Patents by Inventor Srinivvasan Viswanathan

Srinivvasan Viswanathan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dynamic data space
    Patent number: 7003714
    Abstract: A data storage system, such as RAID, upgraded dynamically including multiple stages, providing error checking data without taking the system off-line. Checksums are computed from the data and placed in block 63 of the same disk. The combination of parity bits across the parity disk, the remaining uncorrupted data in the data disks, and checksums within each disk includes sufficient information to enable restoration of corrupt data. The system is upgraded by reserving permanent checksum blocks, writing the checksums to a volume block number, and placing the checksums in permanently reserved checksum block locations after first moving data already there to unreserved blocks.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: February 21, 2006
    Assignee: Network Appliance, Inc.
    Inventors: Rajesh Sundaram, Srinivvasan Viswanathan, Alan Rowe, Steven R. Kleiman, John K. Edwards
  • Dynamic data space
    Patent number: 6728922
    Abstract: A data storage system, such as RAID, upgraded dynamically including multiple stages, providing error checking data without taking the system off-line. Checksums are computed from the data and placed in block 63 of the same disk. The combination of parity bits across the parity disk, the remaining uncorrupted data in the data disks, and checksums within each disk includes sufficient information to enable restoration of corrupt data. The system is upgraded by reserving permanent checksum blocks, writing the checksums to a volume block number, and placing the checksums in permanently reserved checksum block locations after first moving data already there to unreserved blocks.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: April 27, 2004
    Assignee: Network Appliance, Inc.
    Inventors: Rajesh Sundaram, Srinivvasan Viswanathan, Alan Rowe, Steven R. Kleiman, John K. Edwards