External HDD((Transcend)) problem

Hi All,

My External hard disk is not opening. At first, it seeks a format. But, after trying to format it says, windows failed to format.

The error at the event viewer is as follows:
err1: The device, \Device\Harddisk2\DR2, has a bad block
err2: The driver detected a controller error on \Device\Harddisk2\DR2.

After googling with the problem, I found a suggestion to apply the command "chkdsk x: /f". While running the "chkdsk" command, at the 3 of 3 stage (CHKDSK is verifying the security descriptors) it shows one line consecutively and that is
"Correcting errors in the volume Bitmap" -
................................................................
................................................................
"Correcting errors in the volume Bitmap"

The scenario at the disk management is:
1. Disk is "Online"
2. Type "RAW"
3. Active and Healthy

I don't need the data. I just want to get the HDD alive. Please advice what can I do.