My Windows partition is not bootable after create a new partition

Question

My Windows partition is not bootable after create a new partition

Hi all.

I'm using a Mac Air with El Captain 10.11.1

My bootcamp with Windows 10 was running ok, today i've created a new partition to extend windows partition.

It was made in Mac disk utiity.

After that windows is not bootable anymore.

Windows partition mount and work on Mac OS.

I have 3 partitions: Macintosh HD - Untitled - Windows.

Here are the output for some commands: (notice that windows partition is listed like disk 5)

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

MacBook-Air-de-Ricardo:~ Barbieri$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 38.1 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_HFS Untitled 22.3 GB disk0s4

5: Microsoft Basic Data WindowsSystem 60.0 GB disk0s5

/dev/disk1 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +37.7 GB disk1

Logical Volume on disk0s2

EF0DAAB2-0675-42BA-BBF0-503F6E586497

Unencrypted

MacBook-Air-de-Ricardo:~ Barbieri$ diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 7132A7B6-34BF-44BF-A9C5-FC171DA3D0F6

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

Name: Macintosh HD

Status: Online

Size: 38080155648 B (38.1 GB)

Free Space: 18948096 B (18.9 MB)

|

+-< Physical Volume 0A211CA8-82D0-4CDE-B1DD-7E618260D339

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 38080155648 B (38.1 GB)

|

+-> Logical Volume Family 1B3FC191-1C21-4882-8F49-AE4A205EEB9D

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

Encryption Type: None

|

+-> Logical Volume EF0DAAB2-0675-42BA-BBF0-503F6E586497

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

Disk: disk1

Status: Online

Size (Total): 37708886016 B (37.7 GB)

Revertible: Yes (no decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

MacBook-Air-de-Ricardo:~ Barbieri$ sudo gpt -w -r show /dev/disk0

Password:

gpt: illegal option -- w

usage: gpt [-rv] [-p nparts] command [options] device ...

MacBook-Air-de-Ricardo:~ Barbieri$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 1023 254 63 - 1023 254 63 [ 1 - 236978175] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 07 0 0 0 - 0 0 0 [ 0 - 0] HPFS/QNX/AUX

4: 07 0 0 0 - 0 0 0 [ 0 - 0] HPFS/QNX/AUX

Thanks in advance

MacBook Air, Other OS, BootCamp with Windows 10

Posted on Dec 9, 2015 4:20 PM

Reply

Answer 1

Loner T

Level 9

59,513 points

Dec 9, 2015 5:33 PM in response to RicardoBarbieri

1. What year is your MB Air?

2. Please post the output of

sudo dd if=/dev/rdisk0s5 count=2>/dev/null | hexdump -C

3. From Boot Camp: Resize the Windows partition,

Warning: Do not use other apps or Windows to resize your partitions. If you do so, you could potentially damage your computer and prevent it from starting up.

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Answer 2

Dec 9, 2015 6:09 PM in response to RicardoBarbieri

Hi Leoner, thanks for replay.

My Mac is MacBook Air (13-inch, Mid 2011).

The output is:

MacBook-Air-de-Ricardo:~ Barbieri$ sudo dd if=/dev/rdisk0s5 count=2>/dev/null | hexdump -C

Password:

2+0 records in

2+0 records out

1024 bytes transferred in 0.000555 secs (1844917 bytes/sec)

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Answer 3

Loner T

Level 9

59,513 points

Dec 9, 2015 6:14 PM in response to RicardoBarbieri

My mistake...

sudo dd if=/dev/rdisk0s5 count=1 2>/dev/null | hexdump -C

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Answer 4

Dec 9, 2015 6:16 PM in response to Loner T

Ok, here we are:

Last login: Thu Dec 10 00:07:46 on ttys000

MacBook-Air-de-Ricardo:~ Barbieri$ sudo dd if=/dev/rdisk0s5 count=1 2>/dev/null | hexdump -C

