Disk Utility says MBR; gpart says GPT. Lion will not install. Help?

[mulletman13]

Hey all,

 

So I started out with a fresh vanilla GPT single partition of OSX. Then, I installed Windows 7. To be able to boot back into my OSX drive, I used a utility GPTSync to 'fix' the partition scheme.

 

Since then, whenever I boot I get a couple of EBIOS Error 0x01 (this affects nothing, I am able to reach chamelon and boot normally). Now, when I'm trying to update to Lion, DU claims my drive is MBR.

 

I'm running a program called gdisk (http://sourceforge.net/projects/gptfdisk/), which claims to change the partition table from MBR into GPT, however it is claiming that my drive and partitions are GPT.

 

I would appreciate any sort of guidance on where to go from here. I'm really not looking forward to a complete wipe of two partitions; but if I must, then I suppose I will. Any information is very much appreciated.

 

Here is the output that gptsync puts out:

 

 

bendall-pc:dev bendall$ sudo gptsync disk0

Password:

 

Current GPT partition table:

# Start LBA End LBA Type

1 40 409639 EFI System (FAT)

2 409640 855877927 Mac OS X HFS+

3 875468800 976773119 Basic Data

 

Current MBR partition table:

# A Start LBA End LBA Type

1 1 409639 ee EFI Protective

2 409640 855877927 af Mac OS X HFS+

3 875468800 976773119 07 NTFS/HPFS

4 976773120 976773167 ee EFI Protective

 

Status: Tables are synchronized, no need to sync.

 

 

.... so there are two partition tables? I don't necessarily follow.

[dmazar]

I was reading lately about this stuff. Maybe it will help:

http://www.rodsbooks.com/gdisk/hybrid.html

 

specially:

http://www.rodsbooks.com/gdisk/hybrid.html#reactions

More than one partition of type 0xEE causes Mac OS X to treat the disk as an MBR disk rather than a GPT disk.