Ian999
Level 1 (4 points)
Mac OS X

Q: Help - my ssd is missing 40gb, after I tried to install Bootcamp

Here is the situation. A few weeks back I tried to install bootcamp and windows. It did not go well, but lets forget windows for the moment.

 

The problem is that I partitioned my Macbook Air's ssd, creating a new windows 40gb in size. The win install did not work, but now, I cannot recover the 40gb. In fact, it is invisible. I thought I could fix this myself, I waited for this weekend when I had the time. I superdupered a copy of my ssd to an external drive, and attempted to reformat the entire ssd, with the intent of copying the external drive contents back onto the ssd. It did not work.

 

Disk utility could not erase my ssd. The message was that there was a discrepancy with the drive size, and that was that.

 

I have no more ideas. Can anyone suggest how I can get my missing 40gb back?

 

Many thanks to anyone who can help.

MacBook Air, OS X El Capitan (10.11)

Posted on Apr 10, 2016 8:00 AM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (23,898 points)
Safari
A:

Yes, as long as the external drive and the internal drive have the same OS X version (10.n.m) installed. For example, you want to avoid booting from 10.8.5 to fix this, if you are on El Capitan (10.11.4). Minor versions (like the .4 in 10.11.4 - that is m ) can be different, but it is highly recommended that they be the same.

Posted on Apr 11, 2016 8:05 PM

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Ian999

Q: Help - my ssd is missing 40gb, after I tried to install Bootcamp

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  • by Acm001,

    Acm001 Acm001 Apr 10, 2016 8:37 AM in response to Ian999
    Level 3 (623 points)
    iPhone
    Apr 10, 2016 8:37 AM in response to Ian999

    If you used boot camp to partition the drive you would use it to remove that windows partition. Run bootcamp again and pick remove bootcamp partition.

  • by Ian999,

    Ian999 Ian999 Apr 10, 2016 8:55 AM in response to Acm001
    Level 1 (4 points)
    Mac OS X
    Apr 10, 2016 8:55 AM in response to Acm001

    Thanks. A good idea, but I just ran bootcamp. I could not see an option to remove the windows partition. BC just wanted to install windows.

    If I don't reply immediately, it is because I am in timezone plus 7, and it is not sleepy time.

    Good night.

  • by Acm001,

    Acm001 Acm001 Apr 10, 2016 9:22 AM in response to Ian999
    Level 3 (623 points)
    iPhone
    Apr 10, 2016 9:22 AM in response to Ian999

    Did you originally use bootcamp to create the partition to install windows? If yes then it would give you the option to remove. But if you used some other method to create the partition - disk utility or some other program - what you used and how you did would help to help you.

  • by Ian999,

    Ian999 Ian999 Apr 10, 2016 11:54 PM in response to Acm001
    Level 1 (4 points)
    Mac OS X
    Apr 10, 2016 11:54 PM in response to Acm001

    I used bootcamp, nothing else.

    Disk utility correctly states 500gb capacity, but also shows only one partition of 467gb. No mention of the missing space.

     

    If this helps, from DU:

     

    Incorrect size for volume

    Problems were found with the partition map

  • by Acm001,

    Acm001 Acm001 Apr 11, 2016 10:05 AM in response to Ian999
    Level 3 (623 points)
    iPhone
    Apr 11, 2016 10:05 AM in response to Ian999

    Do you have a bootable install usb? If yes try this. Boot to the installer got to disk utility. Try to expand the drive to include the lost space. Run first aid on the disk.

    http://www.macworld.com/article/2987201/operating-systems/hands-on-with-disk-uti lity-in-el-capitan-tool-for-storage-devices-gets-a-facelift.html

  • by Ian999,

    Ian999 Ian999 Apr 11, 2016 6:23 PM in response to Acm001
    Level 1 (4 points)
    Mac OS X
    Apr 11, 2016 6:23 PM in response to Acm001

    Here is what I did.

    I have a bootable external drive (superduper copy of my ssd). I booted from that and ran disk utils. The report was:

     

    Incorrect size for volume "The Garden" (my volume)

    Problems were found with the partition map which might prevent booting

     

     

    I then tried to erase my ssd, while still booted from the external drive. The error message was:

     

    Unmounting disk

    Couldn't open device

    Operation failed...

     

     

    So, no joy. It appears that the missing space is invisible, due to an error with the ssd? Any advice on how to proceed appreciated.

  • by Loner T,

    Loner T Loner T Apr 11, 2016 6:44 PM in response to Ian999
    Level 7 (23,898 points)
    Safari
    Apr 11, 2016 6:44 PM in response to Ian999

    Apologies for barging in Acm001.

     

    Ian999 , please post the output of

     

    diskutil list

    diskutil cs list

    sudo gpt -vv -r show /dev/diskN

     

    Please substitute the value N where N points to the internal SSD. It should be disk0, but please verify.

