公开(公告)号：US5119291A

公开(公告)日：1992-06-02

申请号：US517287

申请日：1990-05-01

申请人： William J. Flannagan ,  Ronald M. Kern ,  John E. Kulakowski ,  Robert E. Wagner

发明人： William J. Flannagan ,  Ronald M. Kern ,  John E. Kulakowski ,  Robert E. Wagner

IPC分类号： G06F3/06 ,  G06F17/30 ,  G11B7/007 ,  G11B20/12 ,  G11B20/18 ,  G11B27/28 ,  G11B27/32

CPC分类号： G06F17/30955 ,  G06F3/0601 ,  G11B20/1252 ,  G11B20/1883 ,  G11B27/28 ,  G11B27/329 ,  G11B7/00745 ,  G06F2003/0697 ,  G11B2020/10907 ,  G11B2220/20 ,  G11B2220/218 ,  G11B2220/2537

摘要： An updatable and expandable directory structure and resultant access procedures emulating a write-once or indelible record medium to a rewriteable record medium as to accessing characteristics. The directory is indexed; one directory header for a first set of files indexes another set of files. Sector clusters or data extends are managed such that random recording from any file proceeds independently of write-once characteristics. The directory is stored on the medium as data is recorded. Each directory entry contains an archival history of recording of a related data file in the medium. Both logical and physical addressing is employable.

摘要翻译： 可更新和扩展的目录结构和结果访问过程，模拟一次写入或不可擦除的记录介质到可重写记录介质以访问特性。 索引目录; 一个目录头为第一组文件索引另一组文件。 管理扇区集群或数据扩展，使得来自任何文件的随机记录独立于一次写入特性进行。 当记录数据时，该目录存储在介质上。 每个目录条目包含在介质中记录相关数据文件的存档历史。 逻辑和物理寻址都可以使用。

公开(公告)号：US4837680A

公开(公告)日：1989-06-06

申请号：US90722

申请日：1987-08-28

申请人： Robert N. Crockett ,  Robert F. Kern ,  Arnold G. Miller ,  Richard E. Norris ,  Michael W. Pousson, Jr. ,  Robert E. Wagner

发明人： Robert N. Crockett ,  Robert F. Kern ,  Arnold G. Miller ,  Richard E. Norris ,  Michael W. Pousson, Jr. ,  Robert E. Wagner

IPC分类号： G06F13/14 ,  G06F11/20 ,  G06F13/10 ,  G06F13/12 ,  G06F15/16 ,  G06F15/177

CPC分类号： G06F11/201 ,  G06F13/126

摘要： A plurality of host processors share access to a peripheral data storage subsystem and each have program means for controlling asynchronous operations of the subsystem. Control blocks in each of the host processors are addressably linked together for enabling inferred access to a unit control block (UCB) for any of a plurality of peripheral devices in the subsystem. The subsystem selectively groups some of the devices such that only devices designated as primary devices are addressably accessible by host processor application programs. Other devices in the respective groups are secondary devices and are accessed by the subsystem whenever the primary devices in the same group cannot perform a host processor commanded operation. Means are provided for identifying the secondary devices to all of the host processors.