Can't find Bootcamp partition after installing Yosemite

So here is my new thread regarding to a question I asked to user Loner T: I've been reading some of your posts about the bootcamp problem after upgrading to Yosemite, but I couldn't figure my problem cause it wasn't the same as the one I was reading. This is what my Disk Utility shows after I followed your instructions, could you please help me? Thanks!

gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

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 1465149167

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 1065599160 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1066008800 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1067278336 397869056 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1465147392 1743

1465149135 32 Sec GPT table

1465149167 1 Sec GPT header

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$

MacBook Pro, OS X Yosemite (10.10.1)

Posted on Dec 21, 2014 9:45 PM

49 replies

Jan 3, 2015 10:36 PM in response to Loner T

I found it! Now what?

Loner T

Level 9

59,536 points

Jan 3, 2015 11:18 PM in response to marielordorica

The triplet you have is a start/end/size triplet. You need to fill it where Start and Size are specified below. If you see any error messages, please stop and post back.

You need to use the following steps. 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.

Rebuild GPT4 using start/end offsets

Sudo gdisk /dev/rdisk0

P (print the full list of parts)

D (delete)

4 (part 4)

N (new part)

4 (part 4)

Start offset in bytes (start point for Bootcamp part)

+Size (Size offset as opposed to End offset)

0700 (Windows part type)

P (print list of all parts just to see what changes will be made)

W (Write the new GPT)

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).

Sudo gdisk /dev/disk0

P (Print list of parts)

R (Recover)

H (chooses Hybrid)

Partitions numbers to be hybridized: 2 3 4

Y (Good for GRUB question)

N (part 2 boot flag)

N (part 3 boot flag)

Y (part 4 boot flag make NTFS bootable partition)

W (Write the new MBR)

Y (Yes! write the new MBR)

Reboot

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 see a hanging underline cursor at the top left on a black screen, and it does not proceed further, you may need Windows Startup Repair or a tool called EasyBCD.

Jan 3, 2015 11:30 PM in response to Loner T

So after I found the System Volume Information, what's the next key i should press to start this new process you've told me? Do I quit, copy or hide? Or do I just ignore and start from zero with these commands you've written?

Loner T

Level 9

59,536 points

Jan 4, 2015 9:16 AM in response to marielordorica

Leave the Testdisk window as is. Start a new terminal window for Gdisk commands.

Jan 4, 2015 11:54 AM in response to Loner T

Should I open a new window from Terminal "with same command" or "with Settings - Basic", because I opened it with the second option and entered "Sudo gdisk /dev/rdisk0" and the command is not found.

Last login: Sun Jan 4 13:47:59 on ttys000

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ Sudo gdisk /dev/rdisk0

Password:

Sudo: gdisk: command not found

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$

Loner T

Level 9

59,536 points

Jan 4, 2015 7:15 PM in response to marielordorica

Did you install Gdisk? From Terminal try

what gdisk

Jan 4, 2015 7:40 PM in response to Loner T

How do I install Gdisk? I'm sorry to be such a pain, I'm trying my best, thank you for your patience!

Loner T

Level 9

59,536 points

Jan 4, 2015 8:59 PM in response to marielordorica

Search for GPT Fdisk on sourceforge.net. Download it and install it.

http://sourceforge.net/projects/gptfdisk/

Jan 4, 2015 10:07 PM in response to Loner T

Thanks. Ok, so I entered the steps you listed above, but when I typed "4" for the second time, this appeared, am I on the right track? Where do I type "

Start offset in bytes (start point for Bootcamp part)

+Size (Size offset as opposed to End offset)" I didn't get that. Thank you!

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ Sudo gdisk /dev/rdisk0

Password:

GPT fdisk (gdisk) version 0.8.10

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): p

Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00001E09-3131-0000-3E6A-0000FC0E0000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1465149134

Partitions will be aligned on 8-sector boundaries

Total free space is 1749 sectors (874.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 1066008799 508.1 GiB AF05 Macintosh HD

3 1066008800 1067278335 619.9 MiB AB00 Recovery HD

4 1067278336 1465147391 189.7 GiB 0700 Untitled

Command (? for help): d

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): 4

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): n

Partition number (5-128, default 5): 4

Value out of range

Partition number (5-128, default 5):

Loner T

Level 9

59,536 points

Jan 4, 2015 11:16 PM in response to marielordorica

Your 'd' command did not work. It does not look correct.

Jan 6, 2015 9:57 PM in response to Loner T

I don't understand the start and size part i think i didn't do it correctly.

Last login: Sun Jan 4 13:51:48 on ttys002

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ gdisk

GPT fdisk (gdisk) version 0.8.10

Type device filename, or press <Enter> to exit:

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ what gdisk

gdisk: No such file or directory

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ Sudo gdisk /dev/rdisk0

Password:

GPT fdisk (gdisk) version 0.8.10

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): p

Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00001E09-3131-0000-3E6A-0000FC0E0000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1465149134

Partitions will be aligned on 8-sector boundaries

Total free space is 1749 sectors (874.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 1066008799 508.1 GiB AF05 Macintosh HD

3 1066008800 1067278335 619.9 MiB AB00 Recovery HD

4 1067278336 1465147391 189.7 GiB 0700 Untitled

Command (? for help): d

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): 4

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): n

Partition number (5-128, default 5): 4

Value out of range

Partition number (5-128, default 5):

[Restored]

Last login: Tue Jan 6 23:41:46 on console

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ Sudo gdisk /dev/rdisk0

Password:

GPT fdisk (gdisk) version 0.8.10

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): p

Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00001E09-3131-0000-3E6A-0000FC0E0000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1465149134

Partitions will be aligned on 8-sector boundaries

Total free space is 1749 sectors (874.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 1066008799 508.1 GiB AF05 Macintosh HD

3 1066008800 1067278335 619.9 MiB AB00 Recovery HD

4 1067278336 1465147391 189.7 GiB 0700 Untitled

Command (? for help): d

Partition number (1-4): 4

Command (? for help): n

Partition number (4-128, default 4): 4

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: start

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: +size

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: 0700

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: p

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}:

Loner T

Level 9

59,536 points

Jan 7, 2015 9:13 PM in response to marielordorica

marielordorica wrote:

I don't understand the start and size part i think i didn't do it correctly.

