Nice to meet you.
My issue: by mistake, I booted through F4 key: Samsung Recovery Solution (Windows Recovery), and this broke my Partition D:\ hard drive data in NTFS. Awful software!

Netbook Samsung, OS: windows 7 sp1 32-bit.
Hard Disk Drive 2.5": Hitachi HTS543232A7A384
Windows displays the lost partition (before D:), as Uncategorised Letter, without options, and marked as Partition Recovery: 226GB. Currently, Partition OEM.

GParted Live displays:

Flag: DIAG, removing this, the trouble remains.
I had to create another User Account Windows, because the former account left the system slow to starting system and exploring files. And warning: "...\Desktop refers to a location that is not available."
The info displays by GParted about this lost partition D: is:
Size: 226.33 GiB
First Sector: 115.957.169
Last Sector: 590.596.095
All sectors: 474.638.927
TestDisk 7.0 displays this after Deep Search (It doesn't match the sizes displayed by GParted):


However, through TestDisk just clicking on "Analise" or "Advanced", these display the right size of the lost partition. Being labeled "Diag", TestDisk displays the lost partition with the name "4 P Compaq Diagnostics", it's that!:


TestDisk Log (after Quick Search):
Code: Select all
Thu Aug 20 14:28:53 2015
Command line: TestDisk
TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
OS: Windows 7 (7601) SP1
Compiler: GCC 4.8, Cygwin 1007.34
Compilation date: 2015-04-18T13:01:55
ext2fs lib: 1.42.8, ntfs lib: 10:0:0, reiserfs lib: 0.3.1-rc8, ewf lib: 20120504, curses lib: ncurses 5.9
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(/dev/sda)=320072933376
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\PhysicalDrive0)=320072933376
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\C:)=59255939584
Hard disk list
Disk /dev/sda - 320 GB / 298 GiB - CHS 38913 255 63, sector size=512
Drive C: - 59 GB / 55 GiB - CHS 7204 255 63, sector size=512
Partition table type (auto): Intel
Disk /dev/sda - 320 GB / 298 GiB
Partition table type: Intel
Analyse Disk /dev/sda - 320 GB / 298 GiB - CHS 38913 255 63
Geometry from i386 MBR: head=255 sector=63
NTFS at 0/32/33
NTFS at 12/223/20
check_part_i386 3 type 27: no test
check_part_i386 4 type 12: no test
Current partition structure:
1 * HPFS - NTFS 0 32 33 12 223 19 204800
2 P HPFS - NTFS 12 223 20 7216 254 63 115734257
3 P Windows RE(store) 36762 231 14 38913 5 4 34541568
4 P Compaq Diagnostics 7217 254 63 36762 231 13 474638927
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
Failed to startup volume: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
Failed to startup volume: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
Failed to startup volume: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
Failed to startup volume: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
Failed to startup volume: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.
Failed to startup volume: Input/output error.
$MFT has invalid magic.
ntfs_mft_load(): Failed.
Failed to load $MFT: Input/output error.