tomfromvleuten
Level 1 (0 points)

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 (24,845 points)
Safari
A:

Was the Yosemite Recovery Update applied to your iMac?

Posted on Jun 30, 2015 4:13 PM

Close
tomfromvleuten

Q: windows boot option is suddenly missing

  • All replies
  • Helpful answers

first Previous Page 4 of 10 last Next

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 1:32 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 1:32 AM in response to Loner T

    Hi, what upgrade? I never changed anything to the original windos partition size? Maybe windows downloaded automatically an update i don't know. From start the windows partition was always small but until a few weeks ago it worked perfectly. The only thing I can think of is the announced  that windows made to upgrade to windows 10 (I was running 7) but I don't think that the download did already start.... 

  • by Loner T,

    Loner T Loner T Jul 5, 2015 5:35 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 5:35 AM in response to tomfromvleuten

    It is unlikely that W10 Upgrade notice is an issue. There is an Installation log of all software installed which contains history that App Store normally does not show. Can you look at the log? You can click on 'Install Date' and sort the list by date. Here is an example from my system.

     

    Software-Installation-Log.png

     

    Most likely, the Yosemite Recovery Update is responsible. Testdisk is unable to show other partitions. Is your Testdisk list from a Deeper Search output, just for confirmation?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 5:51 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 5:51 AM in response to Loner T

    Hi, i can not find the installation log? how do i open it, where is it? About the testdisk, I think that the deeper search comes next. Now i can select a partition from the list and after selecting it shows the command Deeper Search....

    But as i just pressed escape now everything is gone and i see the screen below again. I think i need to do it all again? It took all night.....Schermafbeelding 2015-07-05 om 14.51.37.png

  • by Loner T,

    Loner T Loner T Jul 5, 2015 5:56 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 5:56 AM in response to tomfromvleuten

    1. The Installation log can be found in About This Mac -> System Report -> Software -> Installations.

    2. You have posted screen shots of the Testdisk output. The MS Data entries that we have seen so far do not seem to work. Let us see what you installation log show. It should help determine next steps. You do not need to run it now.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 6:15 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 6:15 AM in response to Loner T

    Schermafbeelding 2015-07-05 om 15.14.35.png

  • by Loner T,

    Loner T Loner T Jul 5, 2015 6:35 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 6:35 AM in response to tomfromvleuten

    The two updates on 3 May 2015 14:49 (OS X Yosemite Herstel-update and OS X Update) are the most likely suspects. Has Windows worked since this date?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 6:40 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 6:40 AM in response to Loner T

    yes, it worked until a week or so ago???

  • by Loner T,

    Loner T Loner T Jul 5, 2015 7:46 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 7:46 AM in response to tomfromvleuten

    The next MS Data entry that we can test is this one. We are still using the the 139GB size rather than the 2880 sectors as Testdisk shows. We are also going to create a Recovery HD part using your Testdisk at the location 1659286408 with size 1269760 sectors to match the current size.

     

    GPT3 StartGPT 3 SizeGPT3 EndSector OffsetNTFS StartNTFS SizeNTFS EndSector Offset (GB)NTFS Size (GB)
    195225536812697601953525127-28247782016710473072929664001964013706-134.6959209139.6972656

     

    We can test the next available MS Data and check if both OS X and Windows will work.

     

    Rebuild GPT2 and GPT3 using start/end offsets and size for HDD.

     

    1. Sudo gdisk /dev/rdisk1
    2. P  (print the full list of parts)
    3. D  (delete)
    4. 2 (part 2)
    5. D (delete)
    6. 3 (part 3)
    7. N  (new part)
    8. 2  (part 2)
    9. 409640 ( - Start offset in sectors or the start point for Bootcamp part)
    10. 1671047306 ( - Absolute end sector)
    11. AF05 (Core Storage part type)
    12. N (new part)
    13. 3 (part 3)
    14. 1659286408 ( - Start offset in sectors or the start point for Bootcamp part)
    15. + 1269760 ( Relative offset End sector)
    16. AB00 (Recovery HD)
    17. N (new part)
    18. 4 (part 4)
    19. 1671047307 ( - Start offset in sectors or the start point for Bootcamp part)
    20. 1964013706 ( - Absolute End sector)
    21. 0700 (NTFS part)
    22. P  (print list of all parts just to see what changes will be made)
    23. W (Write the new GPT)
    24. Y  (Yes! really write the new GPT)


    This will delete and re-write the GPT partition info for /dev/disk0s2, /dev/disk0s3 and /dev/disk0s4.


    You need to Reboot for OSX to read the new partition information.


    Please post the output of


    sudo gpt -vv -r show /dev/disk1


    Please also test booting from the internal disk OSX partition.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 7:58 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 7:58 AM in response to Loner T

    Hi, it does not accept bullet 14 ?

    Schermafbeelding 2015-07-05 om 16.55.39.png

  • by Loner T,

    Loner T Loner T Jul 5, 2015 9:00 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 9:00 AM in response to tomfromvleuten

    Type 'q' to quit out of this session. Start again and change step 10 to 1659286407 (one sector before the start of Recovery HD), this will avoid overlapping partitions and run the Gdisk steps and test.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 9:16 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 9:16 AM in response to Loner T

    please check if i can proceed: moved requested sector from....to.....Schermafbeelding 2015-07-05 om 18.15.21.png

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 9:20 AM in response to tomfromvleuten
    Level 1 (0 points)
    Jul 5, 2015 9:20 AM in response to tomfromvleuten

    it does not accept 1964013706 as last sector. (bullet 20)

  • by Loner T,

    Loner T Loner T Jul 5, 2015 9:23 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 9:23 AM in response to tomfromvleuten

    Use 'l' to make the alignment to 1 sector and retry.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 5, 2015 9:30 AM in response to Loner T
    Level 1 (0 points)
    Jul 5, 2015 9:30 AM in response to Loner T

    Hi, it does not work :-(

    Schermafbeelding 2015-07-05 om 18.29.30.png

  • by Loner T,

    Loner T Loner T Jul 5, 2015 9:35 AM in response to tomfromvleuten
    Level 7 (24,845 points)
    Safari
    Jul 5, 2015 9:35 AM in response to tomfromvleuten

    Go to main menu, x to experts menu, l to 1, and try the strps again.

first Previous Page 4 of 10 last Next