tomfromvleuten
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Q: windows boot option is suddenly missing

Hi, two or three ago suddenly the boot option for Windows has disappeared. It is an Imac 27 inch, late 2013 model on OS X Yosemite 10.10.3 (14D136)

No i can only start OSX and it seems that windows was never there? How can i restore this? I normaly press ALT and then two boot options show up, recently only OSX. I did not changed anything. What i did see in the deleted items is a couple of files since the last days, maybe this is related?

Schermafbeelding 2015-07-01 om 00.01.02.png

 

Modelnaam: iMac

  Modelaanduiding: iMac14,2

  Processornaam: Intel Core i7

  Processorsnelheid: 3,5 GHz

  Aantal processors: 1

  Totale aantal cores: 4

  L2-cache (per core): 256 KB

  L3-cache: 8 MB

  Geheugen: 16 GB

  Opstart-ROM-versie: IM142.0118.B09

  SMC-versie (systeem): 2.15f7

iMac, OS X Yosemite (10.10.3)

Posted on Jun 30, 2015 3:06 PM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (24,855 points)
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A:

Was the Yosemite Recovery Update applied to your iMac?

Posted on Jun 30, 2015 4:13 PM

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tomfromvleuten

Q: windows boot option is suddenly missing

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  • by Loner T,

    Loner T Loner T Jul 7, 2015 1:35 PM in response to tomfromvleuten
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    Jul 7, 2015 1:35 PM in response to tomfromvleuten

    This does not match a NTFS header.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 1:37 PM in response to Loner T
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    Jul 7, 2015 1:37 PM in response to Loner T

    what doen this mean?

  • by Loner T,

    Loner T Loner T Jul 7, 2015 1:47 PM in response to tomfromvleuten
    Level 7 (24,855 points)
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    Jul 7, 2015 1:47 PM in response to tomfromvleuten

    This is an example of a valid NTFS header from my MBP which has Bootcamp on it.

     

    sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

    Password:

    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 e8 71 56  |........?.....qV|

    00000020  00 00 00 00 80 00 80 00  f8 f7 08 1e 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  13 32 6d 13 b7 bb b5 32  |.........2m....2|

    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 70 0e 16  68 09 00 66 53 66 53 66  |h...hp..h..fSfSf|

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

    00000110  28 10 b9 d8 0f fc f3 aa  e9 5f 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 a0 f8 01 e8 09 00  |...u...fa.......|

    00000170  a0 fb 01 e8 03 00 f4 eb  fd b4 01 8b f0 ac 3c 00  |..............<.|

    00000180  74 09 b4 0e bb 07 00 cd  10 eb f2 c3 0d 0a 41 20  |t.............A |

    00000190  64 69 73 6b 20 72 65 61  64 20 65 72 72 6f 72 20  |disk read error |

    000001a0  6f 63 63 75 72 72 65 64  00 0d 0a 42 4f 4f 54 4d  |occurred...BOOTM|

    000001b0  47 52 20 69 73 20 6d 69  73 73 69 6e 67 00 0d 0a  |GR is missing...|

    000001c0  42 4f 4f 54 4d 47 52 20  69 73 20 63 6f 6d 70 72  |BOOTMGR is compr|

    000001d0  65 73 73 65 64 00 0d 0a  50 72 65 73 73 20 43 74  |essed...Press Ct|

    000001e0  72 6c 2b 41 6c 74 2b 44  65 6c 20 74 6f 20 72 65  |rl+Alt+Del to re|

    000001f0  73 74 61 72 74 0d 0a 00  8c a9 be d6 00 00 55 aa  |start.........U.|

    00000200

     

    The Start address that we picked is the the first [NO NAME] entry at 1671047307 as shown on the third page of this discussion.

     

    Can you download a trial version of http://www.stellarinfo.com/mac-osx-recovery.php and see if it can rebuild the MFT and show you your files?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 1:54 PM in response to Loner T
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    Jul 7, 2015 1:54 PM in response to Loner T

    Which scan? No name 134,69 / recover data?

