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:
Aug. 06, 1996
Filed:
Apr. 29, 1994
Robert N Hasbun, Shingle Springs, CA (US);
Mark Christopherson, Folsom, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A method of protecting the accuracy of sector of data while the writing the sector of data into a block of a solid state memory disk. First, a sector offset is written into the block to indicate where within the data space of the block the sector data will be located. Second, the sector of data is written into the block. Afterward, the logical sector number that identifies the sector of data is written into the block in two steps. The first step in writing the logical sector number is to write a selected invalid logical sector number into the block. Next, the selected invalid sector number is converted into the valid sector number by programming a power-off bit of the selected invalid logical sector number. Thus, whenever power to the solid state disk is next turned on, the loss of a sector of data and the validity of the sector of data can be determined. The loss of a sector of data is identified by locating a header in the block whose only valid data is the sector offset. The validity of a sector data can be determined by examining the logical sector number. Also described is a method of preventing the introduction of invalid data into the solid state disk as a result of loss of power during the erasure of a block.