Create an image your disk using DD

Create disk image Boot from a live media. Make sure no partitions are mounted from the source hard drive. Mount the external HDD Backup the drive. dd if=/dev/sdX conv=sync,noerror bs=64K | gzip -c > /path/to/backup.img.gz If necessary (e.g. when the format of the external HD is FAT32) split the disk image in volumes (see also the split man pages). dd if=/dev/sdX conv=sync,noerror bs=64K | gzip -c | split -a3 -b2G - /path/to/backup. [Read More]