Last login: Sun Jan 4 13:51:48 on ttys002

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ gdisk

GPT fdisk (gdisk) version 0.8.10

Type device filename, or press <Enter> to exit:

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ what gdisk

gdisk: No such file or directory

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ Sudo gdisk /dev/rdisk0

Password:

GPT fdisk (gdisk) version 0.8.10

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): p

Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00001E09-3131-0000-3E6A-0000FC0E0000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1465149134

Partitions will be aligned on 8-sector boundaries

Total free space is 1749 sectors (874.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 1066008799 508.1 GiB AF05 Macintosh HD

3 1066008800 1067278335 619.9 MiB AB00 Recovery HD

4 1067278336 1465147391 189.7 GiB 0700 Untitled

Command (? for help): d

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): 4

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): n

Partition number (5-128, default 5): 4

Value out of range

Partition number (5-128, default 5):

[Restored]

Last login: Tue Jan 6 23:41:46 on console

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$ Sudo gdisk /dev/rdisk0

Password:

GPT fdisk (gdisk) version 0.8.10

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): p

Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00001E09-3131-0000-3E6A-0000FC0E0000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1465149134

Partitions will be aligned on 8-sector boundaries

Total free space is 1749 sectors (874.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 1066008799 508.1 GiB AF05 Macintosh HD

3 1066008800 1067278335 619.9 MiB AB00 Recovery HD

4 1067278336 1465147391 189.7 GiB 0700 Untitled

Command (? for help): d

Partition number (1-4): 4

Command (? for help): n

Partition number (4-128, default 4): 4

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: start

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: +size

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: 0700

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: p

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}:

It should be

Rebuild GPT4 using start/end offsets

Sudo gdisk /dev/rdisk0

P (print the full list of parts)

D (delete)

4 (part 4)

N (new part)

4 (part 4)

1067220992 (start point for Bootcamp part)

+397924352 (Size offset as opposed to End offset)

0700 (Windows part type)

P (print list of all parts just to see what changes will be made)

W (Write the new GPT)

Y (Yes! really write the new GPT)

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

Jan 8, 2015 10:28 AM in response to Loner T

I typed the numbers you told me but I don't know if the system is accepting them, is this right? I don't know if i should proceed.

Command (? for help): d

Partition number (1-4): 4

Command (? for help): n

Partition number (4-128, default 4): 4

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}: 1067220992

First sector (34-1465149134, default = 1067278336) or {+-}size{KMGTP}:

Last sector (1067278336-1465149134, default = 1465149134) or {+-}size{KMGTP}: +397924352

Last sector (1067278336-1465149134, default = 1465149134) or {+-}size{KMGTP}:

Current type is 'Apple HFS/HFS+'

Hex code or GUID (L to show codes, Enter = AF00):

Loner T

Level 9

59,536 points

Jan 8, 2015 11:00 AM in response to marielordorica

Your NTFS partition is partially sitting in your Mac Recovery HD. Notice the negative sector offset in the following table.

GPT 3 Start	GPT 3 Size	GPT 3 End	NTFS Start	Sector Offset	NTFS Size	NTFS End
1066008800	1269536	1067278336	1067220992	-57344	397924352	1465145344

This means Gdisk will not let you use the start number you found because it will create an overlapping partition with GPT 3 (Recovery HD).

You will need also need to delete GPT 3 (d,3), the same way you have deleted GPT 4 (d, 4), first, before you can use this to rebuild the Hybrid MBR. Your Hybrid MBR will only have two entries GPT 2 and GPT 3.

To get Recovery HD back, you will need to re-install OSX after you recover your Windows installation. I suggest you make a backup of your Windows and OSX installation after the disk steps.

The new steps will be

Rebuild GPT 3 and 4 using start/end offsets

Sudo gdisk /dev/rdisk0

P (print the full list of parts)

D (delete)

4 (part 4)

D (delete)

3 (part 3 - Recovery HD)

N (new part)

3 (part 3 - there is no Recovery HD anymore)

1067220992 (start point for Bootcamp part)

+397924352 (Size offset as opposed to End offset)

0700 (Windows part type)

P (print list of all parts just to see what changes will be made)

W (Write the new GPT)

Y (Yes! really write the new GPT)

This will delete and re-write the GPT partition info for /dev/disk0s3.

Jan 8, 2015 11:08 AM in response to Loner T

Ok, I did it! 🙂 What's the next step?

Do you want to proceed? (Y/N): y

OK; writing new GUID partition table (GPT) to /dev/rdisk0.

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Warning: The kernel may continue to use old or deleted partitions.

You should reboot or remove the drive.

The operation has completed successfully.

MacBook-Pro-de-Mariel-Ordorica:~ marielordorica$

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Can't find Bootcamp partition after installing Yosemite