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Level 1

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Windows partition not bootable after update.

All, As per a few others, I'm unable to boot into windows after an update.

In system preferences, under startup disk, only the OS X drive is shown.

The disk utility does show my 'MacDoze' drive greyed out. This drive was changed to a 3tb unit about a year ago and has been dual booting just fine.

diskutil list gives me the following:-

192168015007:~ pom$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *3.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 100.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data MacDoze 399.0 GB disk0s4

5: Microsoft Basic Data 0 B disk0s5

192168015007:~ pom$

and diskutil cs list as below:-

192168015007:~ pom$ diskutil cs list

No CoreStorage logical volume groups found

192168015007:~ pom$

sudo gpt -vv -r show /dev/disk0 results below:-

gpt show: /dev/disk0: mediasize=3000592982016; sectorsize=512; blocks=5860533168

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 5860533167

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 195797056 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

196206696 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

197476232 120

197476352 779296768 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 0 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 3318192128 4

4294965248 1565567887

5860533135 32 Sec GPT table

5860533167 1 Sec GPT header

Any and all assistance appreciated.

Cheers.

iMac, OS X Yosemite (10.10.4)

Posted on Jul 1, 2015 6:01 PM

36 replies

Loner T

Level 9

59,471 points

Jul 26, 2015 5:58 AM in response to Pom_VZ

Disk shows three entries, but GPT command shows 4. Can you reboot? The kernel seems to be using a cached version. After reboot, please post the output of

sudo gpt -vv -r show /dev/disk0

sudo gdisk /dev/disk0

Let us make sure they are in sync.

Pom_VZ Author

Level 1

0 points

Jul 26, 2015 6:07 AM in response to Loner T

As requested.

192168015006:~ pom$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=3000592982016; sectorsize=512; blocks=5860533168

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 5860533167

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 195797056 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

196206696 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

197476232 120

197476352 4097488896 4 MBR part 7

4294965248 1565567887

5860533135 32 Sec GPT table

5860533167 1 Sec GPT header

and

192168015006:~ pom$ sudo gdisk /dev/disk0

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: hybrid

BSD: not present

APM: not present

GPT: present

Found valid GPT with hybrid MBR; using GPT.

Command (? for help): p

Disk /dev/disk0: 5860533168 sectors, 2.7 TiB

Logical sector size: 512 bytes

Disk identifier (GUID): 00000E82-4754-0000-7204-0000CB700000

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 976773134

Partitions will be aligned on 8-sector boundaries

Total free space is 779296909 sectors (371.6 GiB)

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

1 40 409639 200.0 MiB EF00 EFI system partition

2 409640 196206695 93.4 GiB AF00 Customer

3 196206696 197476231 619.9 MiB AB00 Recovery HD

Ta,

Loner T

Level 9

59,471 points

Jul 26, 2015 7:27 AM in response to Pom_VZ

1. Run Gdisk and use the 'b' command to back up the current GPT.

2. Run sudo gpt -vv destror /dev/disk0 - which destroys your current GPT.

3. Rebuild the primary GPT using the values we have (The explanation in parentheses should not be typed).

sudo gdisk /dev/rdisk0

p (Print)

x (Go To Expert Menu)

l (Set Alignment to 1 sector)

m (Go To Main Menu)

n (New)

1 (Part 1 - EFI)

+409639 (Use the '+' notation to define size).

EF00

n (New)

2 (Part 2 - HFS+)

409640

+195797056

AF00

n (New)

3 (Part 3 - Recovery HD)

196206696

+1269536

AB00

n (New)

4 (Part 4 - Microsoft Basic Data)

197476352

+4097488896

0700

Reboot and verify that OSX boots. If it does not, we will need to install OSX on external disk - OS X: Installing OS X on an external volume - Apple Support .

Please verify the values before you make changes. This is a destructive step.

Pom_VZ Author

Level 1

0 points

Jul 26, 2015 7:36 AM in response to Loner T

Will proceed as suggested.

As for verifying values, your knowledge is superior to mine by a factor that I can't determine. Will do a basic check against the data I have for Typo's, but in your hands!

See if I'm back on shortly?!?

Pom_VZ Author

Level 1

0 points

Jul 26, 2015 7:48 AM in response to Pom_VZ

OK. Command glitch. Did the backup OK but got this on your next step:-

Last login: Mon Jul 27 00:42:35 on ttys000

192168015006:~ pom$ sudo gpt -vv destror /dev/disk0

gpt: unknown command: destror

192168015006:~ pom$

Figuring that destror may have been destroy, I tried that and got:-

192168015006:~ pom$ sudo gpt -vv destroy /dev/disk0

gpt destroy: unable to open device '/dev/disk0': Resource busy

192168015006:~ pom$

Cheers,

Loner T

Level 9

59,471 points

Jul 26, 2015 8:19 AM in response to Pom_VZ

Please install OS X on an external disk and boot from it. The device is busy because it is your boot device.

then

sudo gpt -vv destroy disk0

You will also need to install GPT Fdisk on the eternal disk so you can execute the steps outlined.

Windows partition not bootable after update.