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1.发明授权Incremental disk backup system for a dynamically mapped data storage subsystem 失效用于动态映射的数据存储子系统的增量磁盘备份系统
公开(公告)号：US5210866A
公开(公告)日：1993-05-11
申请号：US582260
申请日：1990-09-12
CPC分类号： G06F11/1451 , G06F2201/815
摘要： The parallel disk drive array data storage subsystem dynamically maps between virtual and physical data storage devices and schedules the writing of data to these devices. The data storage subsystem functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each containing N+M disk drives. The data storage subsystem does not modify data stored in a redundancy group but simply writes the modified data as a new record in available memory space on another redundancy group. The original data is flagged as obsolete. A mapping table is maintained to identify portions of these redundancy groups which contain newly written or modified virtual track instances. These marked virtual track instances are written to backup medium as a background process and the mapping table is updated to clear the flags that identify these virtual track instances as having been modified.
摘要翻译： 并行磁盘驱动器阵列数据存储子系统在虚拟和物理数据存储设备之间动态映射，并安排将数据写入这些设备。 数据存储子系统作为传统的大尺寸磁盘驱动器存储器，使用冗余组阵列，每个冗余组包含N + M个磁盘驱动器。 数据存储子系统不修改存储在冗余组中的数据，而只是将修改后的数据作为新记录写入另一个冗余组的可用存储空间。 原始数据被标记为过时。 维护映射表以识别包含新写入或修改的虚拟磁道实例的这些冗余组的部分。 这些标记的虚拟轨道实例作为后台进程写入备份介质，并且更新映射表以将标识这些虚拟轨道实例的标志清除为已修改。
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2.发明授权Dynamically mapped data storage subsystem having multiple open destage cylinders and method of managing that subsystem 失效动态映射的数据存储子系统具有多个开放的流动缸和管理该子系统的方法
公开(公告)号：US5581724A
公开(公告)日：1996-12-03
申请号：US439665
申请日：1995-05-12
CPC分类号： G06F12/0804 , G06F11/1076 , G06F12/0866 , G06F2211/1009 , G06F2212/312
摘要： A data storage subsystem dynamically maps a virtual data storage device image presented to associated processors to physical data storage devices used to implement the data storage subsystem. Multiple destage memory elements are concurrently active to increase an aggregate destage data transfer rate and to allow data to be stored on various memory elements appropriate to the type of data contained in each stored virtual object. An open logical cylinder list is used to maintain data integrity among multiple open destage memory elements. Memory elements are also selected to function as archive memory. The data storage subsystem includes a plurality of data storage elements configured into at least two redundancy groups, each redundancy group including n+m of the data storage elements, and a cache memory connected to the redundancy groups and a host processor interface. The data storage subsystem stores data indicative of the amount of available memory space on each of the open logical cylinders and little used data records are migrated or transferred from other memory elements to the archive memory elements to maintain sufficient available memory space.
摘要翻译： 数据存储子系统将呈现的虚拟数据存储设备图像动态地映射到用于实现数据存储子系统的物理数据存储设备。 多个目的地存储器元件同时有效以增加聚合的返回数据传输速率，并允许将数据存储在适合于每个存储的虚拟对象中包含的数据类型的各种存储器元件上。 一个开放的逻辑圆柱体列表用于维护多个开放的运输存储元件之间的数据完整性。 内存元素也被选择用作存档内存。 数据存储子系统包括配置成至少两个冗余组的多个数据存储元件，每个冗余组包括数据存储元件的n + m，以及连接到冗余组的高速缓冲存储器和主机处理器接口。 数据存储子系统存储指示每个开放逻辑圆柱体上的可用存储器空间量的数据，并且少量使用的数据记录从其它存储器元件迁移或传送到归档存储器元件以维持足够的可用存储器空间。
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3.发明授权
公开(公告)号：US5410667A
公开(公告)日：1995-04-25
申请号：US870573
申请日：1992-04-17
CPC分类号： G06F11/201 , G06F3/0601 , G06F2003/0697 , Y10S707/99953 , Y10S707/99956
摘要： The disk drive array data storage subsystem maps between virtual and physical data storage devices and schedules the writing of data to these devices. The data storage subsystem functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each containing N+M disk drives. This system copies data records by simply creating a duplicate data record pointer in a virtual track directory to reference the original data record. This enables the host processor to access the data record via two virtual addresses while only a single physical copy of the data record resides in the data storage subsystem.
