After trying to resize bootcamp partition windows will not boot up

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After trying to resize bootcamp partition windows will not boot up

Hi

Yesterday I tried to resize my windows partition so I made so unallocated space as usual and would go into a partition manager and expand my windows partition. Now after i did it and when I try to boot into windows it shows a black screen with white text saying

"No bootable device insert boot disk and press any key"

And when I try to go into disk utility my bootcamp partition is grayed out.(Screenshot here)

When I try to go into first aid and try to repair it, it says "Disk Utility stopped repairing disk0s4.

Disk utility can't repair this disk. Back up as many files as possible, reformat the disk, and restore your backed-up files."

I have tried using many programs such as disk warrior, stellar volume control and more. I have also tried going to multiple forums trying to look for solutions and all have been terminal commands that have not worked. Please help. I need this done ASAP.

Mac mini (Late 2012), OS X Mavericks (10.9.5)

Posted on Oct 5, 2015 9:33 AM

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Answer 1

Loner T

Level 9

59,471 points

Oct 5, 2015 9:39 AM in response to JKlad03

Resizing is not supported by Apple. There is not tool except BC Assistant which understands Hybrid MBRs and GPT and keeps them in sync.

Please post the output of the following OSX Terminal commands.

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

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Answer 2

JKlad03 Author

Level 1

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Oct 5, 2015 4:47 PM in response to Loner T

For the first line diskutil list i got this:

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 379.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 120.0 GB disk0s4

For the second line diskutil cs list I got:

No CoreStorage logical volume groups found

For the third line sudo gpt -vv -r shoe /dev/disk0 I got:

gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

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 976773167

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 740720824 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

741130464 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

742400000 234373120 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 15

976773135 32 Sec GPT table

976773167 1 Sec GPT header

For the 4th line sudo fdisk /dev/disk0 I got:

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 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: AF 1023 254 63 - 1023 254 63 [ 409640 - 740720824] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 741130464 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 742400000 - 234373120] Win95 FAT32L

Im not really sure if the second line is supposed to come out like that but please help

(Also when expanding the windows partition I make unallocated space in Disk Utility and use a windows partition manager to add the unalocated space to the windows partition).

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Answer 3

Loner T

Level 9

59,471 points

Oct 5, 2015 5:08 PM in response to JKlad03

1. Can you post the output of

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

2. The following can cause data loss.

(Also when expanding the windows partition I make unallocated space in Disk Utility and use a windows partition manager to add the unalocated space to the windows partition).

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