00000000 eb 52 90 4e 54 46 53 20 20 20 20 00 02 08 00 00 |.R.NTFS .....|

00000010 00 00 00 00 00 f8 00 00 3f 00 ff 00 00 e0 23 07 |........?.....#.|

00000020 00 00 00 00 80 00 80 00 ff 17 fc 06 00 00 00 00 |................|

00000030 00 00 0c 00 00 00 00 00 02 00 00 00 00 00 00 00 |................|

00000040 f6 00 00 00 01 00 00 00 ab 02 80 90 1a 80 90 56 |...............V|

00000050 00 00 00 00 fa 33 c0 8e d0 bc 00 7c fb 68 c0 07 |.....3.....|.h..|

00000060 1f 1e 68 66 00 cb 88 16 0e 00 66 81 3e 03 00 4e |..hf......f.>..N|

00000070 54 46 53 75 15 b4 41 bb aa 55 cd 13 72 0c 81 fb |TFSu..A..U..r...|

00000080 55 aa 75 06 f7 c1 01 00 75 03 e9 dd 00 1e 83 ec |U.u.....u.......|

00000090 18 68 1a 00 b4 48 8a 16 0e 00 8b f4 16 1f cd 13 |.h...H..........|

000000a0 9f 83 c4 18 9e 58 1f 72 e1 3b 06 0b 00 75 db a3 |.....X.r.;...u..|

000000b0 0f 00 c1 2e 0f 00 04 1e 5a 33 db b9 00 20 2b c8 |........Z3... +.|

000000c0 66 ff 06 11 00 03 16 0f 00 8e c2 ff 06 16 00 e8 |f...............|

000000d0 4b 00 2b c8 77 ef b8 00 bb cd 1a 66 23 c0 75 2d |K.+.w......f#.u-|

000000e0 66 81 fb 54 43 50 41 75 24 81 f9 02 01 72 1e 16 |f..TCPAu$....r..|

000000f0 68 07 bb 16 68 52 11 16 68 09 00 66 53 66 53 66 |h...hR..h..fSfSf|

00000100 55 16 16 16 68 b8 01 66 61 0e 07 cd 1a 33 c0 bf |U...h..fa....3..|

00000110 0a 13 b9 f6 0c fc f3 aa e9 fe 01 90 90 66 60 1e |.............f`.|

00000120 06 66 a1 11 00 66 03 06 1c 00 1e 66 68 00 00 00 |.f...f.....fh...|

00000130 00 66 50 06 53 68 01 00 68 10 00 b4 42 8a 16 0e |.fP.Sh..h...B...|

00000140 00 16 1f 8b f4 cd 13 66 59 5b 5a 66 59 66 59 1f |.......fY[ZfYfY.|

00000150 0f 82 16 00 66 ff 06 11 00 03 16 0f 00 8e c2 ff |....f...........|

00000160 0e 16 00 75 bc 07 1f 66 61 c3 a1 f6 01 e8 09 00 |...u...fa.......|

00000170 a1 fa 01 e8 03 00 f4 eb fd 8b f0 ac 3c 00 74 09 |............<.t.|

00000180 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 64 69 |............A di|

00000190 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 |sk read error oc|

000001a0 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 |curred...BOOTMGR|

000001b0 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d | is compressed..|

000001c0 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b |.Press Ctrl+Alt+|

000001d0 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 0d 0a |Del to restart..|

000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

000001f0 00 00 00 00 00 00 8a 01 a7 01 bf 01 00 00 55 aa |..............U.|

00000200

MacBook-Air-de-Ricardo:~ Barbieri$

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Answer 5

Loner T

Level 9

59,513 points

Dec 9, 2015 6:38 PM in response to RicardoBarbieri

Your Fdisk output shows some partial records and the first entry show the entire disk in one entry used for a Protective MBR. Was another tool used or attempt made to correct Windows booting?

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Answer 6

Dec 9, 2015 7:00 PM in response to Loner T

Yes, i ran the tool in the windows dvd installation to try repair the boot 😟

Is it saying that the MBR is compressed?

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Answer 7

Loner T

Level 9

59,513 points

Dec 10, 2015 5:55 AM in response to RicardoBarbieri

The following steps are non-standard because there is a third user-visible partition. Typically, there are two such partitions in a normal configuration on a single-disk Mac with OS X and Bootcamp. This is fragile and lack of proper backups can lead to potential data loss. Download GPT Fdisk from http://sourceforge.net/projects/gptfdisk/ and install it on the OS X side. The following steps are executed when booted in OS X. If the 64G is converted to Free Space, these numbers (3 4 5) will change back to (2 3 4).

El Capitan requires disabling SIP to manipulate partitions. This will not work if you boot into Internet Recovery (Command+Opt+R), but only works in Local Recovery (Command+R).

1. Boot into Local Recovery (Command+R).

2. Start Utilities -> Terminal.

3. Type csrutil disable in Terminal and press Enter/Return.

4. Type csrutil status.

5. Boot normally, and type csrutil status to confirm that all individual entries are still disabled.

Once SIP is disabled.

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 10. Accept all other defaults that Gdisk offers. Please see thesample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers. Please see the sample Q&A before you execute these steps.

