Invention Grant
- Patent Title: Magnetic disk storage apparatus and method for controlling magnetic disk storage apparatus
- Patent Title (中): 磁盘存储装置及磁盘存储装置的控制方法
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Application No.: US10142988Application Date: 2002-05-13
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Publication No.: US06937429B2Publication Date: 2005-08-30
- Inventor: Kenji Yoshida , Hiroshi Satou , Kenji Nishimura
- Applicant: Kenji Yoshida , Hiroshi Satou , Kenji Nishimura
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: Hitachi ULSI Systems Co., Ltd.,Renesas Technology Corporation
- Current Assignee: Hitachi ULSI Systems Co., Ltd.,Renesas Technology Corporation
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Reed Smith LLP
- Agent Stanley P. Fisher, Esq.; Juan Carlos A. Marquez, Esq.
- Priority: JP2001-153907 20010523
- Main IPC: G11B5/54
- IPC: G11B5/54 ; G11B21/12 ; G11B5/596
Abstract:
In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a voice coil motor for moving a magnetic head when power a supply is stopped, and a brake controller that judges a movement speed of the magnetic head from the detected back electromotive forces, and brakes the voice coil motor when the movement speed is greater than a preset first limited speed.
Public/Granted literature
- US20020176202A1 Magnetic disk storage apparatus and method for controlling magnetic disk storage apparatus Public/Granted day:2002-11-28
Information query
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