sudo gpt -vv -r show /dev/disk0
sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C
You have a similar issue. Thanks for starting a new discussion. 😉
Please use Bootcamp partition missing after yosemite installation as a reference, download Testdisk and GPT Fdisk, and start the Testdisk part using http://imgur.com/a/PjmnK as a UI guide.
ok doing the scan . i think this will take time right ?
appreciate your help 🙂
The line with Analyse sector shows the percentage completed. It can take some time.
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This is what i get now . what should i do next ?
Press Enter to Continue. This is the list of unrecoverable partitions only.
I pressed continue and this is what came up.
There should be more. If you scroll to the last entry at 1145595, and press down arrow, do you get a new listing?
yes there is more than that
The last HFS entry is 1269536. This is your Recovery HD. Press down arrow and check the next page. This is the partition movement history.
i pressed down arrow and i think thats the end of the list. What are we looking for exactly ?
We are looking for MS Data entries which are roughly the size of the GPT4 and gap. All these entries are exactly 8GB each. If Yosemite did this, it did something really nasty.
Scroll up to the previous MS Data entry and press Enter to Continue.
there are lot of ms data entries which one should i pick and enter to continue... ?
Pick the one right before the entry which says 1269536 in the last column.
Here is what i got.
and it said quit to return to main menu so i entered that.
Missing Operating system after Yosemite update
