how to recover data from bad sector hard disk with terminal

[galaxy]

My segate 640gb ST9640322AS HAS MANY BAD SECTOR THERE IS NO CLICKING AND NOISE HARD DISK IS DETECT IN BIOS AND SHOW DATA BUT DATA IS NOT COPY FOR ANOTHER DRIVE PLZ GIVE ME FAST RESULT

[digitalferret]

http://en.wikipedia.org/wiki/Ddrescue

[lcoughey]

No noise and detection doesn't necessarily mean that all the heads are reading. Try ddrescue, but if it runs into lots of read errors, you should seek professional assistance while there is still a chance that they can recover your files.

[galaxy]

can u provide this software link

[galaxy]

plz give me terminal command ? and i use str4.0

[lcoughey]

can u provide this software link

If you have to ask, you are over your head.

[DRforensic]

Try to clone the drive with HD CLONE version 4 or free software you can run in windows called DMDE. You might get your bad sectors read.