3.4GHz quad-core Intel Core i5 with 1TB Fusion drive since early January this year. I have added 2 extra 4Gb of memory bringing it to 4x4.

I installed Windows 8 without any issue back then but it crashed recently and it was impossible to start it up so I decided to remove the partition and re-install it.

 

However, after 15 days and 15 hours spent on the phone with senior advisers, I am still stuck. Any help would be much appreciated.

 

Here are the steps I followed:

  1. create an iso image in Documents using Windows 8 dvd.
  2. create a partition using bootcamp (350Gb) plugging in a 1TB external hard drive
  3. Once in Windows set-up, I choose 'Drive 1 Partition 4 BOOTCAMP'. As expected, it can't go further as 'Windows must be installed to a partition formatted as NTFS'
  4. Instead of clicking 'Format' (which won't work), I press shift+F10 and end up in a terminal.
  5. Type DISKPART>list disk>select disk 1>list partition>select partition 4> format fs=NTFS label 'Windows8'  (I tried using the option 'quick' as well)
  6. Back to windows setup, I hit 'refresh'. The first time I tried it was saying 'We couldn't create a new partition or locate an existing one. For more information, see the Setup log files'. The second and subsequent times I tried I got 'Windows cannot be installed to this disk. The selected disk is of GPT partition style'
  7. Back to OS X and Disk Utility, I can see 2 parttions in Internal Drive>Partition: MacintoshHD and Windows8 which is a 350Gb partition of format 'Windows NT File System (NTFS)'

 

Questions:

  1. Any idea what is going on? The partition seems to be in the correct format (NTFS)!
  2. If GPT style partition is not the right partition style, what style should it be and how do I convert it into it?
  3. Is it an issue related to Fusion? There are many discussions out there around this issue but haven't found anything that worked for me. It seems Windows expect an MBR style partition but Fusion provides an hybrid MBR/EFI partition, No idea what it means so I am just repeting what I read.
  4. It also seems that having my external usb drive plugged in doesn't help. However, how can I unplug it while I am using it to install windows?

 

Thanks a lot for your help.

iMac, null

Posted on Feb 27, 2015 2:11 AM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (24,738 points)
Safari
A:

Excellent.

 

The USB3 external HD causes BCA problems. This is where it failed with proper partitioning (missing MBR). The GPT Fdisk recreated the Hybrid MBR, as the Windows GPT entry already existed (BCA should not have done this step either, but it uses asynchronous dm callbacks, leaving the setup in a mixed state).

 

 

The SMC and PRAM reset is done to tell the Mac to remove any entries that are incomplete. Here is an entry for the completed BC installation

nvram -p | grep -i bootcamp

BootCampHD %02%01%0c%00%d0A%03%0a%00%00%00%00%01%01%06%00%02%1f%03%12%0a%00%00%00%00%00%00 %00%7f%ff%04%00

The Apple Bootmanager interprets this string-value and has data that it can use.

 

The NTFS-to-FAT change was done to tell BCA that the partition was ready for use. 0x07 (aka NTFS) is the final state. The NVRAM and this MBR entry are used by BCA.

Posted on Mar 3, 2015 3:15 PM

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m_CD

Q: issue: bootcamp - windows 8 - fusion drive

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  • Helpful answers

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  • by LukeJQuinn,

    LukeJQuinn LukeJQuinn Feb 27, 2015 4:29 AM in response to m_CD
    Level 1 (24 points)
    Notebooks
    Feb 27, 2015 4:29 AM in response to m_CD

    I would start by trying to get hold of proper ISO image rather than making your own.

     

    I have Boot Camped many Fusion Drive iMacs but only ever used an official Microsoft ISO and never had any issues.

  • by m_CD,

    m_CD m_CD Feb 27, 2015 5:52 AM in response to LukeJQuinn
    Level 1 (0 points)
    Feb 27, 2015 5:52 AM in response to LukeJQuinn

    thanks for your answer. What do you mean by a 'proper ISO image'? I bought Windows 8.1 dvd and created an image as per bootcamp tutorial. I am open to any other alternative.

  • by Loner T,Helpful

    Loner T Loner T Feb 27, 2015 7:57 AM in response to m_CD
    Level 7 (24,738 points)
    Safari
    Feb 27, 2015 7:57 AM in response to m_CD

    m_CD wrote:

     

    create a partition using bootcamp (350Gb) plugging in a 1TB external hard drive

    Do not use any external storage when installing Windows via BCA. Use a 8+ GB USB2 Flash drive instead. Do not use a USB3.

