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 (24,845 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 9, 2015 11:42 AM in response to tomfromvleuten
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    Jul 9, 2015 11:42 AM in response to tomfromvleuten

    You currently have

     

    disk0 (SSD) - Empty

    disk1 (HDD) - OSX and Recovery HD and Bootcamp.

    disk2  - WININSTALL - This may cause problems when installing Windows. Can you use a 8+ GB USB2  flash drive instead of this disk?

    disk3 - this should be ejected. Adobe Installer.

    disk4,5 - These look like your Windows Installation Media.

    disk6 - ?

     

    When the OSX was installed, it did not rebuild the Fusion drive.

     

    You have the following options.

     

    1. Split the SSD into two equal parts - OSX (60GB) and Bootcamp (60GB). Install Windows. Rebuild the Fusion drive using SSD (60GB) part and the entire HDD.

    2. Install Windows on the HDD Bootcamp part on disk1. Backup OSX. Rebuild Fusion disk and restore the backup of OSX to the Fusion drive.

    3. Same as 1, but split the HDD in half as well. Make one half a part of the Fusion disk for OSX, and use the second HDD part as 'shared' storage between OSX and Windows by using FAT or exFAT file system. (My Macminis are setup this way. This gives me SSD speeds for both OSes.) The downside is that the C: OS drive for Windows is only 60GB. I use the HDD part as Windows D: drive after the split.

     

    Once you pick an option, we can proceed further.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 9, 2015 12:28 PM in response to Loner T
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    Jul 9, 2015 12:28 PM in response to Loner T

    Hi, i think i must go for option 2.

    I checked for a flashdrive but dont have any, can we do without?

    i add a new diskutil list:

    Schermafbeelding 2015-07-09 om 21.27.29.png

  • by Loner T,

    Loner T Loner T Jul 9, 2015 12:35 PM in response to tomfromvleuten
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    Jul 9, 2015 12:35 PM in response to tomfromvleuten

    1. Backup OSX as it is now.

    2. Do not use Untitled.

    3. Try to install using the 1TB WININSTALL and the HDD Bootcamp Part. Pick Macintosh HD, NO NAME.

    4. After Windows is fully installed, post the output of sudo fdisk /dev/disk1 (this will record the MBR on this discussion).

    5. We can rebuild the Fusion drive without touching the BC partition and restore OSX from the backup made in step 1.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 9, 2015 12:37 PM in response to Loner T
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    Jul 9, 2015 12:37 PM in response to Loner T

    just to make sure, by backing up OSX you mean timemachine backup?

  • by Loner T,

    Loner T Loner T Jul 9, 2015 12:46 PM in response to tomfromvleuten
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    Jul 9, 2015 12:46 PM in response to tomfromvleuten

    Yes. Once you have TM backup, we can erase the SSD/HDD (OSX Part) and rebuild it into a Fusion drive.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 9, 2015 1:01 PM in response to Loner T
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    Jul 9, 2015 1:01 PM in response to Loner T

    Ones the TM backup is ready i will try to install using bootcamp and the external 1TB (wininstall) to install windows on Macintosh HD No Name. This wil make it One OS X partition. Is this right?

    Will OS X still boot then?

  • by Loner T,

    Loner T Loner T Jul 9, 2015 1:13 PM in response to tomfromvleuten
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    Jul 9, 2015 1:13 PM in response to tomfromvleuten

    The TM backup is for restoring your OSX side only.

     

    Your BC partition is on the HDD. We will leave it untouched. We will erase the other partitions (disk1s2 and disk1s3) and create a Fusion drive using disk0s2 (SSD) and disk1s2 (HDD) and then restore OSX. to this Fusion drive.

     

    The BC part will be left untouched. If we run into any issues, we can rebuild the MBR on disk1. Yes, after the restore, OSX should also boot properly.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 9, 2015 2:08 PM in response to Loner T
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    Jul 9, 2015 2:08 PM in response to Loner T

    windows has been installed. What is the next step?

    Schermafbeelding 2015-07-09 om 23.06.07.png

  • by Loner T,

    Loner T Loner T Jul 9, 2015 3:06 PM in response to tomfromvleuten
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    Jul 9, 2015 3:06 PM in response to tomfromvleuten

    Are you able to switch between OS X and Windows without any issues and are the Bootcamp drivers fully installed?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 1:28 AM in response to Loner T
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    Jul 10, 2015 1:28 AM in response to Loner T

    hi, yes i can switch between ios and windows but it doesnt look like all the drivers are installed. For exemple the videocard, in devicemanager i do not see my videocard but it shows a standard card. The builtin camera is also missing

  • by Loner T,

    Loner T Loner T Jul 10, 2015 3:38 AM in response to tomfromvleuten
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    Jul 10, 2015 3:38 AM in response to tomfromvleuten

    On your BC USB, there is a Bootcamp folder which contains a setup.exe. Can you run it and check Device Manager for any unknown devices?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 4:55 AM in response to Loner T
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    Jul 10, 2015 4:55 AM in response to Loner T

    Hi, the setup installed all the missing devices. Windows is as it was before :-)

  • by Loner T,

    Loner T Loner T Jul 10, 2015 5:44 AM in response to tomfromvleuten
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    Jul 10, 2015 5:44 AM in response to tomfromvleuten

    1. Backup OSX on an external TM disk to Time Capsule.

    2. Do you have an external device where you can create a NTFS partition and backup Windows?

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 5:48 AM in response to Loner T
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    Jul 10, 2015 5:48 AM in response to Loner T

    Hi, the TM backup is ready and i have an external for window to back it up

  • by Loner T,

    Loner T Loner T Jul 10, 2015 7:00 AM in response to tomfromvleuten
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    Jul 10, 2015 7:00 AM in response to tomfromvleuten

    Can you post the output of the diskutil list just for recording purposes?

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