@codex:~$ sudo ddrescue -f -n /dev/sde /dev/sdc ddrescuelog1.log
Press Ctrl-C to interrupt
Initial status (read from logfile)
rescued:         0 B,  errsize:       0 B,  errors:       0
Current status
rescued:        3 TB,  errsize:    8192 B,  current rate:     3132 B/s
   ipos:     1327 GB,   errors:       2,    average rate:   82946 kB/s
   opos:     1327 GB,     time from last successful read:       0 s
Finished

@codex:~$ cat ddrescuelog1.log
# Rescue Logfile. Created by GNU ddrescue version 1.14
# Command line: ddrescue -f -n /dev/sde /dev/sdc ddrescuelog1.log
# current_pos  current_status
0x13520002E00     +
#      pos        size  status
0x00000000  0x13520002000  +
0x13520002000  0x00000E00  /
0x13520002E00  0x00000200  -
0x13520003000  0x457FFF000  +
0x13978002000  0x00000E00  /
0x13978002E00  0x00000200  -
0x13978003000  0x18129473000  +

@codex:~$ df -Th
Filesystem             Type      Size  Used Avail Use% Mounted on
/dev/mapper/codex-root ext4      110G   18G   87G  17% /
udev                   devtmpfs  3.9G  4.0K  3.9G   1% /dev
tmpfs                  tmpfs     1.6G  840K  1.6G   1% /run
none                   tmpfs     5.0M     0  5.0M   0% /run/lock
none                   tmpfs     3.9G  4.0K  3.9G   1% /run/shm
cgroup                 tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda               ext3      2.7T  2.1T  595G  79% /data01
/dev/sdb               ext3      2.7T  2.3T  409G  85% /data02
/dev/sde               ext3      2.7T  2.1T  663G  76% /data03
/dev/sdd               ext3      2.7T  202M  2.7T   1% /data04
/dev/sdf               ext3      2.7T  202M  2.7T   1% /data05
/dev/sdc               ext3      2.7T  202M  2.7T   1% /data06 <--- ***Why is this not 76% full?***
/dev/sdg1              ext2      228M  118M   99M  55% /boot