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:
Oct. 09, 2007
Filed:
Mar. 17, 2005
Paul Frederick Bartlett, Bristol, GB;
Rhys Wyn Evans, Caerdydd, GB;
Paul Frederick Bartlett, Bristol, GB;
Rhys Wyn Evans, Caerdydd, GB;
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method is provided of detecting if WORM data has been tampered with, the data having been recorded in a sequence of data sets. Each data set includes a write pass value and the write pass values are incremented at intervals in the sequence according to a predetermined rule providing that the write pass values are incremented each time a predetermined number of the data sets has occurred in the sequence. The data sets are read in sequence and the write pass value of each data set is compared with the write pass value of the preceding data set. An indication is made if the write pass value of any of the data sets differs from the write pass value of the preceding data set by an amount that breaches the predetermined rule.