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| Number | Title | Issue Date |
| 6598134 | System and method for on-line, real time, data migration A system and method for providing on-line, real-time, transparent data migration from an existing storage device to a replacement storage device. The existing and replacement storage devices are connected as a composite storage device that is coupled to a... | 07/22/2003 |
| 6594743 | Disk-Cloning method and system for cloning computer data from source disk to target disk A disk-cloning method and system is provided for cloning computer data from a source disk to a target disk. This disk-cloning method and system can be utilized, for example, in the computer assembly line to clone a preselected set of software programs to ... | 07/15/2003 |
| 6594744 | Managing a snapshot volume or one or more checkpoint volumes with multiple point-in-time images in a single repository In a storage system, such as a storage area network, a snapshot volume or one or more checkpoint volumes are formed from the same base volume using a single repository containing multiple images of data stored in the base volume. The first image is starte... | 07/15/2003 |
| 6594745 | Mirroring agent accessible to remote host computers, and accessing remote data-storage devices, via a communcations medium A hardware-based mirroring agent that provides a LUN-based I/O interface to remote host computers, including mirrored LUNs, implemented via remote data storage devices. The hardware-based mirroring agent is similar to a disk array, but manages and provide... | 07/15/2003 |
| 6591335 | Fault tolerant dual cache system Managing data in cache includes providing data from a disk storage area to a first cache memory, providing data from the disk storage area to a second cache memory, where the first and second cache memories contain at least some data that is not stored in... | 07/08/2003 |
| 6591351 | Storage system making possible data synchronization confirmation at time of asynchronous remote copy A synchronization confirmation method required for operation of a database is provided to a host device connected to a disk device which provides remote asynchronous data transfer. Immediately after commit of write data, an application of the host device ... | 07/08/2003 |
| 6587933 | Method, system, and program for discarding data in a storage system where updates to a primary storage device are shadowed in a secondary storage device Provided is a method, system, and program for releasing storage space in a first and second storage devices. Updates to the first storage device are copied to the second storage device to provide secondary storage for the updates. A first and second table... | 07/01/2003 |
| 6587935 | Method and apparatus for mirroring data in a remote data storage system A data processing network including a local system and a geographically remote system. Each of the local and remote systems includes a data storage facility. The remote data storage facility mirrors the local data storage facility. In a normal operating m... | 07/01/2003 |
| 6584583 | Method and apparatus for restoring data damaged by a computer virus on a magnetic information recording disk in a hard disk drive In a technique for restoring data damaged by a computer virus on a magnetic information recording disk in a hard disk drive, booting information required to boot the hard disk drive and file position information indicating the position of a file when data... | 06/24/2003 |
| 6584551 | System and method for automatic dynamic expansion of a snapshot repository A system and method for dynamically expanding a snapshot repository based on predefined parameters is disclosed. The snapshot repository is monitored for determining if the amount of information stored in the snapshot repository has reached a predetermine... | 06/24/2003 |
| 6581143 | Data processing method and apparatus for enabling independent access to replicated data A data storage facility that allows data on a standard device to be replicated to other storage devices for independent and concurrent access. The standard device includes first and second tables for monitoring the operation of the standard device. The ot... | 06/17/2003 |
| 6578121 | File mapping system and related techniques A system for efficiently representing or "mapping" data so that it can be rapidly communicated to a back-up storage system from a primary processor or a shared storage device while at the same time allowing a backup system to backup files rather than devi... | 06/10/2003 |
| 6578120 | Synchronization and resynchronization of loosely-coupled copy operations between a primary and a remote secondary DASD volume under concurrent updating A method for assuring consistency between a primary volume and a remote secondary volume wherein a host CPU manages track-to-track transfers using loosely-coupled, storage control unit mediated data paths. The method includes initial volume synchronizatio... | 06/10/2003 |
| 6577912 | Computer device for production equipment A computer device 1 for production equipment comprises an arithmetic unit 10, an input device 11 for inputting operation data, a display device 12 for displaying operation data, and an HDD device 13 for storing an arithmetic unit 10 executed processing pr... | 06/10/2003 |
| 6574709 | System, apparatus, and method providing cache data mirroring to a data storage system The invention provides a system structure, method and computer program product for mirroring cache data from a first controller to an alternate controller in a data storage system, where the data storage system is being managed by the controllers in dual ... | 06/03/2003 |
| 6571350 | Data storage method and data storage for averaging workload in a redundant storage configuration Duplicate data are stored in separate storage units SU(0) 16 and SU(1) 26, respectively. The storage area in each of SU(0) 16 and SU(1) 26 is divided into master storage regions and sub storage regions each of which is allocated alternately to the storage... | 05/27/2003 |
| 6571324 | Warmswap of failed memory modules and data reconstruction in a mirrored writeback cache system A warmswap operation to replace modules in a mirrored cache system has been accomplished by disabling mirrored write operations in the cache system; testing the replacement memory module in the cache system; and restoring the mirrored data in the cache sy... | 05/27/2003 |
| 6567892 | Use of activity bins to increase the performance of disk arrays A disk array controller reliably improves performance in RAID configurations without the need for a battery backup. Write completion interrupts are queued until a write cache flush has been performed and are then sent to a host system. States of ranges of... | 05/20/2003 |
| 6564235 | Computer system having backup function A computer unit with excellent backup function is realized. A backup operation system is set, and based on the setting, a data file under editing or the like is saved in a backup section. The backup operation system is distinguished through existence of e... | 05/13/2003 |
| 6564231 | Method for managing optical disk library files in accordance with the frequency of playback requests selected simultanenously at a specified time intervals A method for managing files in a library in a manner to access files in a library operating with a plurality of preservation recording media storing data as files, while copying data more highly required to be reproduced to another storage device of high-... | 05/13/2003 |