摘要翻译： 磁盘驱动器阵列数据存储子系统映射虚拟和物理数据存储设备之间，并将数据写入这些设备。 数据存储子系统作为传统的大尺寸磁盘驱动器存储器，使用冗余组阵列，每个冗余组包含N + M个磁盘驱动器。 该系统通过简单地在虚拟轨道目录中创建重复数据记录指针来引用原始数据记录来复制数据记录。 这使得主处理器能够经由两个虚拟地址访问数据记录，而数据记录的单个物理副本驻留在数据存储子系统中。
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4.发明授权Deleted data file space release system for a dynamically mapped virtual data storage subsystem 失效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。
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5.发明授权Phantom duplex copy group apparatus for a disk drive array data storge subsystem 失效用于磁盘驱动器阵列数据存储子系统的PHANTOM DUPLEX COPY GROUP
公开(公告)号：US5239659A
公开(公告)日：1993-08-24
申请号：US717820
申请日：1991-06-19
CPC分类号： G06F11/1076 , G06F11/1008 , G06F3/0601 , G11B20/1833 , G11C29/74 , G11C29/88 , G06F11/2005 , G06F11/2087 , G06F11/2094 , G06F2003/0692 , G06F2201/815
摘要： This apparatus makes use of a disk drive array to store data records for an associated host processor. This disk drive array emulates the operation of a large form factor disk drive by using a plurality of interconnected small form factor disk drives. These small form factor disk drives are configured into redundancy groups, each of which contains n+m disk drives for storing data records and redundancy information thereon. The use of this configuration is significantly more reliable than a large form factor disk drive. However, in order to maintain compatibility with host processors that request the duplex copy group feature, the phantom duplex copy group apparatus of the present invention mimics the creation of a duplex copy group in this dynamically mapped data storage subsystem using a disk array and a phantom set of pointers that mimic the data storage devices on which the data records are stored.
摘要翻译： 该装置利用磁盘驱动器阵列来存储关联的主机处理器的数据记录。 该磁盘驱动器阵列通过使用多个互连的小型磁盘驱动器来模拟大型磁盘驱动器的操作。 这些小尺寸磁盘驱动器被配置为冗余组，每个冗余组包含n + m个磁盘驱动器，用于存储数据记录和冗余信息。 使用这种配置比大型磁盘驱动器显着更可靠。 然而，为了保持与请求双工复制组特征的主机处理器的兼容性，本发明的虚拟双工复制组装置使用磁盘阵列和幻影模拟在该动态映射的数据存储子系统中创建双工复制组 一组模拟存储数据记录的数据存储设备的指针。
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公开(公告)号：US5632012A
公开(公告)日：1997-05-20
申请号：US611501
申请日：1996-03-06
CPC分类号： G06F11/1076 , G11B20/18 , G11B20/1833 , G06F2211/1088
摘要： One or more background processes that references data storage volumes and cylinders that are to be scrubbed to ensure the integrity of the data stored thereon. A priority scrubbing process is also available to note data storage volumes that have recently had data written thereon by the host processor and which require a more timely review of the data than less frequently used volumes.
摘要翻译： 引用要擦除的数据存储卷和柱面的一个或多个后台进程，以确保其上存储的数据的完整性。 优先擦洗过程也可用于记录最近由主机处理器写入数据的数据存储卷，并且需要比较少使用的卷更及时地检查数据。
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公开(公告)号：US5403639A
公开(公告)日：1995-04-04
申请号：US939312
申请日：1992-09-02
申请人： Jay S. Belsan , Jeffrey S. Laughlin , Mogens H. Pedersen , Robert J. Raicer , George A. Rudeseal , Charles P. Schafer , Barbara L. Steele , Patrick J. Tomsula
发明人： Jay S. Belsan , Jeffrey S. Laughlin , Mogens H. Pedersen , Robert J. Raicer , George A. Rudeseal , Charles P. Schafer , Barbara L. Steele , Patrick J. Tomsula
CPC分类号： G06F17/30067 , Y10S707/99953 , Y10S707/99955
摘要： This file server system appears to the host computer to be a plurality of data storage devices which are directly addressable by the host computer using the native data management and access structures of the host computer. The file server however is an intelligent data storage subsystem that defines, manages and accesses synchronized sets of data and maintains these synchronized sets of data external from the host computer system's data management facilities in a manner that is completely transparent to the host computer. This is accomplished by the use of the snapshot application data group that extends the traditional sequential data set processing concept of generation data groups.