Sudo gdisk /dev/rdisk0
P (Print list of parts)
R (Recover)
O (print current Hybrid MBR)
H (chooses Hybrid)
Partitions numbers to be hybridized: 3 4 5
Y (Good for GRUB question)
N (part 3 boot flag)
N (part 4 boot flag)
Y (part 5 boot flag make NTFS bootable partition)
O (print current Hybrid MBR)
W (Write the new MBR)
Y (Yes! write the new MBR)
Reboot

Here is sample Q&A for this section. Please notice the Press Enter/Return. Accept defaults offered by Gdisk.

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

Creating entry for GPT partition #3 (MBR partition #2)

Enter an MBR hex code (default AF or AB): Press Enter/Return

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

Creating entry for GPT partition #4 (MBR partition #3)

Enter an MBR hex code (default AB or 0B or 0C): Press Enter/Return

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

Creating entry for GPT partition #5 (MBR partition #4)

Enter an MBR hex code (default 07): Press Enter/Return

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

Reference link - Bootcamp disappears after creating third partition

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Answer 8

Dec 10, 2015 6:07 AM in response to Loner T

Loner T,Loner T

Thank you very much, you saved my day 🙂

It works like a charm and my Windows is back.

Now i need to merge the free space to my Windows partition, do you think that mini tool partition option is safe or is there a better option?

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Answer 9

Loner T

Level 9

59,513 points

Dec 10, 2015 8:09 AM in response to RicardoBarbieri

1. If you are familiar with Linux Live CDs and GParted, you can use that, but it will void the MBR we created, because your GPT 4 will disappear. GPT4 must be converted to Free Space (it is currently JHFS+) and then merged.

2. The second option is to use a Windows cloning tool like Winclone or CampTune and backup the current Windows, remove it, and restore it from backup to a partition of a larger size.

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Answer 10

Dec 10, 2015 9:46 AM in response to Loner T

Thank you again 🙂

I think i understood. after merge two partitions i will get 4 parts (now i have 5) so the MBR will be wrong.

It will work if i repeat that procedure changing numbers (decreasing by one)?

Like:

Sudo gdisk /dev/rdisk0
P (Print list of parts)
R (Recover)
O (print current Hybrid MBR)
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)
O (print current Hybrid MBR)
W (Write the new MBR)
Y (Yes! write the new MBR)
Reboot

Reply

Answer 11

Loner T

Level 9

59,513 points

Dec 10, 2015 10:10 AM in response to RicardoBarbieri

Yes, the steps are correct.

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Answer 12

Dec 10, 2015 5:00 PM in response to Loner T

Oh my God, i've made some serious mistake.

I used GParted to try merge windows partition with the new created partition.

It was a two step process: erase new partition (it was formatted by disk utility when created) and resize the windows partition.

It returned an error and couldn't complete the task.

After that my windows couldn't boot again with message "missing operating system".

So i checked the disk lists in terminal and i have 6 partitions (plus free space) 😕.

I tried to execute the procedure above, but gdisk permit only list 3 partitions, so, the number 6 can't be listed.

I'm so sorry that i've did this stupid thing.

Mac OS is running ok - Windows doesn't show to boot, but it is mounted to access in Mac OS.

It's possible to correct that? i'm considering format entire HD and install all things again.

Some results:

MacBook-Air-de-Ricardo:~ Barbieri$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 38.1 GB disk0s2

3: Microsoft Basic Data 650.0 MB disk0s3

4: Microsoft Basic Data 134.2 MB disk0s5

5: Microsoft Basic Data WindowsSystem 60.0 GB disk0s6

MacBook-Air-de-Ricardo:~ Barbieri$ diskutil cs list

No CoreStorage logical volume groups found

MacBook-Air-de-Ricardo:~ Barbieri$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176

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 236978175

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 74375304 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

74784944 1269536 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

76054480 43474992

119529472 262144 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

119791616 117184512 6 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

236976128 2015

236978143 32 Sec GPT table

236978175 1 Sec GPT header

MacBook-Air-de-Ricardo:~ Barbieri$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 1 - 1023 254 63 [ 1 - 409639] <Unknown ID>

*2: AF 1023 254 63 - 1023 254 63 [ 409640 - 74375304] HFS+

3: AF 1023 254 63 - 1023 254 63 [ 74784944 - 1269536] HFS+

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

MacBook-Air-de-Ricardo:~ Barbieri$ sudo dd if=/dev/rdisk0s5 count=1 2>/dev/null | hexdump -C

00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

*

00000200

MacBook-Air-de-Ricardo:~ Barbieri$

MacBook-Air-de-Ricardo:~ Barbieri$ sudo gdisk /dev/rdisk0

Password:

GPT fdisk (gdisk) version 1.0.1

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: hybrid

BSD: not present

APM: not present

GPT: present

Found valid GPT with hybrid MBR; using GPT.

