I'm responding to both Andres and Alan, because my answers are related. On 2012-11-17 21:02, Andres Muniz wrote: > wow this shred stuff is really interesting. If i have EXT4 running on a > solid state drive (ssd), does it mean that doing a shred will significantly > reduce the life of the ssd?
It will reduce the life of the SSD by one write per block, per pass of shred. On 2012-11-16 17:30, Alan Pope wrote: > More passes don't really give you any benefit. A simple single run of dd > is sufficient. That depends against what you are trying to defend. It is possible, with specialist tools, to recover data after a single wipe. This is especially true when the wipe is done with uniform data, such as all zeros. So if you want to prevent the next owner of a laptop from running photorec, one pass is fine. If you want to stop a data recovery specialist or intelligence agency, it is not. And Andres, securely deleting SSDs requires another tool. I suggest reading the following: http://arstechnica.com/security/2011/03/ask-ars-how-can-i-safely-erase-the-data-from-my-ssd-drive/ http://www.unixmen.com/secure-erase-your-ssd/ http://howto.cnet.com/8301-11310_39-20115106-285/how-to-securely-erase-an-ssd-drive/ Regards, Tyler -- "[...] we are not attacking the corporations, but endeavoring to do away with any evil in them. We are not hostile to them; we are merely determined that they shall be so handled as to subserve the public good. We draw the line against misconduct, not against wealth." -- Theodore Roosevelt -- [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