摘要翻译： 该主机计算机显示该文件服务器系统为多个数据存储设备，这些数据存储设备可使用主计算机的本机数据管理和访问结构由主计算机直接寻址。 然而，文件服务器是智能数据存储子系统，其定义，管理和访问同步的数据集，并且以对主计算机完全透明的方式从主计算机系统的数据管理设备外部维护这些同步的数据集。 这是通过使用扩展生成数据组的传统顺序数据集处理概念的快照应用程序数据组来实现的。
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公开(公告)号：US5430855A
公开(公告)日：1995-07-04
申请号：US299247
申请日：1994-08-31
申请人： Robert Walsh , George A. Rudeseal , Jay S. Belsan
发明人： Robert Walsh , George A. Rudeseal , Jay S. Belsan
CPC分类号： G06F11/2094 , G06F3/0601 , G11B20/18 , G11C29/70 , G06F11/2097 , G06F2003/0692 , G11C29/74
摘要： The data storage subsystem is implemented using an array of data storage elements which vary in data storage characteristics and/or data storage capacity. Control apparatus automatically compensates for any nonuniformity among the data storage elements by selecting a set of physical characteristics that define a common data storage element format. The selected set of physical characteristics may not match any of the disk drives but each disk drive can emulate these selected characteristics. This capability enables the disk drives in the data storage subsystem to be replaced by nonidentical disk drives in a nondisruptive manner to provide continuous data availability.
摘要翻译： 使用在数据存储特性和/或数据存储容量上变化的数据存储元件阵列来实现数据存储子系统。 控制装置通过选择定义公用数据存储单元格式的一组物理特性来自动补偿数据存储单元之间的任何不均匀性。 所选择的一组物理特性可能与任何磁盘驱动器不匹配，但每个磁盘驱动器可以模拟这些选定的特性。 此功能使数据存储子系统中的磁盘驱动器能够以非中断方式替换为非同一磁盘驱动器，以提供连续的数据可用性。
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9.发明授权System for retrieval of a data record by buffering the record in segments and beginning transmission prior to the buffer obtaining the entire record 失效用于通过在片段中缓冲记录并在缓冲器获得整个记录之前开始传输来检索数据记录的系统
公开(公告)号：US5329622A
公开(公告)日：1994-07-12
申请号：US780998
申请日：1991-10-23
申请人： Jay S. Belsan , Charles A. Milligan
发明人： Jay S. Belsan , Charles A. Milligan
CPC分类号： G06F3/0601 , G06F2003/0691
摘要： The multiple step data read apparatus provides a buffer memory (108-0) for each read/write head (110-0) in the rotating media (111-0) data storage system that can store up to the entire track (400) of data that includes the requested data (Sectors 2-6). The data is fragmented such that the data transferred into the read/write head buffer first is transmitted to the control unit first whether or not that data is at the beginning of the data requested by the control unit. The data is further fragmented such that critical portions of the data are available to the control unit to satisfy the host request as soon as the data is read from the device. This fragmenting results in the data becoming available to the control unit in the minimum time possible and the performance of the subsystem being the maximum possible. In addition each data fragment transfer to the control unit (104) is initiated a predetermined time before the end of the fragment of data such that the read/write head (110-0) reaches the end of the fragment the same time that the last sector of the fragment is transmitted to the control unit (104).
摘要翻译： 多步数据读取装置为旋转介质（111-0）数据存储系统中的每个读/写头（110-0）提供缓冲存储器（108-0），其可以存储直到整个轨道（400）的 数据包含所请求的数据（扇区2-6）。 数据被分段，使得首先将传送到读/写头缓冲器的数据首先发送到控制单元，无论该数据是否处于由控制单元请求的数据的开头。 数据进一步分段，使得数据的关键部分一旦从设备读取数据就可用于控制单元以满足主机请求。 这种碎片导致数据在最短时间内变得可用于控制单元，并且子系统的性能是最大可能的。 此外，每个数据片段传送到控制单元（104）在数据片段结束之前的预定时间开始，使得读/写头（110-0）到达片段的末端，同时最后 片段的扇区被发送到控制单元（104）。
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公开(公告)号：US5155835A
公开(公告)日：1992-10-13
申请号：US615329
申请日：1990-11-19
申请人： Jay S. Belsan
发明人： Jay S. Belsan
CPC分类号： G06F3/0601 , G06F12/0866 , G06F2003/0697 , G06F2212/312 , G11C29/76
摘要： The disk drive array data storage subsystem functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each containing N+M disk drives. The data storage subsystem does not modify data stored in a redundancy group but simply writes the modified data as a new record in available memory space on another redundancy group. The original data is flagged as obsolete. Virtual tracks that are least used are migrated as part of a free space collection process to low access cylinders, which are, in turn, migrated to secondary media, such as magnetic tape. The migration process is either periodic or demand driven to automatically archive little used data records.
摘要翻译： 磁盘驱动器阵列数据存储子系统作为传统的大型磁盘驱动器存储器，使用冗余组阵列，每组包含N + M个磁盘驱动器。 数据存储子系统不修改存储在冗余组中的数据，而只是将修改后的数据作为另一个冗余组的可用存储空间中的新记录写入。 原始数据被标记为过时。 最少使用的虚拟磁道作为可用空间收集过程的一部分迁移到低访问量的磁盘，而这些磁道依次迁移到辅助介质（如磁带）。 迁移过程是周期性的或需求驱动的，以自动归档少量使用的数据记录。
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