Loner T

Q: Bootcamp and Yosemite upgrade - potential data loss warning

There are two specific cases that I am currently aware of which indicate potential data loss during Yosemite upgrade.

 

Please see

 

"Missing Operating system_ " After installing Yosemite

Windows 7 partition gone after installing Yosemite

 

This is the other side affect of Yosemite upgrade, which is lost functionality

 

windows 8 does not recognise Macintosh HD, No drive Letter

 

Please avoid an upgrade to Yosemite if you also have Bootcamp, till the data loss issue has been investigated and root cause established.

Posted on Oct 17, 2014 9:56 PM

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Q: Bootcamp and Yosemite upgrade - potential data loss warning

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  • by drizzy19,

    drizzy19 drizzy19 Nov 30, 2014 7:22 PM in response to Loner T
    Level 1 (0 points)
    Nov 30, 2014 7:22 PM in response to Loner T

    Hey Loner T,

     

    I created the new thread here:https://discussions.apple.com/message/26869460#26869460

     

    Thanks for your help!

  • by Loner T,

    Loner T Loner T Nov 30, 2014 7:36 PM in response to drizzy19
    Level 7 (23,813 points)
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    Nov 30, 2014 7:36 PM in response to drizzy19

    This points to my Data loss thread. You may have a different link for your thread.

  • by drizzy19,

    drizzy19 drizzy19 Nov 30, 2014 10:03 PM in response to Loner T
    Level 1 (0 points)
    Nov 30, 2014 10:03 PM in response to Loner T

    Bah, yep. Apologies, though it seems you already found it anyway.

     

    Can't install Windows using Bootcamp after Yosemite Upgrade

  • by tdho,

    tdho tdho Jan 5, 2015 11:23 AM in response to Loner T
    Level 1 (4 points)
    Jan 5, 2015 11:23 AM in response to Loner T

    Hi Loner T. I'm new to this topic, but I've read lots of problems regarding hybrid MBR bootcamp.

    I heard that EFI bootcamp won't cause that much problem, and apple began to support EFI on their products since 2013 generation.

    I got macbook pro 15" mid 2012 (MD103), I did a little research on google, and I found this -> EFI and SMC firmware updates for Intel-based Macs - Apple Support

     

    If I update the firmware, does it make my MBP got EFI bootcamp?

    I've read your instruction to upgrade OS X on hybrid MBR using winclone, but I thought it would be nice if I could get my MBP to work on EFI.

     

    I post my question here, so I hope that you would help me. Since you are good at this topic.

    I might create a new thread after this. Sorry for my english.

  • by Loner T,

    Loner T Loner T Jan 5, 2015 7:10 PM in response to tdho
    Level 7 (23,813 points)
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    Jan 5, 2015 7:10 PM in response to tdho

    tdho wrote:

     

    I got macbook pro 15" mid 2012 (MD103), I did a little research on google, and I found this -> EFI and SMC firmware updates for Intel-based Macs - Apple Support

     

    If I update the firmware, does it make my MBP got EFI bootcamp?

    From How to identify MacBook Pro models - Apple Support your MBP is MacBookPro9,1, which is considered a preUEFI model in the BC Info.plist. I am not aware of Apple retrofitting Macs for UEFI support.

     

    <key>PreUEFIModels</key>

            <array>

                    <string>MacBook7</string>

                    <string>MacBookAir5</string>

                    <string>MacBookPro10</string>

                    <string>MacPro5</string>

                    <string>Macmini6</string>

                    <string>iMac13</string>

            </array>

     

    Despite this, I have tried EFI on a 13" 2012 MBP with Windows 8.1 and have had limited success in a full EFI boot.

    I've read your instruction to upgrade OS X on hybrid MBR using winclone, but I thought it would be nice if I could get my MBP to work on EFI.

    You should still try an EFI boot and see if newer drivers may be able to help, if possible and the Mac you have may be unavailable for a day or two. Please ensure you have backups of OSX and Windows, before you make any changes.

  • by mrgazz,

    mrgazz mrgazz Feb 10, 2015 9:51 AM in response to Loner T
    Level 1 (0 points)
    Feb 10, 2015 9:51 AM in response to Loner T

    Hi Loner T,

     

    I created a new thread here with my problem.  Thank you in advance for all the help you have given everyone! - Mike

     

    Repairing boot camp after OS install 10.10.2

  • by GangsterChicken,

    GangsterChicken GangsterChicken Mar 17, 2015 1:07 PM in response to mrgazz
    Level 1 (0 points)
    Mar 17, 2015 1:07 PM in response to mrgazz

    Would it make sense to backup all the data in your Windows OS, "undo" the partition and go back to how you had your computer before installing Windows using Bootcamp.  Then install the update to Yosemite, and redo the whole process of installing Windows using Bootcamp in the new Yosemite OS?

