Servo Track Writing Technology
نویسندگان
چکیده
To increase the recording density of hard disk drives (HDDs), it is indispensable to improve the servo track writing (STW) technology that writes the servo positioning information used to position the magnetic recording head onto the data track. Previously, it was popular to write the servo tracks by using the HDD’s own head and positioning it using an external actuator. Recently, however, the demand for higher productivity and STW quality has been growing, and a new method is needed. As a manufacturer of HDDs, Fujitsu is developing various STW technologies to meet this need. This paper introduces the major STW methods and requirements for STW and then describes the factors that reduce STW quality. Then, it describes media STW and magnetic printing STW, which are typical external writing methods.
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