laptopdude@trichiliocosm:~/data$ dd if=/dev/urandom bs=4096 count=7000000 | pv > test.garbage
7000000+0 records in8MiB/s] [                                                     <=>                            ]
7000000+0 records out
26.7GiB 0:02:47 [ 163MiB/s] [                                                   <=>                              ]
28672000000 bytes (29 GB, 27 GiB) copied, 167.666 s, 171 MB/s

laptopdude@trichiliocosm:~/data$ dd if=/dev/urandom count=7000000 | pv > test.garbage
7000000+0 records in3MiB/s] [                                                                     <=>            ]
7000000+0 records out
3.34GiB 0:00:43 [79.3MiB/s] [                                                                       <=>          ]
3584000000 bytes (3.6 GB, 3.3 GiB) copied, 43.1201 s, 83.1 MB/s