     

    Instead of clicking 'Format' (which won't work), I press shift+F10 and end up in a terminal.

    This is supposed to work. Please see Macs with Fusion drive: How to find BOOTCAMP partition in Windows installer - Apple Support and https://help.apple.com/bootcamp/mac/5.0/help/#/bcmp173b3bf2.

     

    Back to windows setup, I hit 'refresh'. The first time I tried it was saying 'We couldn't create a new partition or locate an existing one. For more information, see the Setup log files'. The second and subsequent times I tried I got 'Windows cannot be installed to this disk. The selected disk is of GPT partition style'

    You are switching between legacy MBR method (used by BCA) and EFI Boot from your Windows DVD. Your Mac must be UEFI-compliant to work with EFI installer. Late 2013+ Macs and later Macs are UEFI-compliant. EFI installation uses MSR/MSD partitioning, and the MSR must exist in the first 2TB disk space for this to work.

     

     

    Questions:

    1. Any idea what is going on? The partition seems to be in the correct format (NTFS)!
    2. If GPT style partition is not the right partition style, what style should it be and how do I convert it into it?
    3. Is it an issue related to Fusion? There are many discussions out there around this issue but haven't found anything that worked for me. It seems Windows expect an MBR style partition but Fusion provides an hybrid MBR/EFI partition, No idea what it means so I am just repeting what I read.
    4. It also seems that having my external usb drive plugged in doesn't help. However, how can I unplug it while I am using it to install windows?

    There are two styles that Macs can support. Any Mac which is pre-UEFI supports legacy MBR only. Macs implement a Hybrid MBR which is setup as a 1:1 mapping between GPT and MBR. No partition resizing/movement is allowed in this method.

     

    This issue gets further complicated when using 3TB Fusion drives (but not smaller Fusion drives of 1TB). As mentioned, do not connect any external storage, BCA will refuse to work, because it thinks you are trying to install Windows on an external disk. Use only a USB2 Flash of 8+GB as suggested.

  • by m_CD,

    m_CD m_CD Feb 27, 2015 8:01 AM in response to Loner T
    Level 1 (0 points)
    Feb 27, 2015 8:01 AM in response to Loner T

    Thanks for all these details. I will try asap!

    Note: I did manage to install it the first time using the external hard drive. But let's forget the past.

  • by m_CD,

    m_CD m_CD Mar 2, 2015 12:40 PM in response to m_CD
    Level 1 (0 points)
    Mar 2, 2015 12:40 PM in response to m_CD

    hi

     

    I bought a USB2 flash drive today and still can't get it working. After formatting the drive 1 Partition 4 Bootcamp from the Windows setup, I get: 'We couldn't create a new partition or locate an existing one'.

     

    Any idea how I can fix that?

     

    There are countless discussions around this issue and it is hard to believe Apple Support has no answer to that (except saying it is a windows issue while it is clearly not as simple as that). It seems the only solution is to create a partition form Disk Utility while Bootcamp is supposedly the proper tool for doing that. I am therefore a bit reluctant in trying that.


    Thanks for your help!

  • by Loner T,Helpful

    Loner T Loner T Mar 2, 2015 1:16 PM in response to m_CD
    Level 7 (24,738 points)
    Safari
    Mar 2, 2015 1:16 PM in response to m_CD

    m_CD wrote:

     

     

    I bought a USB2 flash drive today and still can't get it working. After formatting the drive 1 Partition 4 Bootcamp from the Windows setup, I get: 'We couldn't create a new partition or locate an existing one'.

    This happens when EFI boot is chosen, and BCA has failed to create the Hybrid MBR.

     

    Can you post the output of following OSX Terminal commands? Enter your password when prompted and it will not be echoed back to you. "sudo" may also warn you about improper usage and data loss.

     

    sudo fdisk /dev/disk0

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk1

    sudo gpt -vv -r show /dev/disk1

  • by m_CD,

    m_CD m_CD Mar 2, 2015 1:36 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 1:36 PM in response to Loner T

    HI Loner T

    thanks for your answer.