Command (? for help): p

Disk /dev/rdisk0: 236978176 sectors, 113.0 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00000567-040D-0000-9965-0000AD540000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 236978142

Partitions will be aligned on 8-sector boundaries

Total free space is 43477013 sectors (20.7 GiB)

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

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 74784943 35.5 GiB AF00 Macintosh HD

3 74784944 76054479 619.9 MiB 0700 Recovery HD

5 119529472 119791615 128.0 MiB 0700 Booter

6 119791616 236976127 55.9 GiB 0700 BOOTCAMP

Command (? for help):

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Answer 13

Loner T

Level 9

59,513 points

Dec 10, 2015 5:20 PM in response to RicardoBarbieri

1. Use Gdisk and in the main menu, use the 't' command and change partition 3 from 0700 to AB00.

2. GPT4 when converted to Free Space, will return an error, because there is valid disk - disk0s4 to start with, but Free Space cannot be mounted as a disk.

3. How was GPT5 created?

4. Run the DD command for disk0s6.

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Answer 14

Dec 10, 2015 5:59 PM in response to Loner T

Loner T, thank you very much again.

It was restored for the previous state with windows HD returning the "missing operating system" error.

Can i execute these steps again to make windows partition bootable again?

Sudo gdisk /dev/rdisk0
P (Print list of parts)
R (Recover)
O (print current Hybrid MBR)
H (chooses Hybrid)
Partitions numbers to be hybridized: 3 4 5
Y (Good for GRUB question)
N (part 3 boot flag)
N (part 4 boot flag)
Y (part 5 boot flag make NTFS bootable partition)
O (print current Hybrid MBR)
W (Write the new MBR)
Y (Yes! write the new MBR)
Reboot

outputs now:

MacBook-Air-de-Ricardo:~ Barbieri$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 38.1 GB disk0s2

3: Microsoft Basic Data 650.0 MB disk0s3

4: Microsoft Basic Data 134.2 MB disk0s5

5: Microsoft Basic Data WindowsSystem 60.0 GB disk0s6

MacBook-Air-de-Ricardo:~ Barbieri$ diskutil cs list

No CoreStorage logical volume groups found

MacBook-Air-de-Ricardo:~ Barbieri$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176

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 236978175

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 74375304 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

74784944 1269536 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

76054480 43474992

119529472 262144 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

119791616 117184512 6 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

236976128 2015

236978143 32 Sec GPT table

236978175 1 Sec GPT header

MacBook-Air-de-Ricardo:~ Barbieri$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 1 - 1023 254 63 [ 1 - 409639] <Unknown ID>

*2: AF 1023 254 63 - 1023 254 63 [ 409640 - 74375304] HFS+

3: AF 1023 254 63 - 1023 254 63 [ 74784944 - 1269536] HFS+

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

MacBook-Air-de-Ricardo:~ Barbieri$ Sudo gdisk /dev/rdisk0

GPT fdisk (gdisk) version 1.0.1

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: hybrid

BSD: not present

APM: not present

GPT: present

Found valid GPT with hybrid MBR; using GPT.

Command (? for help): p

Disk /dev/rdisk0: 236978176 sectors, 113.0 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00000567-040D-0000-9965-0000AD540000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 236978142

Partitions will be aligned on 8-sector boundaries

Total free space is 43477013 sectors (20.7 GiB)

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

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 74784943 35.5 GiB AF00 Macintosh HD

3 74784944 76054479 619.9 MiB 0700 Recovery HD

5 119529472 119791615 128.0 MiB 0700 Booter

6 119791616 236976127 55.9 GiB 0700 BOOTCAMP

Command (? for help): r

Recovery/transformation command (? for help): o

Disk size is 236978176 sectors (113.0 GiB)

MBR disk identifier: 0x00002192

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 409639 primary 0xEE

2 * 409640 74784943 primary 0xAF

3 74784944 76054479 primary 0xAF

Recovery/transformation command (? for help): q

MacBook-Air-de-Ricardo:~ Barbieri$ sudo dd if=/dev/rdisk0s5 count=1 2>/dev/null | hexdump -C

00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

*

00000200

MacBook-Air-de-Ricardo:~ Barbieri$

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Answer 15

Loner T

Level 9

59,513 points

Dec 10, 2015 6:18 PM in response to RicardoBarbieri

You need to reboot first which will re-sequence the partitions to 4 5 instead of 5 6. You 3 4 5 is no longer the same as 3 4 5 in the past due to the large Free Space section. Repost the DD command after the reboot/re-sequencing is complete.

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