Magnetic disk driving device

Abstract

Abstract PURPOSE:To obtain a magnetic disk driving device in which the possibility of accidental erasure is precluded even with mis-track by using a track identification signal written in a recording track so as to identify the recording track and a servo track at formatting. CONSTITUTION:Whether or not a track is a track subjected to formatting is discriminated by detecting the presence of a track identification signal P and the formatting is executed only when the track identification signal P is detected. That is, a signal detected by a magnetic head 2 is amplified via a head amplifier 21 and a band pass filter 40, an envelope detector 43 and a comparator 41 discriminate the track identification signal P. When the track identification signal P is confirmed, a format enable signal is sent from a detection circuit 42 to a driving circuit 22 to apply formatting. Thus, even if a magnetic head 2 steps out in mistake, since servo tracks ST1-ST4 are not formatted, the possibility of erasure of a servo signal F is precluded.

Inventors

• 👤 Toru Tsuyoguchi
• 👤 強口　通
• 👤 Toru Kaneko
• 👤 徹 金子
• 👤 Tetsuya Mitsuishi
• 👤 三石　哲也
• 👤 Isao Asano
• 👤 功 浅野
• 👤 Hiroshi Yoshida
• 👤 宏志 吉田
• 👤 Tomoo Iiizumi
• 👤 飯泉　知男

Bibliographic Details