Abstract: A method for writing a final track positioning servo code into a servo code signal region of a set of disks of a magnetic disk drive. the method includes writing a first temporary servo code in an opened loop manner into a first position in the set of disks, writing an Nth temporary servo code in a closed loop manner into an Nth position in the set of disks, writing an (N+1)th temporary servo code in the closed loop manner into an (N+1)th position in the set of disks, repeating the previous steps until the final servo code which has an even spacing and is recorded regularly is obtained and then writing the final servo code into the servo code signal region.

Abstract: A laser scanning system is provided to include a laser scanning component for generating a laser beam; a pivotable reflecting mirror disposed for receiving and reflecting the laser beam generated by the laser scanning component, and adapted to be driven to pivot between a first position and a second position; a light sensitive drum arranged and configured such that it may receive the laser beam reflected by the reflecting mirror in the first position and it will carry out an image print-out outputting operation by electro-photography technology; a document scanning region adapted to allow an image of a document to be input, and being arranged and configured such that it may allow the document to be scanned by the laser beam reflected to the region by the reflecting mirror in the second position and it may reflect the laser light returned from the document to the laser scanning component; and returned laser light splitting and detecting component disposed in the laser scanning component, for splitting the retu

Abstract: The chargeable working light of the present invention utilizes an electrical circuit to achieve the functions of charging a storage battery from a power source, and of alternatively supplying power to a lighting element from the power source and the battery simultaneously. In addition, the structure of the chargeable working light gives facilities for being adjusted to properly provide illumination from a desired place and direction.