Bootcamp (Win10) didn't start after el Cap. update

Please take a look at the end. Writing new mbr not possible!

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

NOTE: Write test failed with error number 1. It will be impossible to save

changes to this disk's partition table!

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help):

Command (? for help): ?

b back up GPT data to a file

c change a partition's name

d delete a partition

i show detailed information on a partition

l list known partition types

n add a new partition

o create a new empty GUID partition table (GPT)

p print the partition table

q quit without saving changes

r recovery and transformation options (experts only)

s sort partitions

t change a partition's type code

v verify disk

w write table to disk and exit

x extra functionality (experts only)

? print this menu

Command (? for help): p

Disk /dev/rdisk1: 5860533168 sectors, 2.7 TiB

Logical sector size: 512 bytes

Disk identifier (GUID): C21B970E-970A-4B1F-9041-78DA3AFA505B

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 5860533134

Partitions will be aligned on 8-sector boundaries

Total free space is 1010381 sectors (493.3 MiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 3657263527 1.7 TiB AF05 FusionDrive

3 3657263528 3658533063 619.9 MiB AB00 Recovery HD

4 3659542528 5860532223 1.0 TiB 0700 BOOTCAMP

Command (? for help): R

Recovery/transformation command (? for help): O

Disk size is 5860533168 sectors (2.7 TiB)

MBR disk identifier: 0x028A47A7

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 4294967294 primary 0xEE

Recovery/transformation command (? for help): H

WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

just hit the Enter key at the below prompt and your MBR partition table will

be untouched.

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence: 2 3 4

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): N

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

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB):

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

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07):

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

Warning! GPT partition 4 ends after the 2^32 sector mark! The partition

begins before this point, and is smaller than 2^32 sectors. This is technically

legal, but will confuse some OSes. The partition IS being added to the MBR, but

if your OS misbehaves or can't see the partition, the partition may simply be

unusable in that OS and may need to be resized or omitted from the MBR.

Recovery/transformation command (? for help): O

Disk size is 5860533168 sectors (2.7 TiB)

MBR disk identifier: 0x028A47A7

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 409639 primary 0xEE

2 409640 3657263527 primary 0x03

3 3657263528 3658533063 primary 0xAB

4 * 3659542528 5860532223 primary 0x07

Recovery/transformation 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/rdisk1.

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Unable to open device '/dev/rdisk1' for writing! Errno is 1! Aborting write!

Recovery/transformation command (? for help):

Is this because I am already MacOs running?

So I do the same steps from CMD+R Console after reboot?

Markuss-iMac:~ markusplecher$ Sudo /usr/local/bin/gdisk /dev/rdisk1

Password:

GPT fdisk (gdisk) version 1.0.0

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): P

Disk /dev/rdisk1: 5860533168 sectors, 2.7 TiB

Logical sector size: 512 bytes

Disk identifier (GUID): C21B970E-970A-4B1F-9041-78DA3AFA505B

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 5860533134

Partitions will be aligned on 8-sector boundaries

Total free space is 1010381 sectors (493.3 MiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 3657263527 1.7 TiB AF05 FusionDrive

3 3657263528 3658533063 619.9 MiB AB00 Recovery HD

4 3659542528 5860532223 1.0 TiB 0700 BOOTCAMP

Command (? for help): R

Recovery/transformation command (? for help): O

Disk size is 5860533168 sectors (2.7 TiB)

MBR disk identifier: 0x028A47A7

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 4294967294 primary 0xEE

Recovery/transformation command (? for help): H

WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

just hit the Enter key at the below prompt and your MBR partition table will

be untouched.

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence: 2 3 4

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):

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

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB):

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

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07):

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

Warning! GPT partition 4 ends after the 2^32 sector mark! The partition

begins before this point, and is smaller than 2^32 sectors. This is technically

legal, but will confuse some OSes. The partition IS being added to the MBR, but

if your OS misbehaves or can't see the partition, the partition may simply be

unusable in that OS and may need to be resized or omitted from the MBR.

Recovery/transformation command (? for help): O

Disk size is 5860533168 sectors (2.7 TiB)

MBR disk identifier: 0x028A47A7

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 409639 primary 0xEE

2 409640 3657263527 primary 0xAF

3 3657263528 3658533063 primary 0xAB

4 * 3659542528 5860532223 primary 0x07

Recovery/transformation 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/rdisk1.

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.

Now, I am excited :-) Reboot!

Markuss-iMac:~ markusplecher$ Sudo /usr/local/bin/gdisk /dev/rdisk1

Password:

GPT fdisk (gdisk) version 1.0.0

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): P

Disk /dev/rdisk1: 5860533168 sectors, 2.7 TiB

Logical sector size: 512 bytes

Disk identifier (GUID): C21B970E-970A-4B1F-9041-78DA3AFA505B

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 5860533134

Partitions will be aligned on 8-sector boundaries

Total free space is 1010381 sectors (493.3 MiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 3657263527 1.7 TiB AF05 FusionDrive

3 3657263528 3658533063 619.9 MiB AB00 Recovery HD

4 3659542528 5860532223 1.0 TiB 0700 BOOTCAMP

Command (? for help): R

Recovery/transformation command (? for help): O

Disk size is 5860533168 sectors (2.7 TiB)

MBR disk identifier: 0x028A47A7

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 4294967294 primary 0xEE

Recovery/transformation command (? for help): H

WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

just hit the Enter key at the below prompt and your MBR partition table will

be untouched.

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence: 2 3 4

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):

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

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB):

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

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07):

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

Warning! GPT partition 4 ends after the 2^32 sector mark! The partition

begins before this point, and is smaller than 2^32 sectors. This is technically

legal, but will confuse some OSes. The partition IS being added to the MBR, but

if your OS misbehaves or can't see the partition, the partition may simply be

unusable in that OS and may need to be resized or omitted from the MBR.

Recovery/transformation command (? for help): O

Disk size is 5860533168 sectors (2.7 TiB)

MBR disk identifier: 0x028A47A7

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 409639 primary 0xEE

2 409640 3657263527 primary 0xAF

3 3657263528 3658533063 primary 0xAB

4 * 3659542528 5860532223 primary 0x07

Recovery/transformation 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/rdisk1.

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.

Now, I am excited :-) Reboot!

and what could I say to you?

THANK YOU LONER !!!🙂😁

You are my hero ... again!!!

Windows 10 working fine loke before. All I have to do is to restore my timemachine backup for the mac partition to get my data back. Can you tell me if this could cause problems with el capitan because timemachine is made from yosemite?

I am so happy that you helped me out Loner! Thank you very very much!!!

When there is something I can do for you let me know!

kindest regards

Markus