Chewwy65

Q: Lost Partition on internal virtual memory after windows bootcamp

Hi Guys

 

So I recently used the bootcamp function to set up a windows portion to my mac, I am on the Macbook Pro 2012 edition, and using El Capitan.

 

I went through the whole process and left my mac doing the partitioning, when I returned the load screen was just my normal mac one and when I went into disc utilities I could not find the partition I had chosen for the windows portion. i.e. I am now missing 150gb.

 

I need help, either to reset the mac back to the original 500g so I can try again, or is there a way to find the missing partition?

 

I tried a few terminal codes, but am very new. Below are all the partitions I have, note no bootcamp partition or windows at all.

 

Andrews-MacBook-Pro:~ andrewilsley$ diskutil list

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *500.1 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage Macintosh HD            499.2 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

/dev/disk1 (internal, virtual):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Macintosh HD           +349.9 GB   disk1

                                 Logical Volume on disk0s2

 

Thanks and Regards

MacBook Pro (13-inch Mid 2012), OS X El Capitan (10.11.6)

Posted on Jul 19, 2016 9:59 AM

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Q: Lost Partition on internal virtual memory after windows bootcamp

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  • by Lindsay_B.,Helpful

    Lindsay_B. Lindsay_B. Jul 21, 2016 10:14 PM in response to Chewwy65
    Community Specialists
    Jul 21, 2016 10:14 PM in response to Chewwy65

    Hi, Chewwy65!

     

    Thanks for using the Apple Support Communities. Based on your post, I am understanding that you're trying to use Boot Camp Assistant to install Windows on your MacBook Pro, but can't find the partition you created, even though it's clear that the storage space allotted to it is not on your Mac partition. I understand needing that partition available, or at least being able to get the storage from it back, and am happy to help.


    First, try the instructions under the "Remove the partition" section of the following article:

    Set up a Windows partition on your Mac

    If you're not able to remove the partition using Boot Camp Assistant as the article above directs, then back up your Mac partition, erase your hard drive, and reinstall OS X before trying Boot Camp Assistant again.

    If you're not familiar with backing up your data, you can use the article below to walk you setting up and using Time Machine.

    Use Time Machine to back up or restore your Mac

    After you've backed up, go through the steps in the article below to erase your hard drive. Since El Capitan is your startup disk, you'll need to load the computer into Recovery by holding down Command+R on the keyboard while turning on the Mac.

    Disk Utility (El Capitan): Erase a volume

    Then, reinstall OS X using the following article.

    How to reinstall OS X

     

    After OS X has been reinstalled, use the following article to make sure your Mac is compatible with the Windows version you're attempting to install, and then try Boot Camp Assistant again.

    System requirements to install Windows on your Mac using Boot Camp

     

    Cheers!

  • by Loner T,

    Loner T Loner T Jul 21, 2016 7:44 AM in response to Chewwy65
    Level 7 (23,613 points)
    Safari
    Jul 21, 2016 7:44 AM in response to Chewwy65

    Please post the output of

     

    diskutil cs list

  • by Chewwy65,

    Chewwy65 Chewwy65 Jul 21, 2016 10:16 PM in response to Lindsay_B.
    Level 1 (4 points)
    Notebooks
    Jul 21, 2016 10:16 PM in response to Lindsay_B.

    Hi Lindsay_B

     

    Thanks for the above, I ended up doing the erase hard drive idea, reloaded the backup and started the whole load windows again vibe. Worked perfectly the second time so I must have done something or my connection busy out at the wrong time in the first boot camp attempt.

     

    Cheers

  • by Chewwy65,

    Chewwy65 Chewwy65 Jul 21, 2016 10:19 PM in response to Loner T
    Level 1 (4 points)
    Notebooks
    Jul 21, 2016 10:19 PM in response to Loner T

    Hi

     

    Managed to erase and start again.

     

    Though have a new question. When in the windows partition, is there a way I can access my files from Mac partition?

     

    Cheers,

  • by Loner T,

    Loner T Loner T Jul 22, 2016 5:58 AM in response to Chewwy65
    Level 7 (23,613 points)
    Safari
    Jul 22, 2016 5:58 AM in response to Chewwy65

    Chewwy65 wrote:

     

    Though have a new question. When in the windows partition, is there a way I can access my files from Mac partition?

    Based on the problem you encountered, your OS X installation is using a Logical Volume Group and a Logical Volume inside the LVG on the OS X partition. It can be confirmed using the Terminal command I provided. If you have a CS LVG/LV it cannot be read by Windows.

     

    However, if you are not using FIleVault2 or Bitlocker, it may be possible to revert to a underlying file structures and allow read access.

     

    Can you post the output of the diskutil cs list command?

  • by Chewwy65,

    Chewwy65 Chewwy65 Aug 1, 2016 1:11 AM in response to Loner T
    Level 1 (4 points)
    Notebooks
    Aug 1, 2016 1:11 AM in response to Loner T

    Hi There

     

    Here is the output:

     

    Andrews-MacBook-Pro:~ andrewilsley$ diskutil cs list

    No CoreStorage logical volume groups found

    Andrews-MacBook-Pro:~ andrewilsley$

     

    Which does not sound right...

     

    Any ideas?

     

    Cheers

  • by Loner T,

    Loner T Loner T Aug 1, 2016 3:19 AM in response to Chewwy65
    Level 7 (23,613 points)
    Safari
    Aug 1, 2016 3:19 AM in response to Chewwy65

    This is not an error. Can you post the output of

     

    diskutil list

  • by Chewwy65,

    Chewwy65 Chewwy65 Aug 1, 2016 8:47 AM in response to Loner T
    Level 1 (4 points)
    Notebooks
    Aug 1, 2016 8:47 AM in response to Loner T

    This is the result

     

    Andrews-MacBook-Pro:~ andrewilsley$ diskutil list

    /dev/disk0 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *500.1 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:                  Apple_HFS Macintosh HD            349.2 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data BOOTCAMP                150.0 GB   disk0s4

    Andrews-MacBook-Pro:~ andrewilsley$

  • by Loner T,

    Loner T Loner T Aug 1, 2016 8:50 AM in response to Chewwy65
    Level 7 (23,613 points)
    Safari
    Aug 1, 2016 8:50 AM in response to Chewwy65

    In this disk partition configuration, you should be abel to read OSX partition from the Windows side. It use the AppleMNT.sys and AppleHFS.sys drivers. If these drivers are not properly installed, run setup.exe from the Bootcamp folder.

     

    Your original question about 'lost' space does not seem to be the case anymore.

  • by Chewwy65,

    Chewwy65 Chewwy65 Aug 1, 2016 9:01 AM in response to Loner T
    Level 1 (4 points)
    Notebooks
    Aug 1, 2016 9:01 AM in response to Loner T

    Thanks will give it a try and see. Probably need to rerun setup.

     

    And yes, have fixed the issue with the missing partition. Had to factory restore and then just did the process again.