I have a WD My Passport 0740 500GB external HD that stopped working just 2-3 months after I started using it. And it filled to the brim, too. I tried taking it to the local IT store to recover the data, but no luck. ( PS, they opened the casing, so warranty is void).The light on the HD turns on. The Hard Drive is recognized. But it does not show up on Windows Explorer (windows 7 Ultimate). I've read a number of forum posts regarding the issue and checked that:
a) the HD does not show up in that BIOS.
b) when I open disk management, the HD does show up as disk1, but with no bar.
At this point i've given up on recovering the data. But if the HD proves salvagable in any way, I'd be gratefull.
CCleaner from piriform.com is worth a shot. Download it run the drive wipe on it but tell it to only wipe the free space which i realized may not be much but again, its worth a try. If that's a no-go, then i would just tell it to wipe the entire drive, sure you'd lose the info on it but it might save the drive.
The Hard Disk doesn't show up in 'My Computer' to begin with!
Also, I tried turning on the computer with the HD plugged in, then opened Disk Management. It asked to select Partition type for Disk 1. But on selecting both cases, MBR and GPT (one at a time), I got the same error message:
'The request could not be performed because of an I/O device error.'
UVCView is correctly detecting the USB-SATA bridge IC on the drive, but the drive behind the bridge has a physical problem. I presume that Hard Disk Sentinel is reporting the model number of the drive, eg WD5000BMVV.