초록 ▼

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 up on the backup storage device. The primary

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 up on the backup storage device. The primary systems identify changes that are going to be made to the mass storage device. The combined effected locations in the mass storage device of these identified changes are then captured in a static snapshot when the mass storage device is in a logically consistent state. Only those data blocks changed since the last backup are then transferred to backup system. The backup system can then store these changes or apply the changes to the backup storage device in order to bring the backup storage device current to a particular point in time.

대표청구항 ▼

[ What is claimed and desired to be secured by United States Letters Patent is:] [18.] A computer-readable medium for use in a computer system comprising a mass storage means that stores a plurality of data blocks in a plurality of storage locations, each having a unique address, said computer-reada

[ What is claimed and desired to be secured by United States Letters Patent is:] [18.] A computer-readable medium for use in a computer system comprising a mass storage means that stores a plurality of data blocks in a plurality of storage locations, each having a unique address, said computer-readable medium having computer-executable instructions comprising:means for identifying which of said storage locations has had new data blocks stored therein during a time period that runs from a first instant in time and a second instant in time;means for preserving a static snapshot, at said second instant in time, of the storage locations that have had new data blocks stored therein between said first instant in time and said second instant in time, said static snapshot including at least one unchanged data block that has been transferred, after said second instant in time, from one of said identified storage locations to said means for preserving a static snapshot before said one of said identified storage locations is changed by having a new data block written thereto;means for retrieving the data blocks that were preserved by said static snapshot; andmeans for transferring the retrieved data blocks to a backup system.