[ubuntu-uk] mbr

paul sutton zleap at zleap.net
Sat Jan 28 20:16:19 UTC 2012

On 28/01/12 18:40, scoundrel50a wrote:
> On 28/01/12 16:27, Ted Wager wrote:
>> On Sat, 2012-01-28 at 14:46 +0000, Andy Smith wrote:
>>> Hello,
>>> On Sat, Jan 28, 2012 at 10:41:36AM +0000, Ted Wager wrote:
>>>> I used gparted to blank a couple of hdd's that I am getting rid of
>>>> however the mbrr was not formatted and they still boot from grub.
>>>> Anyone tell me how I format the drive so it is completely blank ?
>>> Ah, the old "how do I securely erase a drive" chestnut. :) People
>>> are often keen to go into a lot of detail about the ingenious
>>> methods they use to overwrite data, destroy drives, etc. etc.
>>> because clearly the security of their data is of immense importance
>>> and you just can't be sure, right?
>>> For all practical purposes, overwriting the entire disk just once
>>> with something like dd, e.g.:
>>>      $ sudo dd if=/dev/zero of=/dev/sda bs=4M
>>> will render it unrecoverable. No data recovery company will promise
>>> to be able to get any data whatsoever off of that. This is the
>>> quickest way to achieve what you want while still ending up with a
>>> working drive. If someone thinks they can get any data off of that,
>>> they should be asked why they aren't in the commercial data recovery
>>> business, since they apparently know how to do it better than anyone
>>> else who is. :)
>>> In theory there may be data left in inaccessible areas of the drive,
>>> such as the spare sectors that the manufacturer included.  In theory
>>> an entity with a vast amount of resources may be able to take your
>>> drive apart in a lab and use minute differences in magnetic field to
>>> guess at what was written before the single pass of data was written
>>> over the top by dd.
>>> If that is a realistic risk for you¹, then you may want to retire to
>>> your island stronghold and instruct a henchman to run Darik's boot
>>> and nuke (DBAN). This may take a day or more, especially if you use
>>> one of the more thorough modes.
>>> If you need quick and don't care about the drive working afterwards,
>>> melt the platters to liquid or grind them down to dust.
>>> Cheers,
>>> Andy
> What is so wrong about wanting to be able to securely wipe an
> hdd.........and why do people feel the need to be so condescending
> when somebody asks about it.......trying to make the person asking
> look guilty......funny thing, you seem to know how to do it, even with
> the attitude......
Agreed as in some cases you HAVE to ensure date can't be recovered.   Or
you may simply want to start over and re-install the system,  so a fully
blank hdd,  can rule out any problems that may occur later on. 




skype : psutton111

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