Q: Missing bootcamp win7 after updating the mac to OS X Yosemite

Help!

After upgrading to Yosemite, and now when I ALT Boot Windows 7 and Recovery partitions no longer show up. Is there any ways to get my data in the disk back?

The Disk Utility is like this:

Following Loner T, I tried some commands, It shows like this:

Failing loss the material, here I seek help from Loner T

Thanks ! Waiting online

Windows error loading after Yosemite upgrade

MacBook Air, OS X Yosemite (10.10), dual system: mac and win7

Posted on Oct 24, 2014 6:56 PM

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Q: Missing bootcamp win7 after updating the mac to OS X Yosemite

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by Loner T,

Loner T Oct 31, 2014 9:20 AM in response to rubby0913
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Oct 31, 2014 9:20 AM in response to rubby0913

On your machine Recovery HD and everything after it was deleted including Apple_Boot to get Windows to work, as shown by your diskutil list output. The only method to get it back correctly is to re-install Yosemite.

Can you post the output of diskutil cs list?

On a working system, this is what I have...

diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *256.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         128.2 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 OSY-MBP13              *126.4 GB   disk1
                                 Logical Volume on disk0s2
                                 8A0116D5-7E1E-44D8-B2A0-8D4E4D48298D
                                 Unencrypted
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by rubby0913,

rubby0913 Oct 31, 2014 9:38 AM in response to Loner T
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Oct 31, 2014 9:38 AM in response to Loner T

Here is the output:
Ok, do you mean if I re-install the Mac OSX, I can also enter my windows system? If the apple_boot can be fixed up, does it mean I can get back the mac system?
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by rubby0913,

rubby0913 Oct 31, 2014 9:46 AM in response to rubby0913
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Oct 31, 2014 9:46 AM in response to rubby0913

I wish the last choice is re-install the system Mac or startup repair the windows. If re_install is the only choice, should I take the startup repair of windows or re-install the mac system first?

another question is can we just re-built the apple_boot file?
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by Loner T,

Loner T Oct 31, 2014 9:47 AM in response to rubby0913
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Oct 31, 2014 9:47 AM in response to rubby0913

Please reinstall Yosemite first. Windows can be fixed when the internal disk can be accessed. Make sure you pick the correct partition to re-install OSX. Do not erase the internal disk at any cost, otherwise Windows will be lost.
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by rubby0913,

rubby0913 Oct 31, 2014 9:59 AM in response to Loner T
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Oct 31, 2014 9:59 AM in response to Loner T

so, what I should do now is reboot the computer without USB drive, and hold the option+command+R when start showing :
it shows four options:
1, back up from time Machine to repair
2. re-install OS X
3. require online help
4. disk utility

and I choose the re-install OSX, right?

also I want to make sure is the patition I can re-install MAC system is the used-being MAC system (D: disk) in the past?
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by Loner T,

Loner T Oct 31, 2014 10:06 AM in response to rubby0913
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Oct 31, 2014 10:06 AM in response to rubby0913

Yes, use Option 2, and select Macintosh HD.
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by rubby0913,

rubby0913 Oct 31, 2014 10:23 AM in response to Loner T
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Oct 31, 2014 10:23 AM in response to Loner T

during reinstall, it shows only like this
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by Loner T,

Loner T Oct 31, 2014 10:25 AM in response to rubby0913
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Oct 31, 2014 10:25 AM in response to rubby0913

I cannot see the image. Can you post the image using an external image sharing site, like IMGUR?
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by rubby0913,

rubby0913 Oct 31, 2014 10:29 AM in response to Loner T
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Oct 31, 2014 10:29 AM in response to Loner T

Osx cannot be installed at Macintosh HD
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by Loner T,

Loner T Oct 31, 2014 10:30 AM in response to rubby0913
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Oct 31, 2014 10:30 AM in response to rubby0913

Can you erase just Macintosh HD, nothing else?
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by rubby0913,

rubby0913 Oct 31, 2014 10:51 AM in response to Loner T
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Oct 31, 2014 10:51 AM in response to Loner T

Only this one , no other else, when I insert USB drive, it is like this
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by Loner T,

Loner T Oct 31, 2014 10:57 AM in response to rubby0913
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Oct 31, 2014 10:57 AM in response to rubby0913

This is installing Mountain Lion, not Yosemite. This means you have to install ML and then upgrade to Yosemite. Do you want me to give you commands to erase just the Macintosh HD?

You should not plug-in the USB when using Command+Opt+R.
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by rubby0913,

rubby0913 Oct 31, 2014 11:03 AM in response to Loner T
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Oct 31, 2014 11:03 AM in response to Loner T

IIs this the only choice?!
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by Loner T,

Loner T Oct 31, 2014 11:53 AM in response to rubby0913
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Oct 31, 2014 11:53 AM in response to rubby0913

I do not see any other choice. You have a CoreStorage volume that is not working.

Can you post a text version of diskutil cs list?
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by rubby0913,

rubby0913 Nov 1, 2014 12:38 AM in response to Loner T
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Nov 1, 2014 12:38 AM in response to Loner T

sorry for replying you late. Here are output of diskutil cs list

wuguangtoshitekiMacBook-Air:~ wufuting$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group F4627B26-9663-428D-B24D-79F2674CFC4F
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         99999997952 B (100.0 GB)
    Free Space:   35704832 B (35.7 MB)
    |
    +-< Physical Volume 5B688642-1804-45DD-9147-F94B029BFCED
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     99999997952 B (100.0 GB)
    |
    +-> Logical Volume Family 6495004B-0FA7-4E33-9F10-5231C7ACF924
        ----------------------------------------------------------
        Encryption Status:       Unlocked
        Encryption Type:         None
        Conversion Status:       NoConversion
        Conversion Direction:    -none-
        Has Encrypted Extents:   No
        Fully Secure:            No
        Passphrase Required:     No
        |
        +-> Logical Volume 1DD574BE-C033-4FCE-9AED-60A26EB58BB4
            ---------------------------------------------------
            Disk:               disk1
            Status:             Online
            Size (Total):       99628744704 B (99.6 GB)
            Size (Converted):   -none-
            Revertible:         Yes (no decryption required)
            LV Name:            Macintosh HD
            Volume Name:        Macintosh HD
            Content Hint:       Apple_HFS

I dare not erase the mac system by myself. It seems a big matter.....
My macbook has broken down for one week, now even worse, I have nearly exhausted
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