    I already ran them and posted them to one of your previous post: Error: "We couldn't create a new partition or locate and existing one" installing Windows 8.1 via Bootcamp

    Putting them back here for consistency.

    Thanks a lot for your help!

    Last login: Mon Mar  2 19:59:03 on console

    charles-pc:~ Charles$ 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                         638.9 GB   disk1s2

       3:                 Apple_Boot Recovery HD             650.1 MB   disk1s3

       4:       Microsoft Basic Data                         360.5 GB   disk1s4

    /dev/disk2

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           *754.0 GB   disk2

                                     Logical Volume on disk0s2, disk1s2

                                     5AF6F133-EDD1-4A59-98D9-6398F79F408D

                                     Unencrypted Fusion Drive

    /dev/disk3

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     FDisk_partition_scheme                        *15.6 GB    disk3

       1:                 DOS_FAT_32 WININSTALL              15.6 GB    disk3s1

    charles-pc:~ Charles$ sudo gpt -vv -r show /dev/disk1

    Password:

    Sorry, try again.

    Password:

    Sorry, try again.

    Password:

    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  1247785824      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      1248195464     1269760      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      1249465224        1144       

      1249466368   704057344      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1953523712        1423       

      1953525135          32         Sec GPT table

      1953525167           1         Sec GPT header

    charles-pc:~ Charles$ sudo fdisk /dev/disk1

    Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 sectors]

    Signature: 0xAA55

             Starting       Ending

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

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

    1: EE 1023 254  63 - 1023 254  63 [         1 - 1953525167] <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    

    charles-pc:~ Charles$ sudo dd if-/dev/rdisk1s4 count=1 2>/dev/null | hexdump -C

    charles-pc:~ Charles$ sudo dd if=/dev/rdisk1s4 count=1 2>/dev/null | hexdump -C

    00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|

    00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 58 79 4a  |........?....XyJ|

    00000020  00 00 00 00 80 00 80 00  ff 0f f7 29 00 00 00 00  |...........)....|

    00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|

    00000040  f6 00 00 00 01 00 00 00  a5 0a 34 34 11 34 34 82  |..........44.44.|

    00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|

    00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|

    00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|

    00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|

    00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|

    000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|

    000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|

    000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|

    000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|

    000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|

    000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|

    00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|

    00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|

    00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|

    00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|

    00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|

    00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|

    00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|

    00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|

    00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|

    00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|

    000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|

    000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|

    000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|

    000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|

    000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

    000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|

    00000200

    charles-pc:~ Charles$

  • by m_CD,

    m_CD m_CD Mar 2, 2015 1:45 PM in response to m_CD
    Level 1 (0 points)
    Mar 2, 2015 1:45 PM in response to m_CD

    I tried to install windows first on the windows boot (pressing the option button I can choose between Mackintosh HD, windows and EFI). I got the above error message. I also tried on EFI and got the same issue.

  • by Loner T,

    Loner T Loner T Mar 2, 2015 1:46 PM in response to m_CD
    Level 7 (24,738 points)
    Safari
    Mar 2, 2015 1:46 PM in response to m_CD

    Your MBR (output of fdisk) is missing, because BCA failed to create one. Please download GPT Fdisk (http://sourceforge.net/projects/gptfdisk/) and this can be corrected. EFI boot is unlikely to work.

  • by m_CD,

    m_CD m_CD Mar 2, 2015 1:53 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 1:53 PM in response to Loner T

    great! I've downloaded it. Do you know what I should do next or do you have a link I should follow? I can always google it but I will be more comfortable with a guideline (and people reading this chat will have a self-contained solution).

    Thanks a lot!

  • by Loner T,

    Loner T Loner T Mar 2, 2015 3:56 PM in response to m_CD
    Level 7 (24,738 points)
    Safari
    Mar 2, 2015 3:56 PM in response to m_CD

    Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR.

    Use defaults as suggested by Gdisk for other questions (for example Enter an MBR hex code (default AF): AF).

     

    Sudo gdisk /dev/disk0

    P  (Print list of parts)

    R   (Recover)

    H (chooses Hybrid)

    Partitions numbers to be hybridized: 2 3 4

    Y (Good for GRUB question)

    N (part 2 boot flag)

    N (part 3 boot flag)

    Y  (part 4 boot flag make NTFS bootable partition)

    W  (Write the new MBR)

    Y    (Yes! write the new MBR)

    Reboot

  • by m_CD,

    m_CD m_CD Mar 2, 2015 11:31 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 11:31 PM in response to Loner T

    I have just tried and got the same error message. I was able to click once on 'Next' in the Windows setup. I also clicked on format the second time.

