Patent ID: 7489601

Claim:
A disk drive comprising: a base chassis; a disk rotation drive including a disk table disposed on the base chassis to hold a disk-shaped recording medium and a spindle motor coupled to the disk table to rotate the disk-shaped recording medium; a first optical pickup mechanism including a first optical pickup unit disposed on the base chassis to only read information signals recorded in a first disk-shaped recording medium of a first type set on the disk table, and a first pickup moving mechanism that moves the first optical pickup unit in a direction radial to the first disk-shaped recording medium; a second optical pickup mechanism including a second optical pickup unit disposed opposite to the first optical pickup mechanism to write information signals to and read information signals from a second disk-shaped recording medium of a second type set on the disk table, and a second pickup moving mechanism that moves the second optical pickup unit in a direction radial to the second disk-shaped recording medium; a skew detecting means for detecting an inclination of an optical axis of light emitted from the second optical pickup unit in relation to the second disk-shaped recording medium; and a skew adjusting means for adjusting a skew of the second optical pickup unit writing or reading information signals to or from the second disk-shaped recording medium by adjusting an inclination of the second optical pickup unit correspondingly to the optical axis inclination detected by the skew detecting means.