Bootcamp win8.1 autorepair fail after yosemite upgrade

And to answer you, what do you mean by install ? The first one or my upgrade to yosemite ?

Yes i have an Hybrid MBR as reported on gdisk :

pc12:testdisk-7.0-WIP Denis$ sudo gdisk /dev/disk0

Password:

GPT fdisk (gdisk) version 0.8.10

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): q

pc12:testdisk-7.0-WIP Denis$

MBpro9,1 mid 2012

I remember only 4 partitions at the max

What's an MSR ? You mean ... MBR maybe ?

I only see Hybrid MBR in Gdisk, but maybe i'm wrong ?

There is the hexdump :

pc12:local Denis$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

Password:

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 f8 1e 11 |........?.......|

00000020 00 00 00 00 80 00 80 00 ff ef 0a 00 00 00 00 00 |................|

00000030 aa 74 00 00 00 00 00 00 02 00 00 00 00 00 00 00 |.t..............|

00000040 f6 00 00 00 01 00 00 00 26 e0 5c 16 23 5d 16 7c |........&.\.#].||

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

I will do your test now

Do you know which GUID should i use for bootcamp partition ?

I remember it begins with 07...

0700 i got it ! sorry 🙂

For helping the others, here is my full log :

pc12:~ Denis$ sudo gdisk /dev/disk0

GPT fdisk (gdisk) version 0.8.10

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: 500118192 sectors, 238.5 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 3B7C17EC-ABE9-44EA-852B-8F5021EF63B4

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 500118158

Partitions will be aligned on 32-sector boundaries

Total free space is 26868333 sectors (12.8 GiB)

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

1 2048 411647 200.0 MiB EF00

2 411648 285972703 136.2 GiB AF05 Macintosh HD

3 285972704 287242239 619.9 MiB AB00 Recovery HD

4 287242240 288511999 620.0 MiB 0700

5 288512000 473251839 88.1 GiB 0700

Command (? for help): 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): d

Partition number (1-5): 4

Command (? for help): d

Partition number (1-5):

Partition number (1-5): 5

Command (? for help): p

Disk /dev/disk0: 500118192 sectors, 238.5 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 3B7C17EC-ABE9-44EA-852B-8F5021EF63B4

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 500118158

Partitions will be aligned on 32-sector boundaries

Total free space is 212877933 sectors (101.5 GiB)

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

1 2048 411647 200.0 MiB EF00

2 411648 285972703 136.2 GiB AF05 Macintosh HD

3 285972704 287242239 619.9 MiB AB00 Recovery HD

Command (? for help): n

Partition number (4-128, default 4): 4

First sector (34-500118158, default = 287242240) or {+-}size{KMGTP}: 287242240

Last sector (287242240-500118158, default = 500118158) or {+-}size{KMGTP}: +186009600

Last sector (287242240-500118158, default = 500118158) or {+-}size{KMGTP}: +186009600

Current type is 'Apple HFS/HFS+'

Hex code or GUID (L to show codes, Enter = AF00): 0700

Changed type of partition to 'Microsoft basic data'

Command (? for help): p

Disk /dev/disk0: 500118192 sectors, 238.5 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 3B7C17EC-ABE9-44EA-852B-8F5021EF63B4

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 500118158

Partitions will be aligned on 32-sector boundaries

Total free space is 26868333 sectors (12.8 GiB)

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

1 2048 411647 200.0 MiB EF00

2 411648 285972703 136.2 GiB AF05 Macintosh HD

3 285972704 287242239 619.9 MiB AB00 Recovery HD

4 287242240 473251839 88.7 GiB 0700 Microsoft basic data

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/disk0.

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.

I reboot and tell you the result.

Thanks anyway for your help until now. You have participated a lot to help the community on this problem :-)

I don't have the bootcamp at boot anymore.

Just Macintosh HD.

For me this means i didnt rebuild the HybridMBR.

Should i do it right away ?

Here is the fdisk remembering me another person you already helped before :

pc12:testdisk-7.0-WIP Denis$ sudo fdisk /dev/disk0

Password:

Disk: /dev/disk0 geometry: 31130/255/63 [500118192 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 2 - 25 159 6 [ 1 - 411647] <Unknown ID>

2: AF 25 159 7 - 1023 254 63 [ 411648 - 285561056] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 285972704 - 1269536] Darwin Boot

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

Bootcamp don't show up anymore.

Only Macintosh HD.

In the finder i still see the "system reserved".

For me it means i didnt rebuilded the HybridMBR, isnt it ?