# dd if=/dev/sdc bs=1M of=/dev/null
dd: error reading '/dev/sdc': Input/output error
2028521+1 records in
2028521+1 records out
2127059001344 bytes (2,1 TB, 1,9 TiB) copied, 11469,7 s, 185 MB/s
# ddrescue -f /dev/sdc /dev/null
GNU ddrescue 1.22
     ipos:    2127 GB, non-trimmed:        0 B,  current rate:    3072 B/s
     opos:    2127 GB, non-scraped:        0 B,  average rate:    160 MB/s
non-tried:        0 B,  bad-sector:    21504 B,    error rate:       0 B/s
  rescued:    3000 GB,   bad areas:        3,        run time:  5h 11m 20s
pct rescued:   99.99%, read errors:       45,  remaining time:          0s
                              time since last successful read:         n/a
Finished