I used SpeedFan to check the SMART values, because its what I have installed. I've actually never had a problem with this drive, even though it is the oldest one in my system. It was once used as a system drive, so I've gotten some good years out of it. The newer WD5000 500GB started to have bad sectors already, but this WD2000 didn't.
Here's a link to the SMART analysis of the drive:
Attribute Current Raw
Raw Read Error Rate 200 000000000000
Spin Up Time 206 000000000898
Start/Stop Count 98 000000000872
Reallocated Sector Count 200 000000000000
Seek Error Rate 200 000000000000
Power On Hours Count 8 0000000107BB
Spin Retry Count 100 000000000000
Calibration Retry Count 100 000000000000
Power Cycle Count 99 0000000005DC
Reallocated Event Count 200 000000000000
Current Pending Sector 200 000000000000
Offline Uncorrectable Sector # 200 000000000000
Ultra DMA CRC Error Rate 200 000000000006
Write Error Rate 200 000000000000
All the attributes of your hard disk are above the S.M.A.R.T. thresholds set by the manufacturer. This is good.
NOTE : your hard disk Power On Hours Count attribute current value (8) is below the normal range (74 - 99) reported for your specific hard disk model. Basically your hard disk was powered on for more than the maximum time the average user did. This means that either all of the reports collected are from hard disks that were not powered on for too long (this is realistic for recent models) or that your hard disk is becoming old. Usually this is not considered as a pre-failure advisory, but you should check whether you want to replace the hardware or keep an eye on its performances over time.
The overall fitness for this drive is 100%.
The overall performance for this drive is 100%.
I managed to copy all 160GB off it just fine, using TeraCopy so that it could perform a CRC check on each individual file copied, and every single file's CRC checked out. So that means that I was able to read the entire drive just fine, although it doesn't mean none of the data is corrupted.
But I just tested it out again, to see if maybe the fact that I just moved the head over the entire drive will have made any difference. In 'performance' mode, I can read from it at 30mB/s, and there are no clicking noises. But if I switch to 'balanced' mode, the copy speed instantly drops to ~5mB/s, although the clicking doesn't start until 1 or 2 minutes later. Same with 'power saver' mode, there is absolutely no difference (in terms of this drive's performance) between 'power saver' and 'balanced'.
It puts less power to everything connected to the motherboard. Backup everything and RMA it or get a new drive. Clicking is never a good thing.
Where did you hear that it puts less power to everything? I'm not saying you're wrong, I'm just curious, and I would like to be sure. I know it lowers the CPU clock speed and voltage, if you have AMD Cool 'n' Quiet or whatever the Intel equivalent is. I know it can reduce power to things like USB devices, PCIE cards, and wireless cards. And I know it can change how long it takes for the HD to idle and turn off. But all these settings are configurable and visible in the Windows Power Scheme dialog. The only option under 'hard drive' is the idle timeout.