Quick question: With dd (and dcfldd) it's east to write "0" (zeros) out to a drive but how can you write just *1" (ones) out instead?
On 11 August 2010 12:33, Vince Marsters <vi...@marsters.co.uk> wrote: > On Wed, 2010-08-11 at 12:15 +0100, John Matthews wrote: > > What about hd you are still using, but have deleted stuff on them. Is there > any way to bring that back, or even completely delete it? > > I had a program for windows when i used it, but I cant find anything for > linux. > > > For data recovery you can use testdisk (its in the Universe repo for > Lucid). > > As for completely delete it then the only way to be 100% certain is to > physically destroy the drive but I have been informed by a KrollOntrack > employee (they do commercial data recovery as well as commercial erasing > solutions) that 3 overwrites with different data stops them from recovering > data from a drive. > > Also it is important to make sure that when doing secure erases that the > bit pattern is different for each wipe (e.g. if you write zeros on the first > pass then there should be no zeros in the second). Using one of the Gov > approved schemes will usually do this. > > For most home users a single random wipe will be more than enough as this > prevents most people getting at any of the data. > > Vince > > -- > ubuntu-uk@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk > https://wiki.ubuntu.com/UKTeam/ > > -- Regards Bill Cumming Twitter: @s0l_uk Skype: s0litaire eMail: b...@s0l.co.uk
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