99% of hard drives use a fluid bearing to support the platters. Read:
QUOTE
They are frequently used in high load, high speed or high precision applications where ordinary ball bearings have short life or high noise and vibration. They are also used increasingly to reduce cost. For example, hard disk drive motor fluid bearings are both quieter and cheaper than the ball bearings they replace.
Now read this, paying attention to what has been bolded:
QUOTE
Fluid bearings are typically quieter and smoother (more consistent friction) than mechanical bearings. For example, hard disks manufactured with fluid bearings have noise ratings for bearings/motors on the order of 20-24 dB, which is a little more than the background noise of a quiet room. Drives based on rolling-element bearings are typically at least 4 dB noisier.
4dB is nearly nothing. If your hard drive is whining or making a loud noise, its time for a new drive. This indicates a problem with the drive that cant be fixed by simply oiling a bearing (which isnt even possible with fluid bearings).
This post has been edited by AfterTheInsanity: Mar 14 2007, 07:00 PM