Repairing Boot Camp after creating new partition

You should do all commands on /dev/disk1 instead of disk0. disk0 is the SSD, disk1 is the HDD. And disk2 is a logical drive, the "Fusion drive" made from physical devices disk0s2 and disk1s2. So redo the commands with disk1:

sudo gpt -r -v show /dev/disk1

sudo fdisk /dev/disk1

here they are….

sejms-iMac:~ sejms$ sudo gpt -r -v show /dev/disk1

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

gpt show: /dev/disk1: Suspicious MBR at sector 0

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 1756533456 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1756943096 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1758212632 1512

1758214144 195309568 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1953523712 1423

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

sejms-iMac:~ sejms$ sudo fdisk /dev/disk1

Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 sectors]

Signature: 0xAA55

Starting Ending

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

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

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

2: AC 1023 254 63 - 1023 254 63 [ 409640 - 1756533456] <Unknown ID>

3: AB 1023 254 63 - 1023 254 63 [1756943096 - 1269536] Darwin Boot

4: 0B 1023 254 63 - 1023 254 63 [1758214144 - 195309568] Win95 FAT-32

sudo dd if=/dev/rdisk1s5 count=4 2>/dev/null | hexdump -C

This will spit out the contents of the first 4 sectors of the Bootcamp volume and hopefully make clear whether it is in fact FAT32 or NTFS. If you've formatted it, then whatever was there before is likely toast, but Test Disk might get it back if you want to go that route. Otherwise you just point to that BOOTCAMP named volume in the Windows 7 installer and tell it to format it and it will, then it'll let you install Windows.

The Windows installer will allow you to convert this FAT32 volume to NTFS. There should be an Advanced option.

https://help.apple.com/bootcamp/mac/5.0/help/#apd5a4fe62a-dda5-4a8f-aca4-371bc72 6d861

Hi Christopher,

You seem like the expert in this situation. I've been searching for possible solutions to my issue. I recently updated my Mac to Mavericks 10.9.3. I can no longer access Bootcamp. I upgraded to Parallels 9 and that did nothing. I just get the blue screen that brings me back to the boot options (safe mode, last configuration, etc).

I had Windows XP running on my bootcamp partition. Apple says it doesn't support XP, but I've heard others able to do so. When going to Disk Utility, I see the following. So it appears that there's still data on that partition, but I can't access it. When booting and holding ALT, I can go to that partition, but the same blue screen happens.

I would appreciate your guidance in fixing the situation. I'm reading through this forum and just don't know what applies to my situation. I figured I should reach out to you versus start something that isn't correct and end up in a worst situation. I can follow instructions and more than willing to do what it takes to fix this. I have important accounting files on that partition.

Thank you,

Matt

Please start a new thread and post a reference to it here.

What was the sequence of upgrade? 10.9.3. followed by Parallels or the other way? Where in this sequence did the Bootcamp disappear? What OSX version did you upgrade from to 10.9.3?

It is good to see that Bootcamp NTFS is intact and mountable? Can you see files in Bootcamp in Finder? If you have XP installed then it is supported, but new installation of XP is not supported.

Can you post the output of the following two commands?

sudo gpt -r -v show /dev/disk0

sudo fdisk /dev/disk0

I appreciate your help! You can find the answers to your questions here:

No access to Bootcamp after Mavericks upgrade

to Christopher Murphy : first of all Thank you very much for ur efforts 🙂

i was dealing with the main problem of the topic and thanks to you i solve it , but there's some Consequences like i was having

1- mac

2- shared drive [ms-dos (fat)]

3- bootcamp

and i was able to seeing them on windows

now and after solving the boot problem , i'm not able to see the neither ms-dos drive nor mac drive on windows !

so what should i do to fix this issuu ?

thanks

Can you start a new thread and post a reference to it here?

What you want to do isn't supported because three visible partitions means there are actually five partitions: EFI, OS X, Recovery, Shared (FAT32), Boot Camp. And five partitions aren't supported with Boot Camp'd disks until Apple supports native UEFI installs of Windows.

Hi, I had the same error with Windows and did this, and now it says "Operating System Not Found", even though I can read the Windows HD just fine from my main OS X partition. Also after doing the steps outlined here, my boot time for OS X (and the time it takes to reach the options menu in boot up) got exponentially slower... from a few seconds to about five minutes now. How do I fix this?

Thanks!

These are the results of the commands:

Jonathans-MacBook:~ jonathan$ sudo gpt -r -vv show disk0

Password:

gpt show: disk0: mediasize=251000193024; sectorsize=512; blocks=490234752

gpt show: disk0: Suspicious MBR at sector 0

gpt show: disk0: Pri GPT at sector 1

gpt show: disk0: Sec GPT at sector 490234751

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 277618032 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

278027672 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

279297208 33887272 4 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

313184480 1269536 5 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

314454016 175779840 6 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

490233856 863

490234719 32 Sec GPT table

490234751 1 Sec GPT header

Jonathans-MacBook:~ jonathan$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 30515/255/63 [490234752 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 2 - 1023 254 63 [ 1 - 313184479] <Unknown ID>

*2: AB 1023 254 63 - 1023 254 63 [ 313184480 - 1269536] Darwin Boot

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

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

And also:

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 278027671 132.4 GiB AF00 Customer

3 278027672 279297207 619.9 MiB AB00 Recovery HD

4 279297208 313184479 16.2 GiB AF00 Macintosh Future

5 313184480 314454015 619.9 MiB AB00 Recovery HD

6 314454016 490233855 83.8 GiB 0700 BOOTCAMP

I deleted the "Macintosh Future partition" so that and #5 Recovery HD are gone now and now I have:

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

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

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

2: AF 1023 254 63 - 1023 254 63 [ 409640 - 312500000] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 312909640 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 314454016 - 175779840] Win95 FAT32L

You can try this, but it you may need additional Windows Recovery as well, if you have boot issues.

sudo fdisk -e /dev/disk0

setpid 4

07

flag 4

write

This assumes that the underlying boot and NTFS information is intact. Please make sure you have adequate backups.

This worked for me as well. I can't thank you enough. Actually, I modified your directions slightly to also include an ExFat partition I added. I ran into Bootcamp not being recognized after adding an additional partition. Apparently I had corrupted the MBR as you discussed and needed to rebuild it from the GUID (at least I think that's what this just did?).

I am now able to boot into Windows and use my ExFat partition from both operating systems. Amazing.

Thanks this fixed my boot up time and Windows issues! Windows now loads correctly. 🙂 Thank you so much!