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elyoe011 Author

Level 1

0 points

Repairing Boot Camp after creating new partition

elyoe011 Nov 24, 2014 5:10 AM Re: Repairing Boot Camp after creating new partition

Re: Repairing Boot Camp after creating new partition in response to Loner T

Loner T,

I did this fix:

sudo fdisk -e /dev/disk0

setpid 4

flag 4

write

When I started Windows all I had was a black screen with a blinking underscore "_"

I went back to my MAC and try it again... but instead of "setpid 4" and "flag 4" I did "setpid 1" and "flag 1"

Now when I boot into Windows/BootCamp is saying "Missing Operating System" and OS X is not bootable.

Also Macintosh HD is gone from Disk Utility when I go into recovery mode and check Disk Utility...

I there any REMEDY for this? I have a lot of data that I need to recover...

ANY help is really appreciated!!!!!!!!

Mac Pro, OS X Yosemite (10.10.1)

Posted on Nov 24, 2014 6:21 AM

48 replies

elyoe011 Author

Level 1

0 points

Nov 30, 2014 8:17 AM in response to Loner T

Loner T,

Sorry I have not been able to get back to you. I was on travel and had no computer...

Here is what I have done so far... I installed Yosemite on an external drive (SD card) and GPT Fdisk on a USB. My mac is now bootable (I guess from the SD card).

How should I proceed now?

Loner T

Level 9

59,513 points

Nov 30, 2014 11:59 AM in response to elyoe011

Can you post the output of

diskutil list

diskutil cs list

when booted from the SD Card?

You can also install GPT Fdisk on the SD Card, you do not need two separate removable media devices. Either is sufficient.

elyoe011 Author

Level 1

0 points

Nov 30, 2014 5:02 PM in response to Loner T

The only bootable option is OS X Yosemite (of my SD card)

I installed GTP Fdisk on the SD card and ran the commands requested, here is the output:

Loner T

Level 9

59,513 points

Nov 30, 2014 5:08 PM in response to elyoe011

Can you post a text version of

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

How did the disk0 become a FDisk_Partition_scheme?

If GPT gives and error try

sudo gdisk /dev/disk0

elyoe011 Author

Level 1

0 points

Nov 30, 2014 5:33 PM in response to Loner T

I'm not sure why disk0 became a FDisk_Partition_scheme. When I installed GPT Fdisk and it asked me where did I wanted to installed it I choose the SD card, that's it!

My mac is extremely slow I guess is because I booted of the SD Card....

Here is the output of all commands:

sudo gpt -vv -r show /dev/disk0

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

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

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

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

gpt show: error: bogus map

gpt show: unable to open device '/dev/disk0': Undefined error: 0

sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 91201/255/63 [1465149168 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: AF 0 0 2 - 1023 254 63 [ 1 - 1269258239] HFS+

*2: 07 1023 254 63 - 1023 254 63 [1269258240 - 195889152] HPFS/QNX/AUX

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 07 0 0 0 - 0 0 0 [ 0 - 0] HPFS/QNX/AUX

sudo gdisk /dev/disk0

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: MBR only

BSD: not present

APM: not present

GPT: present

Found valid MBR and GPT. Which do you want to use?

1 - MBR

2 - GPT

3 - Create blank GPT

Your answer:

Loner T

Level 9

59,513 points

Nov 30, 2014 5:41 PM in response to elyoe011

If you choose '2 - GPT' and 'p' what does it show?

OSX will be slow from SD Card.

elyoe011 Author

Level 1

0 points

Nov 30, 2014 5:47 PM in response to Loner T

Here:

Found valid MBR and GPT. Which do you want to use?

1 - MBR

2 - GPT

3 - Create blank GPT

Your answer: 2

Using GPT and creating fresh protective MBR.

Command (? for help): p

Disk /dev/disk0: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 28422E5D-FA63-422B-82C9-39BED40FCD23

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 193362069 sectors (92.2 GiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 1074628383 512.2 GiB AF00 Customer

3 1074628384 1075897919 619.9 MiB AB00 Recovery HD

4 1269258240 1465147391 93.4 GiB 0700 BOOTCAMP

Command (? for help):

Loner T

Level 9

59,513 points

Nov 30, 2014 6:06 PM in response to elyoe011

Are the sizes correct? If yes, 'w' to write and 'y' to confirm.

elyoe011 Author

Level 1

0 points

Nov 30, 2014 6:20 PM in response to Loner T

Done:

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING

PARTITIONS!!

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

OK; writing new GUID partition table (GPT) to /dev/disk0.

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.

Do I need to reboot or what's next...?

Loner T

Level 9

59,513 points

Nov 30, 2014 6:22 PM in response to elyoe011

Please reboot and test using Alt key and see what options you get.

elyoe011 Author

Level 1

0 points

Nov 30, 2014 6:42 PM in response to elyoe011

Looking better!!!!! 🙂🙂

Anything else to be done? Is BootCamp bootable as well?

elyoe011 Author

Level 1

0 points

Nov 30, 2014 6:52 PM in response to Loner T

OS X is now bootable. Now how can I use the unallocated space (100GB I created before all of this happened) for BootCamp and make it bootable again?

Loner T

Level 9

59,513 points

Nov 30, 2014 7:14 PM in response to elyoe011

The only supported method is to backup your files from current bootcamp, use BCA to remove Windows, and reinstall Windows with a new size and then restore you data files.

There is a commercial tool called Winclone which will let you create a backup. Once you have a backup, use BCA to remove the current Bootcamp, and restore the Winclone image to a larger partition.

elyoe011 Author

Level 1

0 points

Nov 30, 2014 7:48 PM in response to Loner T

At least OX X is operational now and all my data appears to be intact!!! I really appreciate your help on this. 🙂

I will try what you mention above and let you know...

Question... Should I make the above marked space (in the picture that with the RED selection) as "free space" and use it for bootcamp?

Loner T

Level 9

59,513 points

Nov 30, 2014 8:17 PM in response to elyoe011

If you can test Bootcamp as is and it boots and works, unless you really need to space, continue to use Windows. Do not change the partitions via Disk Utility, it will cause you problems again. If you do not need it, till you are ready to reinstall Windows, leave it as is.

Repairing Boot Camp after creating new partition