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    • 22. 发明授权
    • Disk control method and apparatus
    • 磁盘控制方法和装置
    • US5797022A
    • 1998-08-18
    • US684026
    • 1996-07-19
    • Susumu ShimotonoTomohiro MiyahiraAkihiro Nakao
    • Susumu ShimotonoTomohiro MiyahiraAkihiro Nakao
    • G06F1/32G06F3/06G06F12/08G06F1/26
    • G06F12/0804G06F1/32G06F12/0866
    • A method and apparatus for controlling a hard disk drive in a computer system is disclosed. The method and apparatus reduce the hard disk's power consumption, enhance the performance of the computer system incorporating the hard disk, and maintain data consistency. The computer system has a cache and controls the power consumption of the local hard disk drive. A cache flush writes data from the cache to the disk. Disk accesses are detected. If no disk accesses were detected, the cache is flushed after a first predetermined period of time (T2) has elapsed since the last flush. If a disk has been accessed, the cache is flushed after a second predetermined period of time (T3 or T4) has elapsed since the last disk access. Even if the predetermined period of time (T3 or T4) since the last disk access has not elapsed, if disk access were detected, the cache is flushed after a predetermined number of disk accesses.
    • 公开了一种用于控制计算机系统中的硬盘驱动器的方法和设备。 该方法和设备降低了硬盘的功耗,增强了包含硬盘的计算机系统的性能,并保持了数据的一致性。 计算机系统具有缓存并控制本地硬盘驱动器的功耗。 缓存刷新将数据从缓存写入磁盘。 检测到磁盘访问。 如果没有检测到磁盘访问,则在从上次刷新起经过了第一预定时间段(T2)之后,高速缓冲存储器被刷新。 如果已经访问了磁盘,则在从上次磁盘访问起经过了第二预定时间段(T3或T4)之后,高速缓冲存储器被刷新。 即使从上一次磁盘访问以来的预定时间段(T3或T4)没有经过,如果检测到磁盘访问,则在预定数量的磁盘访问之后,缓存被刷新。