Matches 1 - 50 out of 58 1 2 >
Match Document Document Title
7073090 Remote data mirroring system having a remote link adapter  
A primary data storage system is linked to a geographically remote secondary data storage system for automatically maintaining a remote copy of the data in the primary storage. The primary data...
7055059 Remote data mirroring  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
7016982 Virtual controller with SCSI extended copy command  
A nested translated extended copy function provides direct storage-to-storage copying with no data passing through the virtual controller. In one embodiment, a method for performing an extended...
6961838 Generating updated virtual disks using distributed mapping tables accessible by mapping agents and managed by a centralized controller  
The present invention provides a method for copying data through a virtualized storage system using distributed table driven (I/O) mapping. In a system having a virtual disk (the “original...
6950484 Linearized digital phase-locked loop method  
A method for synchronizing a clock signal to a data signal, comprising the steps of (A) detecting an edge of the data signal, (B) determining whether a position of the edge is within a zone and (B)...
6938125 Storage system with data prefetch function  
A disk storage system has a control unit having a plurality of external ports connectable to a mirrored disk including two disks to which write data is written. When the control unit receives two...
6910101 Storage subsystem with management site changing function  
A storage subsystem which includes a plurality of disk controllers, a plurality of disk drives connected via a network to the plurality of disk controllers, and a path controller connected to the...
6772284 Disk apparatus capable of continuous display of data using a single recording head  
A disk apparatus for reproducing in a preliminary determined order digital video data recorded in a plurality of areas of an optical disk at different positions with respect to the radial position...
6647474 Remote data mirroring system using local and remote write pending indicators  
A primary data storage system is linked to a geographically remote secondary data storage system for automatically maintaining a remote copy of the data in the primary storage. The primary data...
6640281 Storage subsystem with management site changing function  
A storage subsystem which includes a plurality of disk controllers, a plurality of disk drives connected via a network to the plurality of disk controllers, and a path controller connected to the...
6631443 Disk storage system having capability for performing parallel read operation  
A disk storage system has a control unit having a plurality of external ports connectable to a mirrored disk including two disks to which write data is written. When the control unit receives two...
6625705 Remote data mirroring system having a service processor  
A primary data storage system is linked to a geographically remote secondary data storage system for automatically maintaining a remote copy of the data in the primary storage. Each of the data...
6625691 Storage subsystem with management site changing function  
A storage subsystem which includes a plurality of disk controllers, a plurality of disk drives connected via a network to the plurality of disk controllers, and a path controller connected to the...
6587919 System and method for disk mapping and data retrieval  
A data storage system includes data storage and a record locator data structure in random access memory. The record locator data structure includes entries having different lengths. For locating...
6535954 Storage subsystem with management site changing function  
A storage subsystem which includes a plurality of disk controllers, a plurality of disk drives connected via a network to the plurality of disk controllers, and a path controller connected to the...
6502205 Asynchronous remote data mirroring system  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
6418509 System and method for disk mapping and data retrieval  
An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record...
6324655 Input/output controller providing preventive maintenance information regarding a spare I/O unit  
A I/O controller which is connected to a plurality of I/O units and one spare I/O unit, controls a plurality of I/O units based on a command from a master unit, and allows a spare I/O unit to be...
6289398 Distributed storage array system having plurality of storage devices which each of devices including a modular control unit for exchanging configuration information over a communication link  
A RAID-compatible data storage system which allows incremental increases in storage capacity at a cost that is proportional to the increase in capacity. The system does not require changes to the...
6185653 System and method for disk mapping and data retrieval  
An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record...
6179492 Method of and apparatus for duplicating, upgrading and configuring hard disk drives  
A method of and apparatus for utilizing a computer software program to implement a process of performing optional file operations to a data storage media. The method comprises the steps of: (1)...
6173377 Remote data mirroring  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
6131141 Method of and portable apparatus for determining and utilizing timing parameters for direct duplication of hard disk drives  
A method of and an apparatus for duplicating direct access storage devices (DASDs) such as hard disk drives (HDDs). The apparatus includes a portable HDD duplicator which can be connected to an...
6118612 Disk drive synchronization  
A spindle synchronization technique is described which is useful in a disk array subsystem comprising a plurality of disk drives (40,41,42,43) connected by means of serial links (25,26,27,28) to a...
