[Solved] Write permission from Mac

How to use TestDisk to recover lost partition
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Posts: 3
Joined: 09 Aug 2015, 23:42

[Solved] Write permission from Mac

#1 Post by randylubin »

Hey there,

I have a dual boot hackintosh (Mac / Windows) and I'm stuck. I was using TestDisk from Windows and saved new partition settings. I rebooted and now I can only access my Mac OS - Windows hangs when I try to load it.

I want to use TestDisk from Mac but I'm getting 'write error' because I can't unmount the drive I'm currently using. Is there any way I can overwrite the partition while I'm on Mac?

I hope that makes some sense! Here's the current readout on the analyze step:

Code: Select all

 1 P EFI System                    40     409639     409600 [EFI System Partitio
 2 P Mac HFS                   409640  233836767  233427128 [OSX]
 3 P Mac Boot               233836768  235106303    1269536 [Recovery HD]
Warning: number of heads/cylinder mismatches 255 (NTFS) != 1 (HD)
Warning: number of sectors per track mismatches 63 (NTFS) != 1 (HD)
 4 P MS Data                235106304  468860927  233754624 [WINDOWS]
Last edited by randylubin on 12 Aug 2015, 23:34, edited 1 time in total.

Posts: 3
Joined: 09 Aug 2015, 23:42

Re: Write permission from Mac

#2 Post by randylubin »

I worked around this by creating a bootable USB using http://en.altlinux.org/Rescue

Looks like I can't easily revert my changes so I'd still love some help!

I think what happened is that I accidentally overwrote some of my Window's partition with a Mac recovery drive. Does anyone have any thoughts on how to best undo this?