ddrescue

# whole disk rescue

Scenario:

• The bad disk is on /dev/sdc.
• We want to recover an image to /dev/sdb, which needs to have space larger than the size of /dev/sdc. Mounted at /mnt/b

using ddrescue:

$ sudo ddrescue -r 1 -d /dev/sdc /mnt/b/c_recovered.img recover.log

• retry once if it runs into bad sectors
• log file, so we can resume after Ctrl-C
• direct access

# mounting recovery image

Download parted, use it to list the partition end bytes, then mount with:

$ mkdir /mnt/b/browse_recovered
$ sudo mount -t ext4 -o loop,offset=529387 c_recovered.img /mnt/b/browse_recovered