So I have this 2TB external drive which held two 250GB HFS+ partitions for time machine backups + one 1.5 TB NTFS partition at the end of the drive containing some downloads.
I recently moved my time machine backups to iSCSI, so I wanted to delete the HFS+ partitions and expand the NTFS partition to use the entire drive.
Thinking the most NTFS-savvy and therefore safest OS would be Windows, I booted up Windows 7. I deleted the two HFS+ partitions and a small EFI partition which Mac OS X really loves to create for no good reason, and then I went and asked Windows to extend the NTFS partition. This failed pretty much immediately with some non-descriptive error which escapes me.
It did, however, have time to write a new GPT and hybrid MBR which looks like this:
And now I have a defunct drive. I'm not sure what those two partitions at the start are for (guessing something the failed extend operation would need in order to complete its job?). I'm also not sure what to make of the "LDM data partition" stuff.
Number Start (sector) End (sector) Size Code Name
1 2082 4129 1024.0 KiB 4201 LDM metadata partition
2 4130 262177 126.0 MiB AF00 Microsoft reserved part
3 262178 3907029134 1.8 TiB 4200 LDM data partition
What I do know, is that I can no longer get any OS to recognize my NTFS partition on there. Naturally, I'd say, as that partition actually starts quite some number of sectors beyond 262178 which GPT claims. So, any fs prober would just see some random data at the place it expects to see whatever it needs to see to determine FS type.
I'm not panicking yet (won't regardless, at it isn't exactly the most important stuff that's on there), but I'm a bit unsure what my next step should be.
My previous step should've been backing up the GPT, but obviously I had to learn that the hard way.
Is there a clever way to scan the approximate area of where the NTFS partition actually starts for some kind of binary signature so that I can manually reconstruct the GPT?
Or perhaps another method which would help me reconstruct my partition/data?
Thanks in advance,