Okay so I'm trying to format my hdd to ntfs on Ubuntu 13.04 and it gives me two options, Don't overwrite existing data(Quick), and Overwrite existing data with zeroes(Slow). What does it mean to overwrite the existing data with zeroes? I plan on installing windows 7 but it says my hdd must be in NTFS format. Please help me with this.Thanks in advance.

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    Use the quick option, and should be work just fine. – NickTux Aug 16 '13 at 19:06

The overwrite with 0's will literally write #FFFFFF to every sector on the harddrive, permanently erasing the data that was there. This is a technique used to remove all data fragments which might be left on the drive. It's usually used when pernicious malware is expected or as part of a data-wipe routine.

Chances are, you just need the quick option.

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    In fact, to complete erase the data you'd have to overwrite it with zeroes several times or overwrite with randoms. For the rest I agree. – don.joey Aug 16 '13 at 19:06
  • @Private - Great extension, and yea most do several passes to ensure the wipe. – Colyn1337 Aug 16 '13 at 19:27
  • Thanks so much you guys! Much appreciated! Will come back to say how everything goes, who knows who else might be wondering about this. – user184529 Aug 16 '13 at 20:01
  • @user184529 Please accept the answer if you're satisfied with the response :] – Colyn1337 Aug 16 '13 at 20:03
  • t didn't work i still get a message saying "Windows cannot be installed to this hard disk space. Windows must be installed to a partition formatted as NTFS. The partition is of an unrecognized type" – user184529 Aug 16 '13 at 20:11

If it is SSD, you only need to overwrite it once for security since it is not magnetic. Overwriting it several times is bad for SSD's. Also, use MBR then NTFS if you plan to install windows. Regards.

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