Patent ID: 7697236

Claim:
A disk damper, comprising: an extended area ( 126 ) for providing a first wall ( 130 ) near all data tracks of a first rotating disk surface ( 220 ) and providing a second wall ( 132 ) near all data tracks of a second rotating disk surface ( 220 - 2 ), with said extended area configured to be located on an upstream side of a voice coil actuator ( 20 ) extending from an inside diameter ( 254 ) to an outside diameter ( 252 ) of said first rotating disk surface, to within a distance D ( 250 ) of said voice coil actuator; said extended area joined to a tail section ( 124 ) for providing said wall near said data tracks toward said outside diameter of said first rotating disk surface and providing said second wall near said data tracks toward said outside diameter of said second rotating disk surface, to within said distance D of said voice coil actuator; wherein said disk damper is configured to mount to a disk base in a hard disk drive at a distance D upwind from said voice coil actuator; and wherein said distance D is greater than or equal to (at least) 5 mm and is less than or equal to (at most) 21 mm.