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    • 4. 发明授权
    • Roll mode for cached data storage
    • 用于缓存数据存储的滚动模式
    • US4583166A
    • 1986-04-15
    • US433599
    • 1982-10-08
    • Michael H. HartungArthur H. NoltaDavid G. Reed
    • Michael H. HartungArthur H. NoltaDavid G. Reed
    • G06F13/10G06F3/06G06F12/08G06F13/00
    • G06F12/0866
    • A so-called "roll mode" technique provides block transfer with a disk-type of direct-access data-storage device (DASD). A set of chained commands for accessing record areas enables rapidly accessing a plurality of records within a given DASD cylinder of tracks. The rotational position of the surfaces is checked. The command within the chain, irrespective of its location, having the closest logical rotational proximity to the instant rotational position of the surfaces is selected as the first command in the chain. The chain is executed beginning at the indicated rotational position selected command through the end of the chain and then wrapped to the beginning of the original chain and continuing on until the command immediately preceding the rotational position selected command has been executed.
    • 所谓的“滚动模式”技术提供了与磁盘式直接存取数据存储设备(DASD)的块传输。 用于访问记录区域的一组链接命令使得能够快速访问轨道的给定DASD气缸内的多个记录。 检查表面的旋转位置。 链中的命令,无论其位置如何,具有与表面的即时旋转位置最近的逻辑旋转接近度,作为链中的第一命令被选择。 链条从指定的旋转位置选择的指令开始,通过链条的末端执行,然后被包装到原始链条的起始处,继续进行,直到紧接在旋转位置选择命令之前的命令已被执行。
    • 7. 发明授权
    • Peripheral data storage having access controls with error recovery
    • 外设数据存储具有访​​问控制与错误恢复
    • US4638425A
    • 1987-01-20
    • US800177
    • 1985-11-20
    • Michael H. Hartung
    • Michael H. Hartung
    • G06F12/08G06F13/00
    • G06F12/0866
    • Data supplied to a data storage system by a host processor has one of two use status. A first use status is that the supplied data is to be retentively stored in the data storage system. A second use status is that the supplied data is exempted from the retentive storage requirement. An example of exempted use status is that data only temporarily stored in the data storage system, i.e. is transitory. A second example is data that is being manipulated prior to retentive storage, data that is temporarily volatile. Termination of the exempted use status results in either discard or a retentive storage of the exempted use data. Data integrity controls for the exempted use status data are described. The invention is described for a data storage hierarchy environment having a volatile cache and a magnetic recorder as a backing store. The exempted use data need be stored only in or primarily in the cache while retentive data is primarily stored in the retentive store and selectively in the cache.
    • 由主处理器提供给数据存储系统的数据具有两种使用状态之一。 第一使用状态是将所提供的数据保持存储在数据存储系统中。 第二个使用状态是提供的数据免于保持性存储要求。 豁免使用状态的示例是数据仅临时存储在数据存储系统中,即是暂时的。 第二个例子是在保持性存储之前被操纵的数据,暂时挥发的数据。 终止豁免使用状态导致免除使用数据的丢弃或保持性存储。 对豁免使用状态数据的数据完整性控制进行了说明。 对具有易失性高速缓存和磁记录器作为后备存储器的数据存储层级环境进行了描述。 豁免使用数据只能存储在缓存中或主要存储在缓存中,而保持性数据主要存储在保持性存储器中并且有选择地存储在缓存中。