Bootcamp partition disappeared..

Question

yk052052 Author

Level 1

0 points

Bootcamp partition disappeared..

Previously I've had three partitions. MAC OSX + BOOT CAMP + Shared Partition(FAT32)

For upgrade to EL CAPITAN, I used bootable USB. Using disk utility I erased MAC OSX for clean installation and proceeded installation.

But I got an error massage saying "OS X could not be installed on your computer. This partition map modification would make a windows partition unbootable".

Untill this moment, I could see bootcamp in boot mode selection when I tried . For solve the problem above, I tried to resize MAC OSX partition. (MAC OSX partition was 250GB and resized it to 249GB) and I found 1 more partition created with 1GB. I reuninified them as original size 250GB.

I tried to reboot the MAC and since I couldn't find any bootable disk except USB disk and I'm getting same error massage when I tried to install OSX.

Where do I have to start and what do I have to do.

Please give me any say

MacBook Pro (Retina, 15-inch, Mid 2014), Mac OS X (10.7)

Posted on Oct 7, 2015 7:22 AM

Reply

Answer 1

Loner T

Level 9

59,471 points

Oct 7, 2015 8:51 AM in response to yk052052

yk052052 wrote:

Previously I've had three partitions. MAC OSX + BOOT CAMP + Shared Partition(FAT32)

Apple OSes do nto understand such layouts and are recipe for data loss waiting to happen.

For upgrade to EL CAPITAN, I used bootable USB. Using disk utility I erased MAC OSX for clean installation and proceeded installation.

But I got an error massage saying "OS X could not be installed on your computer. This partition map modification would make a windows partition unbootable".

You should have stopped here. 😮

Untill this moment, I could see bootcamp in boot mode selection when I tried . For solve the problem above, I tried to resize MAC OSX partition. (MAC OSX partition was 250GB and resized it to 249GB) and I found 1 more partition created with 1GB. I reuninified them as original size 250GB.

I tried to reboot the MAC and since I couldn't find any bootable disk except USB disk and I'm getting same error massage when I tried to install OSX.

All these steps should not have been done at all. More than likely you will lose Windows 10.

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.

Reply

Answer 2

yk052052 Author

Level 1

0 points

Oct 7, 2015 7:46 PM in response to Loner T

I got out as following.

1.diskutil list

2. diskutil cs list

No CoreStorage logical volume groups found

3. sudo gpt -vv -r show /dev/disk0

Command not found

4. sudo fdisk /dev/disk0

Command not found

I used terminal during the installation from bootable USB. For the commands 3 & 4, I typed correctly, do I have to use different terminal mode?

If possible, I really want all disk recovered as original. But if it's impossible, I just want to copy whole shared partition and some folders in window background.

Reply

Answer 3

Loner T

Level 9

59,471 points

Oct 8, 2015 4:17 AM in response to yk052052

Since you are in Recovery console, you are already root. Remove the "sudo" from 3 and 4. Is your OS X bootable?

Reply

Answer 4

yk052052 Author

Level 1

0 points

Oct 8, 2015 6:01 AM in response to Loner T

Ah. I got the output like below. I hope I can find the way. Thanks.

Reply

Answer 5

yk052052 Author

Level 1

0 points

Oct 8, 2015 6:29 AM in response to yk052052

And any disks are not bootable except USB Disk.

Reply

Answer 6

Loner T

Level 9

59,471 points

Oct 8, 2015 6:30 AM in response to yk052052

Your Recovery HD seems to have been replaced with the Shared partition.

Can you boot into OS X?

Reply

Answer 7

yk052052 Author

Level 1

0 points

Oct 8, 2015 8:09 AM in response to Loner T

Yes, I removed Recovery HD and replaced with Shared partition at first and have had used this.

And I can't boot into OS X.

Reply

Answer 8

Loner T

Level 9

59,471 points

Oct 8, 2015 8:26 AM in response to yk052052

Can you post the output of

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

Do you get an error message when you try to boot into OSX?

Reply

Answer 9

yk052052 Author

Level 1

0 points

Oct 8, 2015 8:53 AM in response to Loner T

output keeps saying

"command not found"

I typed it several times and checked if there's typo, but it doesn't seem to be wrong.

Also as you can see in the picture below, there's only one option for boot (USB installation disk)

Reply

Answer 10

Loner T

Level 9

59,471 points

Oct 8, 2015 8:59 AM in response to yk052052

Can you use How to install OS X on an external drive connected to your Mac - Apple Support and install OSX on an external disk, before we make any changes to the internal disks?

Reply

Answer 11

yk052052 Author

Level 1

0 points

Oct 8, 2015 10:00 AM in response to Loner T

I just installed OSX in another USB. So what do I do now?

Reply

Answer 12

Loner T

Level 9

59,471 points

Oct 8, 2015 10:52 AM in response to yk052052

Connect this USB and power down your Mac, power it back up and hold the Alt/Option Key. Select the USB OSX installation.

Reply

Answer 13

yk052052 Author

Level 1

0 points

Oct 8, 2015 10:10 PM in response to Loner T

I installed OSX on another USB and booted with it. So I could make all my information backed up. I appreciate it so much.

Now I can anything to revive my Bootcamp and OSX.

Can you explain what to do from now?

Reply

Answer 14

yk052052 Author

Level 1

0 points

Oct 8, 2015 10:17 PM in response to yk052052

I just realized that shared partition didn't show up and I can't back up for that.

I had this same problem that shared partition doesn't show up. And every time this happened, I did 'chkdsk /f " command in windows and used to recover the shared disk. But for now, I cannot boot windows. Is there any command in OSX doing same thing as "chkdsk /f" ?

Or if I'm able to copy whole shared disk to another disk by using any command in OSX, it would be ok as well.

Reply

Answer 15

Loner T

Level 9

59,471 points

Oct 9, 2015 10:16 AM in response to yk052052

yk052052 wrote:

I just realized that shared partition didn't show up and I can't back up for that.

I had this same problem that shared partition doesn't show up. And every time this happened, I did 'chkdsk /f " command in windows and used to recover the shared disk. But for now, I cannot boot windows. Is there any command in OSX doing same thing as "chkdsk /f" ?

Or if I'm able to copy whole shared disk to another disk by using any command in OSX, it would be ok as well.

Is your shared partition NTFS?

Reply