Today I was install Linux via the thunbdrive by using Win32 Disk Imager.

After installation complete I am format my thunbdrive back to NTFS then I noticed that my space is turn into unallocated.

The solution is use DiskPart instead of Fdisk that not support anymore on windows8.

C:\WINDOWS\system32>diskpart

Microsoft DiskPart version 6.3.9600

Copyright (C) 1999-2013 Microsoft Corporation.
On computer: 3NOLED.IN.TH

DISKPART>  list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          465 GB      0 B        *
  Disk 1    Online         7639 MB      0 B

DISKPART> select disk 1

Disk 1 is now the selected disk.

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART>  create partition primary

DiskPart succeeded in creating the specified partition.

DISKPART> exit

Leaving DiskPart...

C:\WINDOWS\system32>