The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2007
Filed:
Jan. 30, 2004
Anand A. Kekre, Pune, IN;
John A. Colgrove, Los Altos, CA (US);
Oleg Kiselev, Palo Alto, CA (US);
Ronald S. Karr, Palo Alto, CA (US);
Niranjan S. Pendharkar, Pune, IN;
Anand A. Kekre, Pune, IN;
John A. Colgrove, Los Altos, CA (US);
Oleg Kiselev, Palo Alto, CA (US);
Ronald S. Karr, Palo Alto, CA (US);
Niranjan S. Pendharkar, Pune, IN;
VERITAS Operating Corporation, Mountain View, CA (US);
Abstract
A virtual copy of data stored in a first memory is created in a second memory. Creating the virtual copy includes, in one embodiment, creating first and second tables in memory each one of which comprises a plurality of multibit entries. Each entry of the first table corresponds to a respective memory region of the first memory. Each entry of the second table corresponds to a respective memory region of the second memory. The first bit of the first and second tables indicates whether the corresponding memory region of the first and second memories, respectively, contains valid data. The second bit of the first and second tables indicates whether data in the corresponding memory region of the first and second memories, respectively, has been modified since the creation of the first and second tables, respectively.