I would leave it at that and let it run. On Sun, Aug 18, 2013 at 9:42 PM, keith smith wrote: > > Thanks for your feedback! I did the 3+1 because that was the standard > config w/o setting a flag to alert that. Also note this is not my area of > expertise. > > ------------------------ > Keith Smith > > ------------------------------ > *From:* Stephen > *To:* keith smith > *Sent:* Sunday, August 18, 2013 9:03 PM > *Subject:* Re: shred vs writing zeros to wipe a drive > > It really depends on the data on the drive. How impactful it would be to > have that data get into the hands of someone else. And is the 12 hour shred > going to equal that. > I would say that if you are running a 3 pass shred another pass of 0s is > not needed. > Also note I think the dod has a 7pass standard (my recollection on this > is possibly out of date or just fuzzy). > On Aug 18, 2013 8:19 PM, "keith smith" wrote: > > > Hi All, > > I have an old computer that I am giving to a friend so I wanted to wipe > the drives in preparation for that. > > The master is 250GB > The slave is 1TB. > > I read a couple articles that suggested using a rescue disk and the shred > utility to take care of this. I also read that shred is not necessary to > just write all zero's to the drive. > > The rescue disk I am using is DVD disk one of CentOS 6.3. > > I ran shred on the fist drive. It took 4.5 hours to run 3 shred passes > plus 1 that writes zeros to the entire drive. > > Command : shred -zv /dev/sda (this was on the master disk) > > Then I ran : dd if=/dev/zero of=/dev/sda bs=16M > > In one of the articles it showed the above command with bs=1M > > Does the size of "bs" matter? > > Also what about the argument that shred is overkill? > > Thanks!! > > Keith > > ------------------------ > Keith Smith > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > http://lists.phxlinux.org/mailman/listinfo/plug-discuss > > > > -- A mouse trap, placed on top of your alarm clock, will prevent you from rolling over and going back to sleep after you hit the snooze button. Stephen