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    • 9. 发明授权
    • Method for identifying the write protect status of a diskette
    • 识别软盘写保护状态的方法
    • US06904495B2
    • 2005-06-07
    • US10043478
    • 2002-01-10
    • Christopher J. FrantzE. David Neufeld
    • Christopher J. FrantzE. David Neufeld
    • G06F3/06G06F21/80G06F12/00
    • G06F21/80G06F3/0601G06F2003/0697
    • A technique is provided for identifying the write protect status of a removable storage media, such as a computer diskette, prior to normal interaction with the media. The present technique interacts with the removable storage media and identifies the write protect status as write protected if the interaction produces a failure code indicative of write protection. For example, data storage may be attempted at a non-storage location, thereby producing a write protect error if the media is write protected or an invalid write error if the media is not write protected. Alternatively, the present technique may attempt to read and rewrite data back to the media, thereby producing the write protect error if the media is write protected.
    • 提供了一种在与介质正常交互之前识别可移动存储介质(例如计算机磁盘)的写保护状态的技术。 本技术与可移动存储介质相互作用,如果交互产生指示写保护的故障代码,则将写保护状态识别为写保护状态。 例如,可以在非存储位置尝试数据存储,从而如果介质是写保护的,则产生写保护错误,或者如果介质不被写保护,则产生无效的写入错误。 或者,本技术可以尝试将数据读取和重写回介质,从而如果介质被写保护,则产生写保护错误。
    • 10. 发明授权
    • Fast disk cache writing system
    • 快速磁盘缓存写入系统
    • US06795894B1
    • 2004-09-21
    • US09634055
    • 2000-08-08
    • E. David NeufeldChristopher J. Frantz
    • E. David NeufeldChristopher J. Frantz
    • G06F1200
    • G06F12/0866
    • A disk cache writing system that substantially improves disk drive caching. A cache disk drive, or a reserved portion of a standard disk drive, is provided that is dedicated to cache data. Any of the current data of the disk drive or cache portion is temporary cache data that may be overwritten at any time. Cache data is written to a write section, including one or more sequential sectors, where the write section has a minimal write access time. The write section begins at a first offset sector associated with a minimal write access time, or at any one of several potential start sectors including the first offset sector. One or more potential start sectors are determined, where each corresponds with a first start sector in a current track to avoid moving the R/W heads from the current track. The only initial delay that is encountered is the delay to switch the R/W heads from read to write. The potential start sectors are aligned within the same current cylinder of the disk drive since all the R/W heads are aligned. The only other delay(s) that may be encountered are the characteristic delays associated with writing to sequential sectors of the chosen disk drive that are otherwise unavoidable, such as delays associated with switching sequential tracks, heads, surfaces, platters, etc.
    • 磁盘缓存写入系统,大大改善磁盘驱动器缓存。 提供专用于高速缓存数据的高速缓存磁盘驱动器或标准磁盘驱动器的保留部分。 磁盘驱动器或高速缓存部分的任何当前数据是可以随时被覆盖的临时高速缓存数据。 缓存数据被写入写入部分,包括一个或多个顺序扇区,其中写入部分具有最小的写入访问时间。 写部分开始于与最小写访问时间相关联的第一偏移扇区,或者包括第一偏移扇区的几个潜在起始扇区中的任一个。 确定一个或多个潜在的起始扇区,其中每个对应于当前轨道中的第一起始扇区,以避免将R / W头从当前轨道移动。 遇到的唯一的初始延迟是将R / W头从读取切换到写入的延迟。 由于所有R / W磁头对齐,所以可能的起始扇区在磁盘驱动器的同一当前磁道内对齐。 可能遇到的唯一其他延迟是与所选磁盘驱动器的顺序扇区相关联的特征延迟,否则不可避免,例如与切换顺序轨道,磁头,表面,拼盘等相关联的延迟。