On Fri, 2019-01-25 at 21:58 -0800, Samuel Sieb wrote:
> On 1/25/19 6:45 PM, Jonathan Ryshpan wrote:
> > I'm using shred on some 2Tb USB disk drive that I plan to give away. So 
> > far it has taken 8 hours to shred 50% of the drive, which implies that 
> > it will take about 16 hours to shred the whole drive. I have another 2 
> > drives to go.
> > 
> > Is there a quicker way to protect my data when I give the drives away, 
> > other than smashing the drives to bits?
> 
> If you don't have state secrets on your hard drive and you don't expect 
> that the NSA will be using million dollar equipment to scan your drive, 
> a single pass with "dd if=/dev/urandom of=/dev/sdx bs=1M" should be 
> sufficieshred -v -n1 /dev/sdcnt and will write at the max speed of
> the hard drive.
 
I'll give dd a try; but I don't see offhand why
   dd if=/dev/urandom of=/dev/sdc bs=1M
should be quicker than what I'm using now, namely
   shred -v -n1 /dev/sdc

Thanks to all for your help - jon

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