BootCamp Broke after resizing partition windows and upgrade yosemite

Can you post the output of

sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

Hello Loner, I to have this problem. If you can help me in anyway, I won't know how to thank you.

If it helps, I've posted the outputs of the commands shown above, as well as the one you suggested.

Adams-MacBook-Pro:~ Adam$ sudo fdisk /dev/disk0

Password:

Disk: /dev/disk0 geometry: 30515/255/63 [490234752 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 2 - 25 127 14 [ 1 - 409639] <Unknown ID>

2: 03 25 127 15 - 1023 254 63 [ 409640 - 255104784] XENIX /usr

*3: 03 1023 254 63 - 1023 254 63 [ 255514424 - 1269536] XENIX /usr

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

Adams-MacBook-Pro:~ Adam$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 130.6 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 70.0 GB disk0s4

Adams-MacBook-Pro:~ Adam$ sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=251000193024; sectorsize=512; blocks=490234752

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 490234751

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 255104784 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

255514424 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

256783960 96733608

353517568 136716288 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

490233856 863

490234719 32 Sec GPT table

490234751 1 Sec GPT header

Adams-MacBook-Pro:~ Adam$

Output of the command you suggested:

Adams-MacBook-Pro:~ Adam$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

*

00000200

Thanks in advance.

Can you start a new discussion and post these outputs on the new thread? It avoids confusing the OP. Thanks.

Can you use Lost my Windows 7 Boot Camp partition after upgrading to Yosemite. Help! as a reference and download Testdisk and GPT Fdisk and start a Testdisk scan?

You have a issue different from others. Was resizing done before the Yosemite upgrade or after?

You do not need to write anything to the disk. Press Enter to Continue. Testdisk is used only to scan for partitions, no changes are made using Testdisk. GPT Fdisk is used to rebuild partition information, based on the information from Testdisk.

I cannot see the RTF file at the link you have.

Here is table based on your attachment file.

Leave your Testdisk display and start a new Terminal Window. You need to use the following steps. You will need to install GPT Fdisk (aka Gdisk).

If you see any error messages during the following steps, please stop and post back here with the error message. The following steps have values from your Testdisk output (and you can verify) in Steps 7 and 8. Notice the '+' in step 8.

Rebuild GPT4 using start/end offsets

1. Sudo gdisk /dev/rdisk0
2. P (print the full list of parts)
3. D (delete)
4. 4 (part 4)
5. N (new part)
6. 4 (part 4)
7. 1566320640 - Start offset in bytes (start point for Bootcamp part)
8. +387203065 - Size offset (as opposed to End offset)
9. 0700 (Windows part type)
10. P (print list of all parts just to see what changes will be made)
11. W (Write the new GPT)
12. Y (Yes! really write the new GPT)

This will delete and re-write the GPT partition info for /dev/disk0s4.

Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR. Use defaults for other questions (like partition codes). The only values that need modifications are the Boot flags and step 10. Accept all other defaults that Gdisk offers.

1. Sudo gdisk /dev/disk0
2. P (Print list of parts)
3. R (Recover)
4. O (print current Hybrid MBR)
5. H (chooses Hybrid)
6. Partitions numbers to be hybridized: 2 3 4
7. Y (Good for GRUB question)
8. N (part 2 boot flag)
9. N (part 3 boot flag)
10. Y (part 4 boot flag make NTFS bootable partition)
11. O (print current Hybrid MBR)
12. W (Write the new MBR)
13. Y (Yes! write the new MBR)
14. Reboot

Here is sample Q&A for this section. Please notice the Press Enter/Return.

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

Creating entry for GPT partition #2 (MBR partition #2)

Enter an MBR hex code (default AF): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07): Press Enter/Return

Set the bootable flag? (Y/N): Y

Test 1 - Does Bootcamp Volume show up in Finder?

Test 2 - Can you see files in Bootcamp Volume?

Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?

Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.

If you are failing in Test 4, you have two options.

1. Use Bootcamp Assistant and choose the first two options Create USB Installer... and Download Software... . Please ensure you do not click onRemove Windows option. Once you have the USB created, you can

a. Insert the USB

b. Select Bootcamp in System Preferences -> Startup Disk . Do not select your USB, select your primary Windows installation.

c. Click on Restart.

d. You should see screens as shown here - http://imgur.com/a/1DaOE#0

e. Click on Repair at bottom left of the Windows after you select Language, Region, etc.

2. Use Windows Startup Repair from your original DVD (or burn the ISO to a DVD) and Repair.