Sandisk Technologies Inc.

Samuel Yu

Christopher S Moore

Ron Barzilai

Michael Lavrentiev

Filip Verhaeghe

Richard Matthew Fruin

Jason S Whetstone

Bsa Chung

Hironaga Ino

A system and method are disclosed for an event lock storage device. The storage device includes a user partition and an event partition (which may be associated with an event). The storage device receives data from a host device, and stores the data in the user partition. In response to receiving an indication of an event, the storage device may designate the data as part of the event partition. The event partition may include a set of access rules that is different from the user partition, such as more restrictive rules for modification or deletion of a file containing the data.

Controlling operation of a storage device based on an age indicator of the storage device

Event lock storage device

These embodiments relate to authentication and securing of write-once, read-many (WORM) memory devices. In one embodiment, a memory device comprises a controller operable in first and second modes of operation after stored security information is validated, wherein in the first mode of operation, the memory device operates in a read-only mode, and wherein in the second mode of operation, the memory device operates in a write-once, read-many (WORM) mode. In another embodiment, the controller is operative to perform security methods.

Authentication and securing of write-once, read-many (WORM) memory devices

One-time programmable (OTP) and write-once read-many (WORM) memory devices and methods for use therewith are provided. These embodiments can be used to provide compatibility between a memory device that uses an OTP (or few-time programmable (FTP)) memory array and host devices that use a file system, such as the DOS FAT file system, that expects to be able to rewrite to a memory address in the memory device. These embodiments can also be used to prevent accidental or deliberate overwrites, changes, or deletions to existing data in a WORM memory device.

Method and memory device that powers-up in a read-only mode and is switchable to a read/write mode

Memory device operable in read-only and write-once, read-many (WORM) modes of operation

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San Francisco, CA, United States of America

Samuel Yu