     

    Here are the command lines I used:

     

    FullSizeRender.jpg

     

    After getting the above image, I restarted the computer, selected the windows boot as before.

     

    Back to OS X, I get the below (which seems to indicate there is an MBR partition, right?).

     

    Thanks!

     

    Last login: Tue Mar  3 07:16:44 on ttys000

    charles-pc:~ Charles$ 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                         638.9 GB   disk1s2

       3:                 Apple_Boot Recovery HD             650.1 MB   disk1s3

       4:       Microsoft Basic Data                         360.5 GB   disk1s4

    /dev/disk2

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           *754.0 GB   disk2

                                     Logical Volume on disk0s2, disk1s2

                                     5AF6F133-EDD1-4A59-98D9-6398F79F408D

                                     Unencrypted Fusion Drive

    /dev/disk3

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     FDisk_partition_scheme                        *15.6 GB    disk3

       1:                 DOS_FAT_32 WININSTALL              15.6 GB    disk3s1

    charles-pc:~ Charles$ sudo gpt -vv -r show /dev/disk1

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

    gpt show: /dev/disk1: Suspicious MBR 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         MBR

               1           1         Pri GPT header

               2          32         Pri GPT table

              34           6       

              40      409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

          409640  1247785824      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      1248195464     1269760      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      1249465224        1144       

      1249466368   704057344      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1953523712        1423       

      1953525135          32         Sec GPT table

      1953525167           1         Sec GPT header

    charles-pc:~ Charles$ sudo fdisk /dev/disk1

    Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 sectors]

    Signature: 0xAA55

             Starting       Ending

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

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

    1: EE    0   0   2 -   25 127  14 [         1 -     409639] <Unknown ID>

    2: AF   25 127  15 - 1023 254  63 [    409640 - 1247785824] HFS+      

    3: AB 1023 254  63 - 1023 254  63 [1248195464 -    1269760] Darwin Boot

    *4: 07 1023 254  63 - 1023 254  63 [1249466368 -  704057344] HPFS/QNX/AUX

    charles-pc:~ Charles$ sudo dd if=/dev/rdisk1s4 count=1 2>/dev/null | hexdump -C

    00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|

    00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 58 79 4a  |........?....XyJ|

    00000020  00 00 00 00 80 00 80 00  ff 0f f7 29 00 00 00 00  |...........)....|

    00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|

    00000040  f6 00 00 00 01 00 00 00  58 b9 ce 4e f3 ce 4e 68  |........X..N..Nh|

    00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|

    00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|

    00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|

    00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|

    00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|

    000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|

    000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|

    000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|

    000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|

    000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|

    000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|

    00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|

    00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|

    00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|

    00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|

    00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|

    00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|

    00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|

    00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|

    00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|

    00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|

    000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|

    000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|

    000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|

    000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|

    000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

    000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|

    00000200

    charles-pc:~ Charles$

  • by Loner T,

    Loner T Loner T Mar 3, 2015 1:57 AM in response to m_CD
    Level 7 (24,738 points)
    Safari
    Mar 3, 2015 1:57 AM in response to m_CD

    For entry #2 (the OS X partition), if you notice, the first 'p' command shows the code of 0x'AF05', while the MBR update changes it to 0x'AF00'. This is not correct. I suggest you correct it. Add a second 'p' command before the 'w' and 'y' commands.

     

    Can you post a screen shot of the error message?

  • by m_CD,

    m_CD m_CD Mar 3, 2015 3:08 AM in response to Loner T
    Level 1 (0 points)
    Mar 3, 2015 3:08 AM in response to Loner T

    How do I change that? By re-running the commands in the above picture, doing the following?

     

    1. sudo gdisk /dev/disk1
    2. P
    3. R
    4. H
    5. 2 3 4
    6. Y
    7. af
    8. N
    9. ab
    10. N
    11. 0c (note: I typed 0c instaed of 07 as I saw on some tutrial, not sure it is correct)
    12. Y
    13. p
    14. W
    15. Y

    Reboot

     

    I'll post a screenshot (if it appears again ) when I get home.

     

    Thanks

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