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    • 1. 发明授权
    • Method and system for concurrent access during backup copying of data
    • 在备份数据复制期间并发访问的方法和系统
    • US5379398A
    • 1995-01-03
    • US871247
    • 1992-04-20
    • Oded CohnMichael H. HartungJohn N. McCauley, Jr.William F. MickaClaus W. MikkelsenKenneth M. NaginYoram NovickAlexander Winokur
    • Oded CohnMichael H. HartungJohn N. McCauley, Jr.William F. MickaClaus W. MikkelsenKenneth M. NaginYoram NovickAlexander Winokur
    • G06F12/00G06F11/14G06F12/02G06F12/16
    • G06F11/1466
    • A method and system are disclosed for permitting high concurrency of access during backup copying of designated data stored within a storage subsystem which includes multiple storage devices coupled to the data processing system via a storage subsystem control unit having subsystem memory therein. Data within each storage device is accessed utilizing a Unique Control Block (UCB), which identifies a selected storage device, and an associated data retrieval command sequence which identifies the data to be accessed. Portions of the data copied to subsystem memory within the subsystem storage control unit as sidefiles from a first storage device may be accessed utilizing a Unique Control Block (UCB) associated with an alternate storage device by associating a selected data retrieval command sequence therewith which identifies the data as stored within the subsystem memory. In this manner, data from a first storage device may be accessed utilizing an alternate Unique Control Block (UCB), permitting concurrent access of data utilizing the Unique Control Block (UCB) associated with the first storage device.
    • 公开了一种方法和系统,用于在备份复制存储在存储子系统内的指定数据的同时进行访问的高并发性,该存储子系统包括经由其中具有子系统存储器的存储子系统控制单元耦合到数据处理系统的多个存储设备。 使用识别所选存储设备的唯一控制块(UCB)和识别要访问的数据的相关联的数据检索命令序列来访问每个存储设备内的数据。 可以利用与替代存储设备相关联的唯一控制块(UCB)来访问从子系统存储控制单元中复制到子系统存储控制单元中的子系统存储器的部分作为来自第一存储设备的副文件,通过将所选择的数据检索命令序列与其相关联来识别标识 存储在子系统存储器中的数据。 以这种方式,可以使用替代的唯一控制块(UCB)来访问来自第一存储设备的数据,允许使用与第一存储设备相关联的唯一控制块(UCB)并行访问数据。
    • 5. 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。