Q: Boot Camp disappeared after installing El Capitan

Hi, I have a lot of important files on my windows 8.1 Boot Camp partition and they were not backed up recently. I upgraded from Yosemite to el capitan OS X 10.10 this afternoon and the screen froze on reboot and then booted into windows with an error. After I rebooted it back into OS X it continued with the install however the Boot Camp partition is not visible from the disk utility although you can see it and select it upon pressing on the Option key during startup. If the windows partition is selected a recovery error is shown for windows, even with the usb key inserted.

Macbook Pro mid-2014 1TB SSD Approximately 700G OS X and 300G Windows 8.1

Here are my results from the terminal prompt tests mentioned in earlier threads.

Any help is appreciated, working on figuring out how to run test disk from the command prompt. New to macs.

Thanks!

Posted on Oct 19, 2015 8:55 PM

I have this question too

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Loner T

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OptionJ wrote:

We need to reconstruct this layout using Gdisk.

Posted on Oct 22, 2015 6:30 PM

Q: Boot Camp disappeared after installing El Capitan

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by OptionJ,

OptionJ Oct 21, 2015 3:10 PM in response to Loner T
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Oct 21, 2015 3:10 PM in response to Loner T

Ok, I went to the Microsoft site and created a new usb copy of windows 8.1

http://windows.microsoft.com/en-us/windows-8/create-reset-refresh-media

I then powered on with option pressed and selected the usb copy of windows. it loaded and gave me the screen with the repair option for the first time. This screen never appeared on the other 2 copies of the windows 8.1 usb drive. Not sure what the difference is between the MS site and my OEM DVD but using the link above gives the correct screen.

I went to command prompt and typed in:
Bootrec /FixMbr
It said it completed successfully. I removed the usb and rebooted pressing option. After selecting the actual bootcamp windows directory it gives me an error saying "Remove disks or other media. Press any key to restart. I have no usb or other media attached and after pressing any key it just hangs there.

Any ideas on what to do next?
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by Loner T,

Loner T Oct 21, 2015 3:17 PM in response to OptionJ
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Oct 21, 2015 3:17 PM in response to OptionJ

Can you rebuild the BCD?
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by OptionJ,

OptionJ Oct 21, 2015 3:19 PM in response to Loner T
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Oct 21, 2015 3:19 PM in response to Loner T

Not sure how to do that but after checking disk utility in OS X here is what it shows
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by Loner T,

Loner T Oct 21, 2015 3:27 PM in response to OptionJ
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Oct 21, 2015 3:27 PM in response to OptionJ

Please post the output of the four disk commands.
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by OptionJ,

OptionJ Oct 21, 2015 3:32 PM in response to Loner T
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Oct 21, 2015 3:32 PM in response to Loner T

So after running Bootrec /RebuildBcd

Successfully scanned Windows installations.
Total identified Windows installations: 0
The operation completed successfully.
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by OptionJ,

OptionJ Oct 21, 2015 3:46 PM in response to Loner T
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Oct 21, 2015 3:46 PM in response to Loner T

Lost the CoreStorage logical volume?
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by OptionJ,

OptionJ Oct 21, 2015 4:17 PM in response to Loner T
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Oct 21, 2015 4:17 PM in response to Loner T

So after running Bootrec
GUID_partition_scheme changed to FDisk_partition_scheme
EFI which use to be disk0s1 is missing
Apple_CoreStorage Macintosh HD changed to Apple_HFS Macintosh HD
Apple_Boot Recovery HD stayed the same
Microsoft Basic Data changed to Windows_FAT_32
Windows Recovery which use to be disk0s5 has changed to Windows_NTFS disk0s1

When powering on and pressing the option key without a USB inserted I still have the following
Macintosh HD (boots to OS X)
Windows (Hangs and says remove media, press any key, does nothing)
EFI Boot (boots to OS X)
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by Loner T,

Loner T Oct 21, 2015 5:35 PM in response to OptionJ
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Oct 21, 2015 5:35 PM in response to OptionJ

Your /fixMBR converted the disk to a MBR disk. Do you have GPT Fdisk installed?
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by OptionJ,

OptionJ Oct 21, 2015 8:05 PM in response to Loner T
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Oct 21, 2015 8:05 PM in response to Loner T

Is the issue with MBR recoverable?

I just downloaded and installed GPT Fdisk.

I found a link to Source Forge here:
http://sourceforge.net/projects/gptfdisk/

Installed on Macintosh HD partition
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by OptionJ,

OptionJ Oct 21, 2015 8:35 PM in response to Loner T
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Oct 21, 2015 8:35 PM in response to Loner T

And here are a couple of snapshots of disk0
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by Loner T,

Loner T Oct 22, 2015 5:18 AM in response to OptionJ
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Oct 22, 2015 5:18 AM in response to OptionJ

The primary concern is the CS volume first. You also have a Windows Recovery (GPT5). We may be able to convert the MBR to GPT. Can you use the 'b' command in Gdisk and backup the current GPT?
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by OptionJ,

OptionJ Oct 22, 2015 11:23 AM in response to Loner T
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Oct 22, 2015 11:23 AM in response to Loner T

Ok had to read up on GPT and gdisk. Found a few tutorials but still not that familiar with its commands or structure.

http://www.rodsbooks.com/gdisk/walkthrough.html

https://developer.apple.com/library/mac/technotes/tn2166/_index.html

Here is a screenshot of attempting to save using gdisk for /dev/disk0 using the b command. Not sure if this is correct or not. Or how to check and see if it was actually saved somewhere.
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by OptionJ,

OptionJ Oct 22, 2015 2:52 PM in response to Loner T
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Oct 22, 2015 2:52 PM in response to Loner T

Working on cloning the drive. Is carbon copy cloner a good choice? http://bombich.com/features?_ga=1.61575467.683500517.1445549094

Or is there a better way?
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by Loner T,

Loner T Oct 22, 2015 3:05 PM in response to OptionJ
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Oct 22, 2015 3:05 PM in response to OptionJ

In your local directory, there should be a file called GPT. In Terminal if you type file GPT you will see the information. Here is an example.

sudo gdisk /dev/disk0

GPT fdisk (gdisk) version 1.0.0

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: hybrid

BSD: not present

APM: not present

GPT: present

Found valid GPT with hybrid MBR; using GPT.

Command (? for help): b

Enter backup filename to save: MyGPTBackup

The operation has completed successfully.

Command (? for help): q

file MyGPTBackup

MyGPTBackup: x86 boot sector, Microsoft Windows XP MBR, Serial 0x28a47a7; partition 1: ID=0xee, starthead 0, startsector 1, 409639 sectors; partition 2: ID=0xaf, starthead 127, startsector 409640, 1448624648 sectors; partition 3: ID=0xab, starthead 54, startsector 1449034288, 1269536 sectors; partition 4: ID=0x7, active, starthead 87, startsector 1450305536, 503904256 sectors, code offset 0xc0
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by Loner T,

Loner T Oct 22, 2015 3:05 PM in response to OptionJ
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Oct 22, 2015 3:05 PM in response to OptionJ

If you want to clone Bootcamp, consider Winclone, CampTune or CloneZilla.
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