mint@mint:~$ sudo ddrescue -n -v -b 4096 /dev/sdc2 /dev/sdd1 mapfile
ddrescue: /dev/sdd1: Output file exists and is not a regular file.
ddrescue: Use '--force' if you really want to overwrite it, but be
aware that all existing data in the output file will be lost.
Try 'ddrescue --help' for more information.
mint@mint:~$ sudo ddrescue -n -v -b 4096 /dev/sdc2 /dev/sdd1 --force mapfile
GNU ddrescue 1.27
About to copy 4000 GBytes from '/dev/sdc2' to '/dev/sdd1'
Starting positions: infile = 0 B, outfile = 0 B
Copy block size: 16 sectors Initial skip size: 9776 sectors
Sector size: 4096 Bytes
Press Ctrl-C to interrupt
ipos: 3977 GB, non-trimmed: 2572 kB, current rate: 47162 B/s
opos: 3977 GB, non-scraped: 0 B, average rate: 119 MB/s
non-tried: 3703 GB, bad-sector: 0 B, error rate: 1521 B/s
rescued: 296182 MB, bad areas: 0, run time: 41m 13s
pct rescued: 7.40%, read errors: 102, remaining time: 14d 13h 31m
time since last successful read: 0s
Copying non-tried blocks... Pass 1 (forwards)
ipos: 296222 MB, non-trimmed: 7393 kB, current rate: 47162 B/s
opos: 296222 MB, non-scraped: 0 B, average rate: 119 MB/s
non-tried: 3703 GB, bad-sector: 0 B, error rate: 1521 B/s
rescued: 296182 MB, bad areas: 0, run time: 41m 13s
pct rescued: 7.40%, read errors: 204, remaining time: 908d 22h
time since last successful read: 0s
Copying non-tried blocks... Pass 2 (backwards)
ipos: 321360 MB, non-trimmed: 25183 MB, current rate: 0 B/s
opos: 321360 MB, non-scraped: 0 B, average rate: 119 MB/s
non-tried: 3678 GB, bad-sector: 0 B, error rate: 2158 MB/s
rescued: 296182 MB, bad areas: 0, run time: 41m 19s
pct rescued: 7.40%, read errors: 384362, remaining time: n/a
time since last successful read: 6s
Copying non-tried blocks... Pass 5 (forwards)
ddrescue: /dev/sdc2: Input file disappeared: No such file or directory
mint@mint:~$ sudo ddrescue -n -v -b 4096 /dev/sdc2 /dev/sdd1 --force mapfile
GNU ddrescue 1.27
About to copy 4000 GBytes from '/dev/sdc2' to '/dev/sdd1'
Starting positions: infile = 0 B, outfile = 0 B
Copy block size: 16 sectors Initial skip size: 9776 sectors
Sector size: 4096 Bytes
Press Ctrl-C to interrupt
Initial status (read from mapfile)
rescued: 296182 MB, tried: 25183 MB, bad-sector: 0 B, bad areas: 0
Current status
ipos: 4000 GB, non-trimmed: 25183 MB, current rate: 438 MB/s
opos: 4000 GB, non-scraped: 0 B, average rate: 88787 kB/s
non-tried: 0 B, bad-sector: 0 B, error rate: 0 B/s
rescued: 3974 GB, bad areas: 0, run time: 11h 30m 31s
pct rescued: 99.37%, read errors: 0, remaining time: 58s
time since last successful read: 0s
Copying non-tried blocks... Pass 5 (forwards)
ipos: 4000 GB, non-trimmed: 0 B, current rate: 4956 kB/s
opos: 4000 GB, non-scraped: 0 B, average rate: 88976 kB/s
non-tried: 0 B, bad-sector: 0 B, error rate: 0 B/s
rescued: 4000 GB, bad areas: 0, run time: 11h 33m 46s
pct rescued: 100.00%, read errors: 0, remaining time: 0s
time since last successful read: n/a
Trimming failed blocks... (forwards)
Finished