  • by Ian999,

    Ian999 Ian999 Apr 11, 2016 7:15 PM in response to Loner T
    Level 1 (4 points)
    Mac OS X
    Apr 11, 2016 7:15 PM in response to Loner T

    I did a and b. Option c looks a bit dramatic.

    Could you please check these outputs to see if option c is warranted.

    Thanks.

     

    Here goes:

     

    a.

    Traveller:~ Traveller$ diskutil list

    /dev/disk0 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *500.3 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:          Apple_CoreStorage The Garden              499.4 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

    /dev/disk1 (internal, virtual):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS The Garden             +467.1 GB   disk1

                                     Logical Volume on disk0s2

                                     1186F0BF-8586-4158-B847-09C7117298AA

                                     Unencrypted

     

    b.

    Traveller:~ Traveller$ diskutil cs list

    CoreStorage logical volume groups (1 found)

    |

    +-- Logical Volume Group 6C6A3224-4CE2-4C9E-B855-A3B4B293A74A

        =========================================================

        Name:         The Garden

        Status:       Online

        Size:         499418030080 B (499.4 GB)

        Free Space:   31998951424 B (32.0 GB)

        |

        +-< Physical Volume D3111097-D4D0-41AA-9386-C3044127EB6E

        |   ----------------------------------------------------

        |   Index:    0

        |   Disk:     disk0s2

        |   Status:   Online

        |   Size:     499418030080 B (499.4 GB)

        |

        +-> Logical Volume Family DC4F222C-31C7-43CA-B50A-4B54DEE9D56A

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

            Encryption Type:         None

            |

            +-> Logical Volume 1186F0BF-8586-4158-B847-09C7117298AA

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

                Disk:                  disk1

                Status:                Online

                Size (Total):          467082481664 B (467.1 GB)

                Revertible:            No

                LV Name:               The Garden

                Volume Name:           The Garden

                Content Hint:          Apple_HFS

  • by Loner T,

    Loner T Loner T Apr 11, 2016 7:22 PM in response to Ian999
    Level 7 (23,898 points)
    Safari
    Apr 11, 2016 7:22 PM in response to Ian999
    Free Space:   31998951424 B (32.0 GB)

    This is your missing disk space. There is no need for the last command. Boot into Internet Recovery (not Local Recovery), and run the following two commands.

     

    diskutil cs resizeVolume 1186F0BF-8586-4158-B847-09C7117298AA 0g

    diskutil repairDisk disk0

     

    Reboot and test.

     

    Here is the help for both the commands.

     

    diskutil cs resizeVolume

    Usage:  diskutil coreStorage resizeVolume

            lvUUID|MountPoint|DiskIdentifier|DeviceNode size

    Resize a logical volume, which is one of one or more disks that consume storage

    out of a logical volume group. The logical volume group will have more or less

    available space after this operation, if it was a shrink or grow, respectively.

    Specifying zero as the size asks for an "automatic" fit-to-fill-LVG operation.

    Example: diskutil coreStorage resizeVolume

             11111111-2222-3333-4444-555555555555 10g

     

    diskutil repairDisk

    Usage:  diskutil repairDisk MountPoint|DiskIdentifier|DeviceNode

    Repair the required layout and components of the partition map of a whole disk.

    Ownership of the affected disk is required.

  • by Ian999,

    Ian999 Ian999 Apr 11, 2016 7:25 PM in response to Loner T
    Level 1 (4 points)
    Mac OS X
    Apr 11, 2016 7:25 PM in response to Loner T

    Ok, will do. Fingers crossed.

  • by Ian999,

    Ian999 Ian999 Apr 11, 2016 7:50 PM in response to Ian999
    Level 1 (4 points)
    Mac OS X
    Apr 11, 2016 7:50 PM in response to Ian999

    I cannot boot into internet recovery mode. Is booting from an external drive effectively the same? Same commands and so forth?

  • by Loner T,Solvedanswer

    Loner T Loner T Apr 11, 2016 8:05 PM in response to Ian999
    Level 7 (23,898 points)
    Safari
    Apr 11, 2016 8:05 PM in response to Ian999

    Yes, as long as the external drive and the internal drive have the same OS X version (10.n.m) installed. For example, you want to avoid booting from 10.8.5 to fix this, if you are on El Capitan (10.11.4). Minor versions (like the .4 in 10.11.4 - that is m ) can be different, but it is highly recommended that they be the same.

  • by Ian999,

    Ian999 Ian999 Apr 11, 2016 8:08 PM in response to Loner T
    Level 1 (4 points)
    Mac OS X
    Apr 11, 2016 8:08 PM in response to Loner T

    The external is a copy of the ssd, so identical. Will give it a shot.

  • by Ian999,

    Ian999 Ian999 Apr 11, 2016 8:32 PM in response to Loner T
    Level 1 (4 points)
    Mac OS X
    Apr 11, 2016 8:32 PM in response to Loner T

    Phew!

     

    All ok. The missing space has been restored. Thanks for your help Loner.

     

    Now if you can just double the storage size of my ssd, that would be great.

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