$ time sudo ddrescue -f /dev/sda /home/makoto/Pictures/d3400_sd_32g.img log
GNU ddrescue 1.23
Press Ctrl-C to interrupt
     ipos:   31914 MB, non-trimmed:        0 B,  current rate:   8257 kB/s
     opos:   31914 MB, non-scraped:        0 B,  average rate:  77275 kB/s
non-tried:        0 B,  bad-sector:        0 B,    error rate:       0 B/s
  rescued:   31914 MB,   bad areas:        0,        run time:      6m 52s
pct rescued:  100.00%, read errors:        0,  remaining time:         n/a
                              time since last successful read:         n/a
Finished                                     

real    6m55.551s
user    0m0.033s
sys     0m0.000s