Repairing Boot Camp after creating new partition

Loner T wrote:

Christopher Murphy wrote:

I really should stick to my mantra of making thread jackers start their own thread, to avoid exactly this kind of confusion, so that everyone gets their own thread and no interruptions.

Apologies, Christopher. I mention it every time I see a new request, but some do, some do not. I will try and suggest it a bit more forcefully next time.

Correct, my fault, I apologize.

So I opened a new one here

Apology not indicated. It's not my forum or thread. I'm only suggesting what I feel I should do: ask for a new thread and if one doesn't appear, let the request for help go unanswered.

On a clean mac, the volume has become CoreStorage rather than a regular HFS+.

This is the Yosemite default? Is it a single disk (not SSD and HDD "fusion")? And it's not encrypted? I wonder what this is about.

Yes. (I removed the CSM-BIOS install last week to play with EFI. I will go back to CSM-BIOS tomorrow, so I can also post the MBR). The machine (13" 2012 MBP) has a single 256GB SSD. You can see disk0s2 and the GPT 2 partition type. All my clean OS X installs show up like this. I will preserve some screens and rebuild this machine from scratch.

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *256.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 128.7 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Reserved 134.2 MB disk0s4

5: Microsoft Basic Data 126.4 GB disk0s5

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS OSY-MBP13 *128.3 GB disk1

Logical Volume on disk0s2

AFB7276E-51EF-478F-98A1-47D941BD9843

Unencrypted

sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=256060514304; sectorsize=512; blocks=500118192

gpt show: /dev/disk0: PMBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 500118191

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 251330040 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

251739680 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

253009216 704

253009920 262144 4 GPT part - E3C9E316-0B5C-4DB8-817D-F92DF00215AE

253272064 246845440 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

500117504 655

500118159 32 Sec GPT table

500118191 1 Sec GPT header

What do you get for 'diskutil cs list' ? The UUIDs you can delete/strikeout, those are actually unique in contrast to the fixed partition type GUIDs gpt outputs.

DU has a default which upon detecting a SSD/HDD in the machine, creates Fusion drives, but that is not the case here.

diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group ADCAE521-6032-404B-9DDC-951F9D1622ED

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

Name: OSY-MBP13

Status: Online

Size: 128680980480 B (128.7 GB)

Free Space: 0 B (0 B)

|

+-< Physical Volume A8202798-E4A1-4604-81A7-66E45DCBD599

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 128680980480 B (128.7 GB)

|

+-> Logical Volume Family ADA8D63F-CF2E-43CF-B685-9F67DBC89D78

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

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

|

+-> Logical Volume AFB7276E-51EF-478F-98A1-47D941BD9843

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

Disk: disk1

Status: Online

Size (Total): 128328658944 B (128.3 GB)

Conversion Progress: -none-

Revertible: Yes (no decryption required)

LV Name: OSY-MBP13

Volume Name: OSY-MBP13

Content Hint: Apple_HFS

Interesting, I wonder what the advantages are. It makes it impossible, for the moment, to read HFS+ volumes on Linux. And as far as I know, 3rd party HFS+ read/write support for Windows only understands HFS+, and now it needs to understand CoreStorage also or it won't work either.

New thread to discuss CoreStorage and W8.1 support - OSX and Bootcamp discussion

Followed your steps 100% and I have to say, thank you so much! Solved the problem with no issues! You shall be receiving points!

Sorry! You should be receiving points! I messed that up haha!

Hi Christopher,

Hopefully you can help me, too. I am trying to install Windows 7 via Bootcamp but ran into the same problem that after running Bootcamp and restarting I get the error message "No bootable device --- insert boot disk and press any key".

I am running OS X 10.10 Beta with a DIY Fusion Drive consisting of a 120 GB SSD and a 1 TB HDD. I followed the steps you recommended to the original question but with no luck.

In my case I believe the interesting disk is disk1. Here is the output of the terminal commands you usually ask for:

gpt show: disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168

gpt show: disk1: Suspicious MBR at sector 0

gpt show: disk1: Pri GPT at sector 1

gpt show: disk1: Sec GPT at sector 1953525167

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 1709658208 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1710067848 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1711337384 88

1711337472 242186240 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1953523712 1423

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

Disk: /dev/disk1

geometry: 121601/255/63 [1953525168 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 2 - 1023 254 63 [ 1 - 1711337471] <Unknown ID>

*2: 07 1023 254 63 - 1023 254 63 [1711337472 - 242186240] HPFS/QNX/AUX

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

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

I am a little confused by this one because all afternoon I saw a different output with 1 and 2 being <Unknown ID>, 3 being Darwin something and 4 MS-FAT, I think.

Here is also the list of my disks:

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *120.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 119.7 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage 875.3 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

4: Microsoft Basic Data BOOTCAMP 124.0 GB disk1s4

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS FusionDrive *975.5 GB disk2

Logical Volume on disk0s2, disk1s2

FFA13FBC-2001-40B7-8BBB-BE6EECF8AC11

Unencrypted Fusion Drive

/dev/disk3

#: TYPE NAME SIZE IDENTIFIER

0: GRMCPRXFRER_DE_DVD *3.2 GB disk3

Any help would be greatly appreciated!

Can you post a new thread with a reference to it here? CoreStorage will allow Bootcamp only on the second disk, unless your use "trickery" to put bootcamp on the SSD.

The fdisk entry has the first entry as everything up to 1711337472.

BTW 10.10 is a beta release with possible bugs.

I thought it might be because of the Beta version but since I could install it on the MacBook also running Yosemite and since there are several forums and YouTube videos about this error message on the internet from before Yosemite (which didn't solve my problem) I don't think it has to do with that. Anyway, I started a new thread here: https://discussions.apple.com/thread/6520991

Hosts will take down any 10.10 threads till it is Generally Available. 😟 Please post without references to 10.10.

Thank you for the hint. Here is the link to the new thread: https://discussions.apple.com/thread/6521129