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 (24,825 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 9 of 10 last Next

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 7:07 AM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 7:07 AM in response to Loner T

    Schermafbeelding 2015-07-10 om 16.06.59.png

  • by Loner T,

    Loner T Loner T Jul 10, 2015 7:18 AM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 7:18 AM in response to tomfromvleuten

    The procedure is as follows.

     

    1. Merge disk1s2 and disks3 - diskutil mergePartitions JHFS+ disk1s2 disk1s3. You will lose Recovery HD. Please post the output of sudo fdisk /dev/disk1 after this step to verify that MBR is intact.

    2. Reboot and test OSX and Windows.

    3. Create a Fusion drive using disk0s2 and disk1s2 (disk1s3 has been deleted in step 1).

         a. diskutil cs create OSX-MacintoshLVG disk0s2 disk1s2 (the order is important and the SSD should be first. This creates a LV Group).

         b. diskutil cs createVolume OSX-MacintoshLVG jhfs+ "Macintosh HD" 100% (this creates a new LV using 100% disk space from disk0s2 and disk1s2).

         c. Restore from TM Backup to Macintosh HD. Please make sure you use Macintosh HD as the destination.

         d. Post the output of sudo fdisk /dev/disk1 and test OSX and Windows.

    4. Backup OSX and Windows as a new baseline.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 11:41 AM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 11:41 AM in response to Loner T

    i dont think it worked??? did it?

    Schermafbeelding 2015-07-10 om 20.40.22.png

  • by Loner T,

    Loner T Loner T Jul 10, 2015 11:52 AM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 11:52 AM in response to tomfromvleuten

    I always invariable forget the name when merging. .

     

    Please use the following command...

     

    diskutil mergePartitions JHFS+ "Macintosh HD" disk1s2 disk1s3

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 12:30 PM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 12:30 PM in response to Loner T

    Schermafbeelding 2015-07-10 om 21.29.42.png

  • by Loner T,

    Loner T Loner T Jul 10, 2015 12:34 PM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 12:34 PM in response to tomfromvleuten

    This looks fine. Please test OSX and Windows booting and switching.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 12:39 PM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 12:39 PM in response to Loner T

    works perfectly :-)

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 12:40 PM in response to tomfromvleuten
    Level 1 (0 points)
    Jul 10, 2015 12:40 PM in response to tomfromvleuten

    can i make the next steps?  step 3?

  • by Loner T,

    Loner T Loner T Jul 10, 2015 12:50 PM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 12:50 PM in response to tomfromvleuten

    Yes, please. You will lose OSX completely, so you should boot from the external boot for step 3.

     

    diskutil cs create

    Usage:  diskutil coreStorage create lvgName

            MountPoint|DiskIdentifier|DeviceNode ...

    Create a CoreStorage logical volume group from one or more disks.

    The specified disks will become the initial set of PVs.

    All existing data on the drive will be lost.

    Ownership of the affected disk is required.

    Example: diskutil coreStorage create MyLVG disk1

     

    diskutil cs createvolume

    Usage:  diskutil coreStorage createVolume lvgUUID|lvgName type name size

            [-stdinpassphrase | -passphrase [passphrase]]

    Add a new logical volume to a CoreStorage logical volume group.

     

    Type is the file system to initialize on the new logical volume. Valid types

    are Journaled HFS+ or Case-sensitive Journaled HFS+ or their aliases.

     

    Size is the amount of space to allocate from the parent logical volume group.

    Valid sizes are floating-point numbers with a suffix of B(ytes), S(512-byte-

    blocks), K(ilobytes), M(egabytes), G(igabytes), T(erabytes), P(etabytes),

    or (%) a percentage of the current size of the logical volume group.

     

    Example: diskutil coreStorage createVolume

             11111111-2222-3333-4444-555555555555 jhfs+ myLV 10g

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 12:50 PM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 12:50 PM in response to Loner T

    error?

    Schermafbeelding 2015-07-10 om 21.50.18.png

  • by Loner T,

    Loner T Loner T Jul 10, 2015 1:02 PM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 1:02 PM in response to tomfromvleuten

    Did you boot from the external OSX Boot device? Your disk1s2 is your internal OSX boot and needs to be erased.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 1:13 PM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 1:13 PM in response to Loner T

    no i did not boot from the internal drive? It is not even in..... ?

  • by Loner T,

    Loner T Loner T Jul 10, 2015 1:17 PM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 1:17 PM in response to tomfromvleuten

    Are you able to boot into Internet Recovery Console (Command+Opt+R - with the spinning globe) and disconnect any external storage. Use Utilities -> Terminal. You already have a CS volume now. You will just need to add disk1s2 to the fusion drive.

     

    You can post the output of diskutil cs list to confirm.

  • by tomfromvleuten,

    tomfromvleuten tomfromvleuten Jul 10, 2015 1:35 PM in response to Loner T
    Level 1 (0 points)
    Jul 10, 2015 1:35 PM in response to Loner T

    in disk utility i see

     

    121.33 GB APPLE SSD S.

        - untitled

    1 TB APPLE HDD ST1000....

        - MAcintosh HD

        - BOOTCAMP

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

    (the globe) disk 2

         - OS X Base System

     

    i can unmount

    untitled

    Macintosh

    Bootcamp

     

    Thats

  • by Loner T,

    Loner T Loner T Jul 10, 2015 1:45 PM in response to tomfromvleuten
    Level 7 (24,825 points)
    Safari
    Jul 10, 2015 1:45 PM in response to tomfromvleuten

    Can you run the commands in step 3?

first Previous Page 9 of 10 last Next