Patent ID: 7265924
Filing Date: 2007-09-04
Classification: G11B

Abstract:
1. A servo writer comprising: a magnetic tape running system for running a magnetic tape, the magnetic tape running system comprising a supply reel for feeding the magnetic tape, and a take-up reel for rewinding the magnetic tape; at least one DC erase head for DC-erasing servo bands of the running magnetic tape in a first direction along a long side of the magnetic tape; a plurality of servo write heads being positioned downstream of the DC erase head in a running direction of the magnetic tape, the servo write heads for writing servo signals to the servo bands of the magnetic tape by magnetizing the servo bands in a second direction, the second direction being opposite to the first direction; an installation section on which the servo write heads are arranged, the installation section comprising a switching means for switching the servo write heads to position one of the servo write heads at a location possible to write the servo signals to the magnetic tape; and a control device for controlling switching of the servo write heads by the switching means, depending on types of the servo write heads, the control device being connected to the switching means.