Jacobn617
Level 1
(5 points)
Q: Bootcamp not showing in Devices & Can't transfer files between.
My computer can boot up BOOTCAMP but is not showing up in Finder. It is also not Mounting . I have tried to do system repair on windows 7 but had no problems.
I read multiple discussions about people having their MBR/GPT 's getting corrupt and instaled gdisk to fix it. Then found out that those solutions will not apply to me without messing up my hard drive.
I have Tuxera NTFS and Gdisk installed if thats any help.
I had the command: sudo gpt -r -vv show disk0 shown and this is what appeared.
gpt show: disk0: mediasize=500107862016; sectorsize=512; blocks=976773168
gpt show: disk0: Suspicious MBR at sector 0
gpt show: disk0: Pri GPT at sector 1
gpt show: disk0: Sec GPT at sector 976773167
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 586340368 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
586750008 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
588019544 168
588019712 144130048 4
732149760 244623360 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
976773120 15
976773135 32 Sec GPT table
976773167 1 Sec GPT header
And have done the: sudo fdisk /dev/disk0 command.
| Disk: /dev/disk0 | geometry: 60801/255/63 [976773168 sectors] |
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 0 0 2 - 25 127 14 [ 1 - 409639] <Unknown ID>
2: AF 25 127 15 - 1023 254 63 [ 409640 - 586340368] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 586750008 - 1269536] Darwin Boot
*4: 07 1023 254 63 - 1023 254 63 [ 588019712 - 388753408] HPFS/QNX/AUX
If that is any help. Please help, i've had this problem for ages and had to painstakingly wait about 10 min just to transfer files via USB.
EDIT: I also have had my partition resized when this occoured.
MacBook Pro (13-inch, Mid 2012), OS X Mountain Lion (10.8.2), Really Awesome
Christopher Murphy
Level 3
(555 points)
What did you use to resize the NTFS volume?
The problem is that the tool you used to resize the NTFS volume updated the MBR but didn't update the GPT. OS X only uses the GPT, and since the partition is invalid in the GPT, the NTFS volume doesn't mount. The MBR must have the correct entry, and that's why you can still boot.
Only tools explicitly designed for resizing Bootcamp'd disks know to update both the MBR and the GPT. So you're kinda lucky this hasn't totally hosed both systems. I suggest backing up before you do anything else. Use Windows backup or even file copy to get the most important stuff off the Windows side, and also make sure you have a current OS X backup also. Then you can proceed.
What you need to do is delete GPT entry #4, and use the information from the MBR entry #4 to create a new GPT #4 entry. You can do this with gdisk. The basic steps in gdisk:
1. p to print the GPT partition table
2. Confirm in the list that partition 4 starts at LBA 732149760, and if so delete this partition. That's d <enter> then enter the partition number to delete.
3. n to create a new partition. The start sector is 588019712, the end sector is 976773119. The partition type code is 0700.
4. r to get to the recovery/transform menu.
5. h to create a new hybrid mbr
6. 2 3 4 to add GPT partitions 2 3 4 to the MBR.
7. y to put EFI GPT as the first MBR entry.
8. For all prompts to enter an MBR hex code, just hit return, which will accept the default.
9. For GPT partition 2 and 3, do NOT make them bootable.
10. For GPT partition 4, DO make it bootable.
11. type o <return> p <return> and post the results if you want and I'll proof read it before you commit. Just leave gdisk at that prompt don't close Terminal or quit gdisk. The changes are in memory.
When you're ready to commit, you'll type w to write it out to disk. Then you need to reboot.
