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hornbymanzpc Author

Level 1

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OSX bootcamp not showing on Option key boot up

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 420.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 60.0 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *419.9 GB disk1

Logical Volume on disk0s2

6915A221-C321-47AD-83EF-79E02DF42F5A

Unlocked Encrypted

Zacharys-Macbook-Pro:~ Zachary$ diskutil cs list

CoreStorage logical volume groups (1 found)

+-- Logical Volume Group A28D87B8-FB2F-4E5A-9873-B4D7C3EB37E3

=========================================================

Name: Macintosh HD

Status: Online

Size: 420230041600 B (420.2 GB)

Free Space: 18976768 B (19.0 MB)

+-< Physical Volume 17BC8AC6-8DED-4215-994B-0000742E20D3

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 420230041600 B (420.2 GB)

+-> Logical Volume Family BE71DED9-2FF9-4466-AEA4-68583F077C74

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

Encryption Status: Unlocked

Encryption Type: AES-XTS

Conversion Status: Complete

Conversion Direction: -none-

Has Encrypted Extents: Yes

Fully Secure: Yes

Passphrase Required: Yes

+-> Logical Volume 6915A221-C321-47AD-83EF-79E02DF42F5A

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

Disk: disk1

Status: Online

Size (Total): 419858743296 B (419.9 GB)

Conversion Progress: -none-

Revertible: Yes (unlock and decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

Zacharys-Macbook-Pro:~ Zachary$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

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 977105059

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 820761800 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

821171440 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

822440976 37477360

859918336 117186560 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

977104896 131

977105027 32 Sec GPT table

977105059 1 Sec GPT header

Zacharys-Macbook-Pro:~ Zachary$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>

2: AC 1023 254 63 - 1023 254 63 [ 409640 - 820761800] <Unknown ID>

3: AB 1023 254 63 - 1023 254 63 [ 821171440 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 859918336 - 117186560] Win95 FAT32L

MacBook Pro with Retina display, OS X Mountain Lion (10.8.4)

Posted on Mar 20, 2015 7:03 PM

Best reply

Loner T

Level 9

59,471 points

Posted on Mar 20, 2015 7:13 PM

Please download Testdisk (http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step) and GPT Fdisk (http://sourceforge.net/projects/gptfdisk/). Run Testdisk and use the UI flow https://imgur.com/a/PjmnK to look for missing NTFS header in the following gap.

822440976 37477360

View in context

34 replies

hornbymanzpc Author

Level 1

0 points

Mar 21, 2015 8:13 PM in response to Loner T

this is what ive done before, this took about 12 hours, it just finished

Loner T

Level 9

59,471 points

Mar 21, 2015 8:44 PM in response to hornbymanzpc

It looks like you are re-executing the Deeper Search again. You may have to let this search finish. When you see the screen with partitions listed and see an option for 'P - List Files', then choose the one highlighted below.

luck3y

Level 1

0 points

Mar 22, 2015 1:26 AM in response to Loner T

Im having this problem and I really need help. I believe you can help me Loner T. Thank you!

Since bootcamp was not staring I found the solution you posted:

· sudo fdisk -e /dev/disk0

setpid 4

flag 4

write

After this windows is just getting stuck at boot (black screen with blinking cursor)

Loner T

Level 9

59,471 points

Mar 22, 2015 6:18 AM in response to luck3y

Can you start a new thread to avoid confusing two separate issues?

luck3y

Level 1

0 points

Mar 22, 2015 9:47 AM in response to Loner T

Of course.

Black Cursor Blinking when starting windows Bootcamp

hornbymanzpc Author

Level 1

0 points

Mar 27, 2015 8:53 AM in response to Loner T

Okay, Ive re-done the search and I dont want to mess up again, what do I do next?:

Loner T

Level 9

59,471 points

Mar 27, 2015 9:39 AM in response to hornbymanzpc

This is a list of partitions which cannot be recovered. Press Enter to Continue and you should get a list o partitions you can work with.

hornbymanzpc Author

Level 1

0 points

Mar 27, 2015 11:36 AM in response to Loner T

What next?

Loner T

Level 9

59,471 points

Mar 27, 2015 12:00 PM in response to hornbymanzpc

Do not use left/right arrow keys. Use only up/down arrow keys and use 'P - List Files'.

Please use P to list files look at the fourth and fifth entries which say MS Data. The fourth entry looks the most likely candidate.

hornbymanzpc Author

Level 1

0 points

Mar 27, 2015 12:02 PM in response to Loner T

Loner T

Level 9

59,471 points

Mar 27, 2015 1:24 PM in response to hornbymanzpc

Here is table that I use for validation. Please read the two Gdisk command sequences. If you have any questions, please ask, before you proceed.

GPT 3 Start	GPT 3 Size	GPT 3 End	NTFS Start	Sector Offset	NTFS Size	NTFS End
821171440	1269536	822440976	822441984	1008	154662905	977104889

Leave your Testdisk display and start a new Terminal Window. Please 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)
822441984 - Start offset in bytes (start point for Bootcamp part)
+154662905 - (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). The only values that need modifications are the Boot flags and step 6. Accept all other defaults that Gdisk offers.

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

Here is an example Q&A session with Gdisk.

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): 07

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