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| Number | Title | Issue Date |
| 6085298 | Comparing mass storage devices through digests that are representative of stored data in order to minimize data transfer A system and method for comparing mass storage devices. Generally, a mass storage device is subdivided into data blocks representing physical storage locations of some particular size. For each one (or group) of data block(s), a digest is calculated, wher... | 07/04/2000 |
| 6073222 | Using a virtual device to access data as it previously existed in a mass data storage system A system and method for using a virtual device established at a computer system to access data as it existed at a selected moment in a mass storage system associated with the computer system, regardless of whether new data has been written to the mass sto... | 06/06/2000 |
| 5978565 | Method for rapid recovery from a network file server failure including method for operating co-standby servers A method for providing rapid recovery from a network file server failure through the use of a backup computer system. The backup computer system runs a special mass storage access program that communicates with a mass storage emulator program on the netwo... | 11/02/1999 |
| 5835953 | Backup system that takes a snapshot of the locations in a mass storage device that has been identified for updating prior to updating A system and method for maintaining logically consistent backups using minimal data transfer are presented. A system comprises a backup system having a backup storage device and one or more primary systems having mass storage devices that are to be backed... | 11/10/1998 |
| 5812748 | Method for improving recovery performance from hardware and software errors in a fault-tolerant computer system A method for providing rapid recovery from a network file server failure through the use of a backup computer system. The backup computer system runs a special mass storage access program that communicates with a mass storage emulator program on the netwo... | 09/22/1998 |
| 5649152 | Method and system for providing a static snapshot of data stored on a mass storage system A system and method for providing a static snapshot, or image, of data stored on a mass storage system are disclosed. First, a preservation memory is cleared and a virtual device is created. Whenever a write is to be performed on the mass storage system, ... | 07/15/1997 |
