[amelius]

See also [1], for a description of why erasing flash memory can't be done reliably with just "dd".

Also, I find it disappointing that the GNU "shred" utility [2] apparently does not work as expected.

[1] http://www.noah.org/wiki/Dd_-_Destroyer_of_Disks#caveat_on_F...

[2] https://www.gnu.org/software/coreutils/manual/html_node/shre...

[comboy]

I feel stupid now. I can't be the only one who used shred on a journaled FS without giving it some thought.

It goes against unix philosophy of a simple tool that only does what it is supposed to do, but some warning from shred that you are using it on FS on which it can't be trusted would be nice.