On 1/26/19 2:45 PM, Jonathan Ryshpan wrote:
They both do it at about the same speed, about 40Mbytes/sec., which
probably about the max transfer rate to the drive. Another instance of
$ shred -v -n1 /dev/sdb
applied to an internal drive (which I also plan to dispose of) ran at
least twice as fast. Unfortunately I have no actual timings. Another
indication that the shredding rate is bounded by the transfer rate.
Unless you're using esata or USB3, the internal one will be much faster.