Securely destroy data on given device

# for i in $(seq 1 25); do dd if=/dev/urandom of=<your disk> bs=1M ; done
Intentional hash in the beginning. May run a looong time. Wipes your data for real. Was meant to be /dev/urandom - I mistyped it. :-)

By: danam
2009-09-29 07:12:34

1 Alternatives + Submit Alt

What Others Think

Wiping data multiple times is not necessary to be secure ( So one time overwriting need less time and is secure enough. Maybe random data could improve the security a bit further. dd if=/dev/urandom of=<your disk> bs=1M Or, if you guarantee to generate enough entropy on your system during the whole wiping process, an even more secure way: dd if=/dev/random of=<your disk> bs=1M
Marco · 602 weeks and 6 days ago
dd if=/dev/zero of=/dev/disk bs=2M conv=fdatasync is good enough on modern disks, and much faster. In fact some drives have an inbuilt 'secure erase' feature which does almost exactly the same thing (in addition the 'secure erase' also overwrites any unused reallocated bad blocks)
Escher · 602 weeks and 6 days ago
linuxrawkstar · 602 weeks and 6 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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