发明公开
- 专利标题： Handling of media defects of mass storage discs
- 专利标题（中）： 在板状的大容量存储的缺陷的治疗。
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申请号： EP85106832.0申请日： 1985-06-03
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公开(公告)号： EP0167806A1公开(公告)日： 1986-01-15
- 发明人: Rathbun, Donald J. , Tarbox, Bruce H. , Su, Taian
- 申请人： Honeywell Bull Inc.
- 申请人地址： 3800 W. 80th Street Minneapolis Minnesota 55431 US
- 专利权人： Honeywell Bull Inc.
- 当前专利权人： Honeywell Bull Inc.
- 当前专利权人地址： 3800 W. 80th Street Minneapolis Minnesota 55431 US
- 代理机构： Bardehle, Heinz, Dipl.-Ing.
- 优先权： US618640 19840608
- 主分类号： G11B5/09
- IPC分类号： G11B5/09
摘要：
A disk drive of a mass storage subsystem includes areas on a disk surface wherein a vendor-generated defective sector log, a software-generated defective sector log and an alternate sector log are stored. A random access memory (RAM) stores a copy of the defective sector logs. During a seek operation, firmware tests the defective sector logs in RAM to generate the alternate sector log for that cylinder number. During the read or write operation, the alternate sector log is checked before processing the sector to determine if it is a defective sector. If the sector is defective, the head is positioned to another cylinder at a head and sector address read from the alternate sector log.
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