Today i would like to give you an idea of what to do if you delete some files by accident. I am pretty sure this happened to you. The only way to be protected from accidentally deletion of files is that you don’t work with a computer 
This makes dd_rescue the best tool for recovering hard drive having bad sectors.In short, it’ll use dd_rescue on your entire disc, but will try to gather the maximum valid data before trying for ages on badsectors. So if you leave dd_rhelp work for infinite time, it’ll have the same effect as a simple dd_rescue. But because you might not have this infinite time , dd_rhelp will jump over bad sectors and rescue valid data. In the long run, it’ll parse all your device with dd_rescue.
You can Ctrl-C it whenever you want, and rerun-it at will, it’ll resume it’s job as it depends on the log files dd_rescue creates.In addition, progress will be shown in a ASCII picture of your device beeing rescued.
Why use dd_rhelp and not dd_rescue ?
Regardless of which hard drive brand you own, it is just a matter of time before you will need data recovery. Whether it is due to mechanical failure or otherwise, hard drive data recovery for laptops, single hard drive servers, and RAID servers are required for a variety of reasons:
