My drive is not recognized by HDD LLFT!!!

[bigshot99]

I own a WD 750GB drive as a backup drive for my data. Recently the MBR of the drive and partition table were messed up and my drive is not recognized by the OS (Win & Ultimate x64) anymore. I'm using HDD LLFT to reformat the drive as I have already backed up all my files and folders to try to restore the drive to its working condition, if that helps.

HDD LLFT reports this:

"Current date and time: 7/22/2014 1:48:18 PM
HDD Low Level Format Tool 4.40; http://hddguru.com
Device details for [1] WDC WD75 01AALS-00E3A 05.0 [750.15 GB] (1465149168 512-byte sectors)

Details are unavailable: Internal error.
Please post this problem on http://forum.hddguru.com"

According to this log, may it be that my HDD is defective (hardware issue)? Should I consider to RMA this drive if the warning is smth. serious?
Please, I need some opinion/advice on this issue, and how to fix it.
Thank you

[fzabkar]

If Western Digital's Data LifeGuard (DOS version) utility fails your drive, then I would replace it.

[data-medics]

You are running the program as an administrator right??? (I would assume it only runs that way)

If not windows could be blocking your from wiping the partition table.

[data-medics]

Try a program like Active KillDisk. If you can run a zero fill pass, the drive is good. If it fails, RMA it.

[hhddrec]

+ data-medics.

Active KillDisk is a good way to know if drive is badly