Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-05-16
2006-05-16
Padmanabhan, Mano (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C714S006130
Reexamination Certificate
active
07047380
ABSTRACT:
A system for data backup includes a storage device, a backup storage device, and an intermediate storage device. Backup procedure is performed on-line and copies data blocks from the storage device into the backup storage device. When a write command is directed to a data storage block identified for backup that has not yet been backed up, the identified data storage block is copied from the storage device to the intermediate storage device, the write command is executed on the identified data storage block from the storage device, and the data storage block is copied from the intermediate storage device to the backup storage device. In case of an error accessing a block on the storage device, the block is marked as invalid. The intermediate storage device can be external to a file system of a computer that includes the storage device, or can be located in the storage device, or can be a separate partition of the storage device, or can be a file within a file system. The system suspends a write command to the storage device during the data backup process if the intermediate storage device has reached a selected data capacity; and copies a selected amount of data from the intermediate storage device to the backup storage device.
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Beloussov Serguei M.
Lyadvinsky Maxim V.
Tormasov Alexander G.
Tsypliaev Maxim V.
Acronis Inc.
Doan Duc T
Padmanabhan Mano
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