    Schermafbeelding 2015-07-07 om 13.52.57.pngoption

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 2:04 PM in response to tomfromvleuten
    Level 1 (0 points)
    Jul 7, 2015 2:04 PM in response to tomfromvleuten

    i am performing an advanced scan of No name, it should be ready in 15 min

  • by Loner T,

    Loner T Loner T Jul 7, 2015 2:08 PM in response to tomfromvleuten
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    Jul 7, 2015 2:08 PM in response to tomfromvleuten

    I am puzzled and surprised that it shows up as FAT, not NTFS. The 791+134 is ~925 GB on a 999 GB disk.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 2:20 PM in response to Loner T
    Level 1 (0 points)
    Jul 7, 2015 2:20 PM in response to Loner T

    and the result.......no data found. Maybe I must accept the fact that i lost my windows partition, fix the IOS and reinstall with bootcamp windows and the rest of the software, don't you think? Or do have a more positive opinion?  It seems a difficult case......

    Schermafbeelding 2015-07-07 om 14.17.02.png

  • by Loner T,

    Loner T Loner T Jul 7, 2015 2:28 PM in response to tomfromvleuten
    Level 7 (24,855 points)
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    Jul 7, 2015 2:28 PM in response to tomfromvleuten

    The FAT partition has lost all its NTFS characteristics.

     

    One option to test, before you reinstall OSX and Windows completely and start over again, is to use a tool that comes with Testdisk called PhotoRec. Please see http://www.cgsecurity.org/wiki/PhotoRec for details. Try it and see what you can recover.

     

    Another option is to make the current file system FAT (instead of us trying to make it NTFS) and try to see if Windows Startup Repair will rebuild NTFS. This requires repeating the steps on page 5  and choosing it to be FAT (0B00 or 0C00) rather than NTFS (0700). I suggest you try it, before you completely start over.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 2:37 PM in response to Loner T
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    Jul 7, 2015 2:37 PM in response to Loner T

    oke, i give it a try. How to start up, because Disk /dev/rdisk1 is not working

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 2:40 PM in response to tomfromvleuten
    Level 1 (0 points)
    Jul 7, 2015 2:40 PM in response to tomfromvleuten

    and i think we created 4 New partitions so i start we

    D

    2

    D

    3

    D

    4

    ??????

  • by Loner T,

    Loner T Loner T Jul 7, 2015 2:56 PM in response to tomfromvleuten
    Level 7 (24,855 points)
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    Jul 7, 2015 2:56 PM in response to tomfromvleuten

    You do not need to boot from the internal disks, since you have the ability to boot from an external disk. You do not need to delete any partitions or run Gdisk. There is a simpler method.

     

    Please ignore any i386 MBR errors messages, but stop if you see any others.

     

    sudo fdisk -e /dev/rdisk1

    p

    setpid 4

    0B

    p

    w

    y

     

    Test. Switch 0B to 0C and test again if it fails.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 7, 2015 3:15 PM in response to Loner T
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    Jul 7, 2015 3:15 PM in response to Loner T

    TRied the frist option, iT didnt worked. i can not reboot anymore by using the ALT key, which means i can not select external. After pressing ALT the screen stays black for a while and the it tries to boot iOS and stops. WhT to do?

  • by Loner T,

    Loner T Loner T Jul 7, 2015 4:12 PM in response to tomfromvleuten
    Level 7 (24,855 points)
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    Jul 7, 2015 4:12 PM in response to tomfromvleuten

    Based on your first diskutil list, disk1s4 should be the Microsoft Data. Did it change?

     

    Can you

     

    Resetting the System Management Controller (SMC) on your Mac - Apple Support

    How to Reset NVRAM on your Mac - Apple Support

     

    and try to boot from the external disk using the Alt Key?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 8, 2015 12:34 AM in response to Loner T
    Level 1 (0 points)
    Jul 8, 2015 12:34 AM in response to Loner T

    after many many many attempts i succeded to boot external....... I don't think anything has changed........ see distill list

    I didnt test 0C? only 0B, i it worth trying? 

     

    sudo fdisk -e /dev/rdisk1

    p

    setpid 4

    0C  ?

    p

    w

    y

     

    Schermafbeelding 2015-07-08 om 00.29.22.png

  • by Loner T,

    Loner T Loner T Jul 8, 2015 5:21 AM in response to tomfromvleuten
    Level 7 (24,855 points)
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    Jul 8, 2015 5:21 AM in response to tomfromvleuten

    If the 0B setting did not work, 0C is unlikely to work, but you can try it. Do you have another Mac? If yes, Target Disk Mode is much easier.

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