Refer our earlier article How to view initrd.image for more details. The above creates the image of a harddisk /dev/hda. This method is typically faster than other types of backups, enabling you to quickly restore data following an unexpected catastrophe. Instead of taking a backup of the hard disk, you can create an image file of the hard disk and save it in other storage devices.There are many advantages to backing up your data to a disk image, one being the ease of use. # dd if=/dev/sda of=/dev/sdb conv=noerror,sync Example 2. In the copy of hard drive to hard drive using dd command given below, sync option allows you to copy everything using synchronized I/O.
There are several ways to backup a Linux system, including rsync and rsnapshot that we discussed a while back. I’ve seen cases where sysadmins learned this in the hard way. At the very least, critical data loss will have a financial impact on companies of all sizes.