On Sat, Apr 14, 2007 at 09:28:51AM -0700, centos@xxxxxxxxxxxxxxx wrote: > On Sat, 14 Apr 2007 11:20:16 -0500 (CDT) > Barry Brimer <lists@xxxxxxxxxx> wrote: > > > > I have a dozen of drives, ranging from 10Gb to 200Gb. I want to > > > wipe them clean before donating them. I have a IDE/SATA to USB > > > converter that works. I can see the drives properly. > > > > Depending on the filesystem on the drives, shred may be fine > > "man shred" can tell you more. You can also use > > "cat /dev/random > /dev/devicename" as well. > > I have looked at shred before asking, and it said: > > The following are examples of file systems on which shred > is not effective, or is not guaranteed to be effective in > all file system modes: > > * log-structured or journaled file systems, such as those supplied > with AIX and Solaris (and JFS, ReiserFS, XFS, Ext3, etc.) That refers only to shreding files on those filesystems, not shreding the block devices. So shred /dev/device doesn't care about the filesystem in it. > > > How secure is cat /dev/random > /dev/devicename ? Unless you're willing to keep moving your mouse and/or typeing for a couple of days, I don't recomend that. :) /dev/urandom is faster than random and doesn't block, but isn't that much faster. Also, it's a single pass, so I doubt it will be as safe as shred. -- lfr 0/0
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