dd_rhelp is a bash script that handles a very useful program written in C by
Kurt Garloff which is called dd_rescue, which roughly acts as the dd(1) command
with the characteristic to NOT stop when it falls on read/write errors.  But
using it is quite time consuming. This is where dd_rhelp come to help.

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 bad sectors. 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 (this could indeed
take really long in some cases...), 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 its job
as it depends on the log files dd_rescue creates.

Homepage:
http://www.kalysto.org/utilities/dd_rhelp/index.en.html
