Too many startup disk options

Discussion in 'macOS' started by Sangoma, Mar 22, 2015.

  1. Sangoma macrumors member

    Joined:
    Dec 27, 2012
    #1
    Hi,

    When I use the option key to see my startup options I see 2 Windows possibilities. In settings, and from Windows Bootcamp Assistant, I only see 2 (OS X and Bootcamp).

    Prior to this I had installed Windows 10, and reverted to Windows 7. I suspect that I have confused a boot record or something. How do I get back to seeing the correct partitions?

    Thanks
     
  2. Bomb Bloke macrumors regular

    Bomb Bloke

    Joined:
    Feb 12, 2015
    Location:
    Tasmania (AU)
    #2
    Shot-in-the-dark guess, but if you boot into Windows 7 and check out msconfig (type it into the Run dialogue you should get via Cmd + R), do you see the extra entry there?
     
  3. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #3
    It will help to know how disks are partitioned.

    In Terminal, please run the following command. Then copy the output, paste it to this topic as code (the # button in the advanced editor).

    diskutil list
     
  4. Sangoma, Apr 2, 2015
    Last edited: Apr 3, 2015

    Sangoma thread starter macrumors member

    Joined:
    Dec 27, 2012
    #4
    This is what diskutil says:

    /dev/disk0
    #: TYPE NAME SIZE IDENTIFIER
    0: GUID_partition_scheme *1.0 TB disk0
    1: EFI EFI 209.7 MB disk0s1
    2: Apple_CoreStorage 872.3 GB disk0s2
    3: Apple_Boot Recovery HD 650.0 MB disk0s3
    4: Microsoft Basic Data BOOTCAMP 127.0 GB disk0s4
    /dev/disk1
    #: TYPE NAME SIZE IDENTIFIER
    0: Apple_HFS Macintosh HD *872.0 GB disk1
    Logical Volume on disk0s2
    CC28B2C1-F847-44A9-8678-BC93D662EA0E
    Unlocked Encrypted


    ----------

    Thanks, but no extra enty here.
     
  5. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #5
    For clarity (as code):

    Code:
    /dev/disk0
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *1.0 TB     disk0
       1:                        EFI EFI                     209.7 MB   disk0s1
       2:          Apple_CoreStorage                         872.3 GB   disk0s2
       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
       4:       Microsoft Basic Data BOOTCAMP                127.0 GB   disk0s4
    /dev/disk1
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:                  Apple_HFS Macintosh HD           *872.0 GB   disk1
                                     Logical Volume on disk0s2
                                     CC28B2C1-F847-44A9-8678-BC93D662EA0E
                                     Unlocked Encrypted
     
  6. Bomb Bloke macrumors regular

    Bomb Bloke

    Joined:
    Feb 12, 2015
    Location:
    Tasmania (AU)
    #6
    Well that doesn't look to be anything out of the ordinary.

    These two Windows options you see - do they actually behave any differently from each other when you select them, or do they both simply boot to the one install?
     
  7. Sangoma thread starter macrumors member

    Joined:
    Dec 27, 2012
    #7
    Unfortunately, they behave differently. One of them is a defunct Windows 10 install. It just crashes. It is also, unfortunately, the one that OS X selects as the alternative in the 'Starup Disk' in system settings.

    I can get to the functional Windows 7 install without problem if I use the Option key at startup.

    Both show as 'Windows' on the startup screen. I only know that I must choose the first one.
     

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