Patents by Inventor Ashwin B. Agrawal

Ashwin B. Agrawal 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).

  • Automatic media error correction in a file server
    Patent number: 7890796
    Abstract: File systems possibly impacted by a bad sector in a disk drive are unmounted. Then the disk drive is scanned in order to identify additional bad sectors, and for each identified bad sector, a logical address of the bad sector is re-vectored to a good sector. An attempt is made to restore the data of each bad sector, and then the file system is checked for consistency. If a bad sector cannot be restored, any application relying on the bad sector is aborted. Once the file system is found to be consistent, the file system is remounted. Re-vectored blocks are reverse mapped to identify damaged or repaired directories and files. Damaged or repaired directories and files are reported to a system administrator, and damaged directories or files of a client are reported to the client.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: February 15, 2011
    Assignee: EMC Corporation
    Inventors: Sitaram Pawar, Jean Pierre Bono, Milena Bergant, Ajay S. Potnis, Ashwin B. Agrawal
  • Automatic Media Error Correction In A File Server
    Publication number: 20080155316
    Abstract: File systems possibly impacted by a bad sector in a disk drive are unmounted. Then the disk drive is scanned in order to identify additional bad sectors, and for each identified bad sector, a logical address of the bad sector is re-vectored to a good sector. An attempt is made to restore the data of each bad sector, and then the file system is checked for consistency. If a bad sector cannot be restored, any application relying on the bad sector is aborted. Once the file system is found to be consistent, the file system is remounted. Re-vectored blocks are reverse mapped to identify damaged or repaired directories and files. Damaged or repaired directories and files are reported to a system administrator, and damaged directories or files of a client are reported to the client.
    Type: Application
    Filed: October 4, 2006
    Publication date: June 26, 2008
    Inventors: Sitaram Pawar, Jean Pierre Bono, Milena Bergant, Ajay S. Potnis, Ashwin B. Agrawal