On 19 August 2015 at 09:58, Volker Kuhlmann <[email protected]> wrote: > . Heaps of reference has been made to Gutmann's paper and > people wrote heaps of software, while forgetting that it all no longer > applies to their drives..
I should expand that the oft cited gutmann paper is now declared irrelevant to modern hard drives by its author. https://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html#Epilogue Additionally, the 35-pass method he describes was not a "you need this pattern to erase data", but the system simply encompassed a collection of patterns of which, at least one or two would trigger specific behaviour for whatever hardware you had. That is, when he wrote the paper, he was describing the range of devices in the 30 year window preceding, of which, none are still relevant. Around 2005/2006, they stopped even doing horizontal encoding, due to running out of space, and moved to *perpendicular* recording. https://en.wikipedia.org/wiki/Perpendicular_recording And I'm pretty sure that means if there is any magic "flip specific bits to cause a cascade into bits we can't directly read" patterns, they are now radically different. ( Even though I doubt we have enough free atoms in the platter to do this with any more ) -- Kent KENTNL - https://metacpan.org/author/KENTNL _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