     

    I haven't tried it, does this sound reasonable?

  • by A-L-P-H-A,

    A-L-P-H-A A-L-P-H-A Jul 28, 2015 4:23 AM in response to Loner T
    Level 1 (0 points)
    Jul 28, 2015 4:23 AM in response to Loner T

    I didn't know that the devs could be such morons!

    I suppose I should make a fresh install of windows after the upgrade

    tnx Loner

  • by Loner T,

    Loner T Loner T Jul 28, 2015 4:25 AM in response to A-L-P-H-A
    Level 7 (23,813 points)
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    Jul 28, 2015 4:25 AM in response to A-L-P-H-A

    Can you post a new discussion and include the output of the following Terminal commands? It may be possible to salvage the current installation.

     

    diskutil list

    diskutil cs list

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk0

     

    The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

  • by shaunfromkybong,

    shaunfromkybong shaunfromkybong Oct 19, 2015 3:42 AM in response to Loner T
    Level 1 (0 points)
    Oct 19, 2015 3:42 AM in response to Loner T

    Hi Loner, I am trying to fix my bootcamp but I cannot follow these forums. Could you please help?

     

    Last login: Mon Oct 19 20:40:26 on ttys000

    Shauns-MacBook-Pro:~ shaunward$ 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            300.0 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data                         20.0 GB    disk0s4

    /dev/disk1 (internal, virtual):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           +299.6 GB   disk1

                                     Logical Volume on disk0s2

                                     06982F89-8A63-494B-94FD-414D3FB68815

                                     Unencrypted

    Shauns-MacBook-Pro:~ shaunward$ diskutil cs list

    CoreStorage logical volume groups (1 found)

    |

    +-- Logical Volume Group EABF9C2F-6780-4FEA-96BB-3BB71720340E

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

        Name:         Macintosh HD

        Status:       Online

        Size:         299999997952 B (300.0 GB)

        Free Space:   18919424 B (18.9 MB)

        |

        +-< Physical Volume 4F2BB37D-8F1F-4E4C-8D6B-A7427648EF51

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

        |   Index:    0

        |   Disk:     disk0s2

        |   Status:   Online

        |   Size:     299999997952 B (300.0 GB)

        |

        +-> Logical Volume Family 119E1CA6-3759-4C7E-A799-261E70EA183A

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

            Encryption Type:         AES-XTS

            Encryption Status:       Unlocked

            Conversion Status:       Converting (backward)

            Reversion State:         Decrypting

            High Level Queries:      Not Fully Secure

            |                        Has Visible Users

            |                        Has Volume Key

            |

            +-> Logical Volume 06982F89-8A63-494B-94FD-414D3FB68815

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

                Disk:                  disk1

                Status:                Online

                Size (Total):          299628756992 B (299.6 GB)

                Conversion Progress:   32%

                Revertible:            Yes (unlock and decryption required)

                LV Name:               Macintosh HD

                Volume Name:           Macintosh HD

                Content Hint:          Apple_HFS

    Shauns-MacBook-Pro:~ shaunward$ sudo gpt -vv -r show /dev/disk0

    gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

    gpt show: /dev/disk0: Suspicious MBR at sector 0

    gpt show: /dev/disk0: Pri GPT at sector 1

    gpt show: /dev/disk0: Sec GPT at sector 976773167

          start       size  index  contents

              0          1         MBR

              1          1         Pri GPT header

              2         32         Pri GPT table

             34          6        

             40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

         409640  585937496      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      586347136    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      587616672  350094944        

      937711616   39061504      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      976773120         15        

      976773135         32         Sec GPT table

      976773167          1         Sec GPT header

    Shauns-MacBook-Pro:~ shaunward$ sudo fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 60801/255/63 [976773168 sectors]

    Signature: 0xAA55

             Starting       Ending

    #: id  cyl  hd sec -  cyl  hd sec [     start -       size]

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

    1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>

    2: AC 1023 254  63 - 1023 254  63 [    409640 -  585937496] <Unknown ID>

    3: AB 1023 254  63 - 1023 254  63 [ 586347136 -    1269536] Darwin Boot

    4: 0C 1023 254  63 - 1023 254  63 [ 937711616 -   39061504] Win95 FAT32L

    Shauns-MacBook-Pro:~ shaunward$

  • by Loner T,

    Loner T Loner T Oct 19, 2015 4:35 AM in response to shaunfromkybong
    Level 7 (23,813 points)
    Safari
    Oct 19, 2015 4:35 AM in response to shaunfromkybong

    Can you start a new discussion (Find answers and ask new questions ) and post this information on the new thread to avoid confusion?

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