Level 1

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Bootcamp Partition No Longer Mounted

I have a very similar problem to what was discussed in this forum: Boot Camp Partition not mounting. I had Sierra, and Bootcamp was working fine. While I had Sierra, I used a tool called MiniTool Partition Wizard to resize my bootcamp disk without deleting Windows, and that worked fine. However, I just upgraded to High Sierra, and now my Bootcamp disk is not mounted, and it has been renamed to "disk0s3" as shown in the figure below. I tried to follow the steps in the post I mentioned earlier, but I think my problem is different enough such that those steps don't quite do it. Any suggestions? Thank you.

MacBook Pro, macOS High Sierra (10.13.4)

Posted on Apr 28, 2018 2:47 PM

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91 replies

Loner T

Level 9

59,536 points

Apr 30, 2018 9:14 PM in response to howie8594

After the TM Restore, we need to fix the Windows side. 😉

howie8594 Author

Level 1

9 points

May 1, 2018 1:23 AM in response to howie8594

The restore is done, and everything’s working normally.

howie8594 Author

Level 1

9 points

May 1, 2018 8:43 PM in response to Loner T

That didn't work either, although I may have missed something you said.

howie8594 Author

Level 1

9 points

May 1, 2018 8:44 PM in response to howie8594

It seems I didn't get a chance for step 10.

Loner T

Level 9

59,536 points

May 2, 2018 4:16 AM in response to howie8594

howie8594 wrote:

It seems I didn't get a chance for step 10.

... of the Rebuild MBR section? 😕

howie8594 Author

Level 1

9 points

May 2, 2018 10:01 AM in response to Loner T

Yeah sorry, step 10 of the rebuild MBR section. I didn’t get to answer anything for (part 4 boot flag make NTFS bootable partition).

howie8594 Author

Level 1

9 points

May 2, 2018 10:43 AM in response to Loner T

Yes it is an option. Should I try making it the default?

howie8594 Author

Level 1

9 points

May 2, 2018 3:59 PM in response to Loner T

Sorry, I don't understand. Is there a website I need to download "Startup Repair" from?

Loner T

Level 9

59,536 points

Apr 29, 2018 5:43 AM in response to howie8594

howie8594 wrote:

After looking through a few threads, I think I figured out what you were saying. First, I opened Testdisk and selected the default option. Then this screen came up.

You will need to use the 'Sudo' otherwise the search does not work correctly, because you can only see the 625MB disk.

Loner T

Level 9

59,536 points

Apr 29, 2018 5:44 AM in response to MistaSkoTie

MistaSkoTie wrote:

I would be willing to bet that MPT has deleted the boot partition from windows keeping it from mounting (therefore booting). This would require a removal of Boot Camp and start from scratch. Curious to see what you find.

MPT updates only the Hybrid MBR, without synchronizing it with the GPT, which cause issues after the next boot.

Loner T

Level 9

59,536 points

Apr 30, 2018 4:16 AM in response to howie8594

In the linked example, GPT4 is being deleted and recreated. If you use the Delete (d) command for 2 and then recreate is as

Step 7 - ( - Start offset in sectors or the start point for macOS part) - 409640
Step 8 - ( - End offset) - 714960895

In Step 8, do not use the '+' sign. This would allow GPT2 and GPT3 to have non-overlapping entries. You should test macOS booting, before you test Windows.

Loner T

Level 9

59,536 points

Apr 30, 2018 5:37 PM in response to howie8594

Let us try again...

diskutil unmountDisk disk0

gpt remove -i 2 /dev/disk0

gpt remove -i 3 /dev/disk0

diskutil unmountDisk disk0

gpt add -i 3 -b 714960896 -s 222740473 -t windows /dev/disk0

gpt -vv -r show /dev/disk0

howie8594 Author

Level 1

9 points

Apr 30, 2018 5:46 PM in response to Loner T

Looks like a similar error unfortunately.

-bash-3.2# diskutil unmountDisk disk0

Unmount of all volumes on disk0 was successful

-bash-3.2# gpt remove -i 2 /dev/disk0

gpt remove: /dev/disk0: Suspicious MBR at sector 0

-bash-3.2# gpt remove -i 3 /dev/disk0

gpt remove: /dev/disk0: Suspicious MBR at sector 0

-bash-3.2# diskutil unmountDisk disk0

Unmount of all volumes on disk0 was successful

-bash-3.2# gpt add -i 3 -b 714960896 -s 222740473 -t windows /dev/disk0

gpt add: /dev/disk0: Suspicious MBR at sector 0

gpt add: /dev/disk0: error: no space available on device

-bash-3.2# gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=480103981056; sectorsize=512; blocks=937703088

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 937703087

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 800575448 2 MBR part 255

800985088 136716288 3 MBR part 12

937701376 1679

937703055 32 Sec GPT table

937703087 1 Sec GPT header

howie8594 Author

Level 1

9 points

Apr 30, 2018 6:32 PM in response to Loner T

Looks like that worked.

-bash-3.2# diskutil unmountDisk disk0

Unmount of all volumes on disk0 was successful

-bash-3.2# gpt add -i 2 -b 409640 -s 714551256 -t apfs /dev/disk0

/dev/disk0s2 added

-bash-3.2# gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=480103981056; sectorsize=512; blocks=937703088

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

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

gpt show: /dev/disk0: Sec GPT at sector 937703087

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 714551256 2 GPT part - 7C3457EF-0000-11AA-AA11-00306543ECAC

714960896 222740473 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

937701369 1686

937703055 32 Sec GPT table

937703087 1 Sec GPT header

Loner T

Level 9

59,536 points

Apr 30, 2018 8:47 PM in response to howie8594

Try

diskutil eraseVolume jhfs+ BLANK disk0s2

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Bootcamp Partition No Longer Mounted