US Patent No: 6,745,305
Number of patents in Portfolio can not be more than 2000
Zeroed block optimization in disk mirroring applications
Stats
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Jun 1, 2004
Issued date -
Dec 13, 2000
filing date -
09/736,523
serial no -
In Force
status
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Abstract
Methods for optimizing disk mirroring synchronization and write operations. Disk mirror synchronization, wherein date stored on a first storage device is duplicated on a second storage device, is performed by examining each data block contained within the first storage device and identifying data blocks that contain only zero data and data blocks containing non-zero data. Requests are sent to the second storage device to create a zeroed data block corresponding to each data block on the first disk device that contains only zero data. A copy of each data block on the first disk drive that contains non-zero data is written to the second storage device. Disk mirror write operations, wherein data written to the first storage device is duplicated on the second storage device, are optimized by intercepting write requests directed to the first storage device, and examining each data block within the write requests to determine if the data block contains only zero data. If a data block contains only zero data, a request is sent to the second storage device to create a zeroed block. If a data block contains non-zero data, the data block is transmitted to the second storage device.
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,835,953 Backup system that takes a snapshot of the locations in a mass storage device that has been identified for updating prior to updating | 340 | 1996 | |
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| 6,378,054 Data backup device and method for use with a computer, and computer-readable recording medium having data backup program recorded thereon | 28 | 1998 | |
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| 5,559,991 Incremental computer file backup using check words | 159 | 1995 | |
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| 5,537,533 System and method for remote mirroring of digital data from a primary network server to a remote network server | 136 | 1994 | |
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| 6,073,221 Synchronization of shared data stores through use of non-empty track copy procedure | 18 | 1998 | |
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| 5,778,395 System for backing up files from disk volumes on multiple nodes of a computer network | 576 | 1995 | |
Patent Citation Ranking
Maintenance Fees
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 1, 2015 |
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