EP0784272B1 Input/output controller  
Abstract of EP0784272 An input/output controller (20) for connection between a host unit (10) and a storage device having a spare storage device (31) and a plurality of data storage devices (30)...
6061194 Device and method for storing and retrieving original and redundant data  
A storage device is described for reading data from a hard disk drive wherein delays due to rotational latency are substantially reduced. The storage device includes a platter having a...
6052797 Remotely mirrored data storage system with a count indicative of data consistency  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
6044444 Remote data mirroring having preselection of automatic recovery or intervention required when a disruption is detected  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
6002540 Method and apparatus for rotary actuator arc compensation correction in a direct access storage device  
Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal is generated at each of a...
5983304 Buffer flush controller of a peripheral component interconnect-peripheral component interconnect bridge  
A buffer flush controller, of a peripheral component interconnect-peripheral component interconnect bridge (PPB), includes a first compounding circuit, a first state machine, a second state...
5909692 System and method for disk mapping and data retrieval  
An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record...
5901327 Bundling of write data from channel commands in a command chain for transmission over a data link between data storage systems for remote data mirroring  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
5889935 Disaster control features for remote data mirroring  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
5854722 Method and apparatus for rotary actuator arc compensation correction in a direct access storage device  
Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal is generated at each of a...
5826003 Input/output controller providing preventive maintenance information regarding a spare I/O unit  
A I/O controller which is connected to a plurality of I/O units and one spare I/O unit, controls a plurality of I/O units based on a command from a master unit, and allows a spare I/O unit to be...
5761705 Methods and structure for maintaining cache consistency in a RAID controller having redundant caches  
Methods and associated apparatus operable in a RAID subsystem having redundant disk array controllers to assure dual, redundant cache consistency while permitting operation of the RAID subsystem in...
5742792 Remote data mirroring  
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a...
5692155 Method and apparatus for suspending multiple duplex pairs during back up processing to insure storage devices remain synchronized in a sequence consistent order  
A data storage system atomically suspends multiple duplex pairs across either a single storage subsystem or multiple storage subsystems. The duplex pairs are suspended such that the data on the...
5664144 System and method for FBA formatted disk mapping and variable-length CKD formatted data record retrieval  
An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record...
EP0784272A1 Input/output controller  
An input/output controller (20) for connection between a host unit (10) and a storage device having a spare storage device (31) and a plurality of data storage devices (30) is described. The...
5546535 Multiple controller sharing in a redundant storage array  
A redundant array storage system including storage units divided into two logical arrays. The redundant array storage system further includes a plurality of array control units which are all fully...
5544357 Database accelerator  
A hardware accelerator for managing a computer database. The accelerator includes a key memory for storing a map of record key values to record address values, a search processor for searching the...
5544347 Data storage system controlled remote data mirroring with respectively maintained data indices  
A data storage system which automatically provides and maintains identical secondary data on a preferably geographically remote secondary data storage device. The system includes a primary host...
5459857 Fault tolerant disk array data storage subsystem  
A pair of operationally independent disk drive array data storage subsystems are used to emulate one or more physical devices shared between two control modules. The storage control units of the...
5446871 Method and arrangement for multi-system remote data duplexing and recovery  
A method and system for asynchronous remote data duplexing at a distant location from copies based at a primary site storage subsystem, which copying is non-disruptive to executing applications,...
5438671 Method and system for transferring compressed bytes of information between separate hard disk drive units  
A two-computer system and method wherein data is transferred between the computers as complete disk images rather than as files. The transfer is made between the parallel ports of the two...
5390313 Data storage system with data mirroring and reduced access time data retrieval  
A data storage system with data mirroring and reduced access time data retrieval includes at least one pair of rotating data storage media each having a plurality of generally identical data...
5379385 Method and means for effectuating rule based I/O data transfer address control via address control words  
A method and means for CPU accessing a staged storage subsystem in which rules defining computation of the storage system addresses are distributed with the data, the rules and storage access being...
5313612 Information recording and reproducing apparatus including both data and work optical disk drives for restoring data and commands after a malfunction  
An information recording and reproducing apparatus has a plurality of optical disk drives including a data optical disk drive for storing data, a work or backup optical disk drive for temporarily...
5287459 Method and apparatus for reducing response time in automated library data retrieval systems  
Access time is improved in a automated library system having sequentially stored data on a recording tape medium. A multiplicity of copies of the data is stored on different tape cartridges. The...
Matches 1 - 50 out of 58 1 2 >