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1. 发明授权

US5193184A Deleted data file space release system for a dynamically mapped virtual data storage subsystem 失效
标题翻译：用于动态映射虚拟数据存储子系统的删除数据文件空间释放系统
公开(公告)号：US5193184A
公开(公告)日：1993-03-09
申请号：US540500
申请日：1990-06-18
申请人： Jay S. Belsan , George A. Rudeseal , Charles A. Milligan , Mogens H. Pedersen , John F. Kitchen , Henry S. Ludlam
发明人： Jay S. Belsan , George A. Rudeseal , Charles A. Milligan , Mogens H. Pedersen , John F. Kitchen , Henry S. Ludlam
IPC分类号： G06F3/06
CPC分类号： G06F3/0601 , G06F2003/0697
摘要： The deleted dataset space release system provides facilities in a dynamically mapped virtual memory data storage subsystem to immediately release the physical space occupied by a deleted dataset for use by the data storage subsystem to store subsequently received data files. This system also provides data security by preventing the unauthorized access to the data of scratched data files, both in cache memory and on the data storage devices. The deleted dataset space release system utilizes a user exit in the host processor data file scratch routine to transmit information to the data storage subsystem indicative of the host processor data file scratch activity. Existing channel command words are used in a manner that is transparent to the host processor. The data storage subsystem thereby immediately receives an indication that the host processor is scratching a data file from the volume table of contents of a virtual volume. The data storage subsystem can then concurrently scratch this data file from the virtual track directory contained in the data storage subsystem and thereby release the physical storage space occupied by this scratched data file.
摘要翻译：删除的数据集空间释放系统在动态映射的虚拟存储器数据存储子系统中提供设施，以立即释放被删除的数据集占用的物理空间，供数据存储子系统存储以便随后接收的数据文件。该系统还通过防止对高速缓存和数据存储设备中的划痕数据文件的数据的未经授权的访问来提供数据安全性。删除的数据集空间释放系统利用主处理器数据文件暂存例程中的用户出口将信息发送到指示主处理器数据文件划痕活动的数据存储子系统。现有的通道命令字以对主机处理器透明的方式使用。因此，数据存储子系统立即接收主机处理器从虚拟卷的内容的卷表中抓取数据文件的指示。然后，数据存储子系统可以同时从包含在数据存储子系统中的虚拟轨道目录中划破该数据文件，从而释放该划痕数据文件占用的物理存储空间。

2. 发明授权

US5155811A Read/write head buffer 失效
标题翻译： /写头缓冲区
公开(公告)号：US5155811A
公开(公告)日：1992-10-13
申请号：US304662
申请日：1989-01-31
申请人： Robert E. Dean , Steven C. Cacka , John F. Kitchen , Douglas P. Schaefer , Hossein F. Sevvom , Robert A. Brumnet
发明人： Robert E. Dean , Steven C. Cacka , John F. Kitchen , Douglas P. Schaefer , Hossein F. Sevvom , Robert A. Brumnet
IPC分类号： G06F11/10 , G06F13/362
CPC分类号： G06F13/362 , G06F11/1008
摘要： The read/write head buffer provides a buffer memory for each read/write head in the rotating media data storage system to that a seek request from the processor can be handled as soon as the beginning of the requested data record is positioned below the associated read/write head. The data image stored on the rotating media is read from the rotating media by the read/write head and stored in the read/write head buffer independent of the availability of a data communication path to the processor. Thus, the read data operation need not be synchronized with the availability of a data communication path to the processor and the requested data is retrieved from the rotating media as soon as the data record is properly positioned. In no case is the data retrieval time greater than one revolution of the rotating media. The error correction codes written on the rotating media to protect the integrity of the requested data are maintained since they are stored in the read/write head buffer along with the data record. Thus, once a data communication path is established to the processor, the control module receives the track data image from the read/write head buffer and can deformat this data from the bit serial, run length limited coding with error correction characters format of this data and convert this information to eight bit parallel data that is in an input/output record format for use by the control unit.
摘要翻译：读/写头缓冲器为旋转介质数据存储系统中的每个读/写头提供缓冲存储器，以便在所请求的数据记录的开始位于关联的读取位置之下时可以处理来自处理器的寻求请求 /写头。存储在旋转介质上的数据图像由读/写头从旋转介质中读取，并且存储在读/写头缓冲器中，独立于到处理器的数据通信路径的可用性。因此，读取数据操作不需要与处理器的数据通信路径的可用性同步，并且一旦数据记录被正确定位，就从旋转介质中检索所请求的数据。在任何情况下，数据检索时间大于旋转介质的一转。写入在旋转介质上以保护所请求数据的完整性的纠错码被保留，因为它们与数据记录一起存储在读/写头缓冲器中。因此，一旦向处理器建立了数据通信路径，则控制模块从读/写头缓冲器接收轨迹数据图像，并且可以从位串行，游程长度受限编码使该数据的格式化，该数据具有该数据的纠错字符格式并将该信息转换成输入/输出记录格式的八位并行数据，以供控制单元使用。

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