# 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.

Input file and output file should be mentioned very carefully, if you mention source device in the target and vice versa, you might loss all your data.

If you give the parameter “conv=noerror” then it will continue to copy if there are read errors. If there are any errors, the above command will fail.So the exact copy of /dev/sda will be available in /dev/sdb. “if” represents inputfile, and “of” represents output file.

In this dd command example, the UNIX device name of the source hard disk is /dev/hda, and device name of the target hard disk is /dev/hdb. To backup an entire copy of a hard disk to another hard disk connected to the same system, execute the dd command as shown below. Warning: While using dd command, if you are not careful, and if you don’t know what you are doing, you will lose your data! Example 1. dd is a powerful UNIX utility, which is used by the Linux kernel makefiles to make boot images. This article provides 6 practical examples on using dd command to backup the Linux system. 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.

Dd windows iso to usb linux 6