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    • 5. 发明授权
    • Storage and access to scratch mounts in VTS system
    • 存储和访问VTS系统中的临时安装
    • US06226712B1
    • 2001-05-01
    • US09641804
    • 2000-08-17
    • Wayne Charles CarlsonJonathan Wayne Peake
    • Wayne Charles CarlsonJonathan Wayne Peake
    • G06F1200
    • G06F3/0613G06F3/0664G06F3/0686G06F12/0866
    • A portion of digital data records are stored on a direct access storage device (DASD) in emulation of sequential-access media when the parent digital data records are transferred to a sequential-access media. The efficiency of storage and access to the data portion is improved by random-access recall of the data in the data portion, and by constructing a data portion trailer containing various statistics about the records for referencing the digital data and advancing to target data. The volume data portion trailer is constructed as read forward and forward space block operations are performed. Data is preferably stored in logically assembled records. Interspersed with the records, there may be one or more marker codes, which function like tape marks among the various data records. The volume trailer may contain pointers to each record, a record count and marker codes for the data portion. Statistics contained in the data portion trailer enable substantially more efficient access of the data by a DASD.
    • 当父数字数据记录被传送到顺序存取介质时,一部分数字数据记录被存储在直接访问存储设备(DASD)中,以模拟顺序存取介质。 通过对数据部分中的数据进行随机访问调用,并通过构建包含关于用于引用数字数据并推进到目标数据的记录的各种统计信息的数据部分预告片来提高对数据部分的存储和访问的效率。 音量数据部分预告片被构造为读取前进,并且执行前向空间块操作。 数据优选地存储在逻辑组装的记录中。 插入记录,可能有一个或多个标记代码,其功能类似于各种数据记录中的磁带标记。 音量预告片可以包含每个记录的指针,数据部分的记录计数和标记代码。 包含在数据部分预告片中的统计数据使DASD能够显着更有效地访问数据。