| 6557089 | Backup by ID-suppressed instant virtual copy then physical backup copy with ID reintroduced A backup copy of a source data volume is created by first performing an instant virtual copy with source volume identifier (ID) suspended, then creating a physical tape backup copy from the instant virtual copy with the source volume ID being reintroduced... | 04/29/2003 |
| 6553470 | Backup memory configuration and transmission system using the same A backup memory for constituent packages constituting a transmission system for communication stores a key code identifying the package and configuration data for the package. The constituent packages can be started in a parallel manner based on key code ... | 04/22/2003 |
| 6549980 | Manufacturing process for software raid disk sets in a computer system A method of manufacturing a computer includes creating a reference two-disk software RAID pair, the software RAID pair having desired partitions mirrored by an operating system. The method also includes extracting a master image from one disk of the refer... | 04/15/2003 |
| 6549992 | Computer data storage backup with tape overflow control of disk caching of backup data stream A data storage system is constructed to rapidly respond to a backup request by streaming backup data from primary storage to tape. It is desirable to permit the data to be removed from the primary storage at a faster rate than it can be written to tape. T... | 04/15/2003 |
| 6546474 | Method and system for the fast backup and transmission of data In accordance with the present invention, the fastest possible one-to-one copying of data files which are to be backed up is performed from a source storage medium to a target storage medium. The data files include usable data and management data. After t... | 04/08/2003 |
| 6546459 | Redundant data storage systems and methods of operating a redundant data storage system Redundant data storage systems and methods of operating a redundant data storage system are presented. In one aspect of the invention, a redundant data storage system includes: a plurality of storage devices configured to redundantly store digital data; a... | 04/08/2003 |
| 6546472 | Fast suspend to disk A computer system supports a fast hibernation operation to save power, while minimizing the amount of time it takes to enter the hibernation mode, and to resume normal operations. The system periodically stores data from system memory to non-volatile memo... | 04/08/2003 |
| 6542961 | Disk storage system including a switch A disk storage system containing a storage device having a record medium for holding the data, a plurality of storage sub-systems having a controller for controlling the storage device, a first interface node coupled to a computer using the data stored in... | 04/01/2003 |
| 6542909 | System for determining mapping of logical objects in a computer system A method and apparatus for manipulating data in a storage device that is coupled to a host computer. Manipulations that can be performed by the storage device include moving non-contiguous blocks of data between the host computer and the storage device in... | 04/01/2003 |
| 6542975 | Method and system for backing up data over a plurality of volumes Disclosed is a method and system for backing up image data from one or more partitions of a storage device onto one or more backup media. Each backup medium defines backup volume having a predetermined storage capacity with each partition having a plurali... | 04/01/2003 |
| 6539463 | Disk-array apparatus capable of performing writing process in high transmission speed and surely avoiding data loss A disk-array apparatus comprises a plurality of disk-medium modules, a first through a fourth memory modules, and a director module connected to a host. The first and the third memory modules are combined with each other so as to serve as a first memory m... | 03/25/2003 |
| 6539402 | Using periodic spaces of block ID to improve additional recovery Audit Trail recovery is enhanced by including addresses of immediately prior periodic saves of all active or open Steps or transactions in each new period save area. Reduced cost in main memory usage and on-the-fly processing to accomplish audit trail for... | 03/25/2003 |
| 6539462 | Remote data copy using a prospective suspend command In a computer system, the controller of one or more primary data recording devices sends update information to the controller of one or more secondary data recording devices to maintain a remote copy of data stored on the primary data recording devices. T... | 03/25/2003 |
| 6539461 | Data saving method and external storage device A data saving method, apparatus and computer program which operates in an information processing system including a first external storage device, a host device which performs data input and/or output operations to and/or from the first external storage d... | 03/25/2003 |
| 6535967 | Method and apparatus for transferring data between a primary storage system and a secondary storage system using a bridge volume A method and apparatus for transferring data from a first storage system to a second storage system in which the first storage system includes a first plurality of storage devices and the second storage system includes a second plurality of storage device... | 03/18/2003 |
| 6532527 | Using current recovery mechanisms to implement dynamic mapping operations A method for using existing internal mapping mechanisms to dynamically map data in a computer storage subsystem is provided. The invention comprises using a dynamic mapping mechanism to mark (e.g., via a D-Mark) a data location and then using pointers to ... | 03/11/2003 |
| 6529976 | Heterogeneous computer system, heterogeneous input output system and data back-up method for the systems In a heterogeneous computer system, a heterogeneous input/output system and a data back-up method for the systems, an I/O subsystem A for an open system and an I/O subsystem B for a mainframe are connected by a communication unit. In order to back up data... | 03/04/2003 |
| 6529944 | Host system for remote control of mass storage volumes using cascading commands A host system for remote control of mass storage volumes using cascading commands which collect information about linked remote volumes located in physically separate sites so other cascading commands can be issued to effect changes in linked remote volum... | 03/04/2003 |
| 6530003 | Method and system for maintaining data coherency in a dual input/output adapter utilizing clustered adapters A method for maintaining data coherency in a dual Input/Output(I/O) adapter having primary and secondary adapters, wherein each of the primary and secondary adapters includes resident write cache data and directory storage devices. The method includes uti... | 03/04/2003 |
| 6526487 | Performing acknowledged operations on original and mirrored copies of data Obtaining mirrored data so that the original data can be recovered after failure without transmitting the entire mirrored data between computers. A write request at a primary computer is stored in a delay buffer and a copy is transmitted to a backup compu... | 02/25/2003 |
