Sandisk Corporation

Sandisk Technologies Inc.

Microelectronica Espanola S.a.u.

Sandisk Corproation

Longitude Flash Memory Systems S.à R.l.

Robert C Chang

Farshid Sabet-Sharghi

Bahman Qawami

Po Yuan

Fabrice Jogand-Coulomb

Mei Yan

Xian Jun Liu

Ping Li

Jong Guo

Kevin M Conley

Oktay Rasizade

Jason T Lin

Michael Holtzman

Henry Hutton

Haluk Tanik

Junzhi Wang

Paul McAvoy

Sergey Yudin

Yoram Cedar

Ron Barzilai

Chieh-Hao Yang

Eric Bone

Farshid Sabet-sharghi

Javier Canis Robles

June Li

Wes G Brewer

Javier CAÑIS Robles

Haluk K Tanik

Jason Lin

A file system and method of file access are disclosed. In a particular embodiment, a method is performed at a host device coupled to a data storage device, where the host device includes a memory storing a file data structure. The host device receives a request to open a file and, in response to the request, retrieves location data of the file from the file data structure. The host device reads data of the file from the data storage device based on the location data and extracts metadata from the data of the file.

File system and method of file access

Technology for replacing a first storage unit operatively coupled to a device is provided. Content of the first storage unit is sent to a new storage unit that serves as the replacement of the first storage unit. In one embodiment, the content is first sent to a trusted third-party server and then transferred from the server to the new storage unit. A portion of the content on the new storage unit is adjusted in one embodiment to maintain content security features that were implemented in the first storage unit. The upgrading can be performed under the control of a software entity that is installed on the device. In various embodiments, the first storage unit may be bound to a third storage unit prior to the upgrade process. In such cases, the process can include measures to bind the new storage unit to the third storage unit.

Memory device upgrade

Techniques are presented for sending an application instruction from a hosting digital appliance to a portable medium, where the instruction is structured as one or more units whose size is a first size, or number of bytes. After flushing the contents of a cache, the instruction is written to the cache, where the cache is structured as logical blocks having a size that is a second size that is larger (in terms of number of bytes) than the first size. In writing the instruction (having a command part and, possibly, a data part), the start of the instruction is aligned with one of the logical block boundaries in the cache and the instruction is padded out with dummy data so that it fills an integral number of the cache blocks. When a response from a portable device to an instruction is received at a hosting digital appliance, the cache is similarly flushed prior to receiving the response. The response is then stored to align with a logical block boundary of the cache.

Integration of secure data transfer applications for generic IO devices

A first storage unit is bound to a second storage unit based on a binding type associated with content on the first storage unit, the first storage unit being operated through a first host device, and the second storage unit being operated through a second host device. When content on the first storage unit is requested in the first host device, the first host device will calculate an account identifier based on the binding type associated with the requested content and send the account identifier to a server. The server will send the account identifier to the second host device, and the second storage unit will use the account identifier to calculate a credential. The credential will be sent to the first host device through the server. The credential can be used to access the requested content if the credential is valid.

Accessing memory device content using a network

One or more rights objects (RO) files may be used for storing RO's preferably in the protected area available only to authenticated users. A RO navigation file is stored preferably in an unprotected public area containing status bits, where each status bit identifies whether a location in a RO file contains a valid RO or not. Preferably, there is a one-to-one correspondence between the location for a RO in a RO file and a location in the RO navigation file for the status bit which identifies whether its corresponding location in the RO file contains a valid RO or not. Whether a particular location in a RO file contains a valid RO or not can be found by checking its corresponding status bit in the RO navigation file.

Method for managing keys and/or rights objects

In one embodiment, a method for managing information in a large capacity UICC is provided comprising storing content of a file in a mass storage file system of the large capacity UICC, associating the file in the mass storage file system with a file in an ISO file system of the large capacity UICC, wherein the ISO file is associated with a security configuration defining security requirements for allowing its access; and hiding the content of the file in the mass storage file system in order to make it inaccessible. The method can further comprise requesting access from the mass storage file system to content of a file in the mass storage file system; and, if hidden, delivering security requirements to the ISO file system and determining whether the delivered security requirements agree with the security configuration of the file in the ISO file system associated with the file in the mass storage file system; and, if so, revealing the content to make it accessible.

Method of mass storage memory management for large capacity universal integrated circuit cards

A method for interfacing with a memory card is provided. In this method, a selection of a program instruction is provided and the program instruction associated with the selection is read from the memory card. The program instruction thereafter is executed. Systems and computing devices for interfacing with the memory card also are described.

Method for interfacing with a memory card to access a program instruction

Methods and apparatus for allowing tables to be adaptively backed up are disclosed. According to one aspect of the present invention, a method for operating a memory system with a non-volatile memory that includes a reserved memory area, a plurality of physical blocks and a plurality of data structures including an erase count block involves determining when contents associated with at least one data structure of the plurality of data structures are to be substantially backed up. A request to substantially back up the contents associated with the at least one data structure is executed when it is determined that the contents associated with the at least one data structure are to be substantially backed up. Executing the request allows contents associated with the at least one data structure are substantially backed up in the reserved memory area.

Adaptive internal table backup for non-volatile memory system

A file system and method of file access are disclosed. In a particular embodiment, a method is performed at a host device coupled to a non-volatile memory, where the host device includes a memory having a first file data structure. A first directory entry in a file directory of a file system is located where the first directory entry corresponds to a first file stored in the non-volatile memory. First data associated with the first directory entry, including first location data indicating a location of the first file in the non-volatile memory, is retrieved and stored in the first file data structure. A request to open the first file is received. In response, the first location data of the first file is retrieved from the first file data structure and data of the first file from the non-volatile memory is read. First metadata associated with the first file is extracted from the data read from the non-volatile memory.

A method of controlling data access to non-volatile memory is disclosed. The method includes storing a data file in a non-volatile memory. The non-volatile memory includes a memory array including a plurality of address ranges one or more of which corresponding to a protected portion of the memory array and one or more of which corresponding to an unprotected portion of the memory array. The method also includes communicating to a host device an indication that a memory request with respect to the protected portion of the memory array is denied. The indication is communicated for instructing the host device to avoid a timeout when the memory request is denied.

Controlled data access to non-volatile memory

A secure software package for original equipment manufacturers to run in electronic devices in order to access and dynamically decrypt encrypted audio video or other content from a memory storage device such as a memory card, optical or hard disk such that the user interface of the device need only send simple commands and the decrypted content is output.

System, method and device for playing back recorded audio, video or other content from non-volatile memory cards, compact disks, or other media

Methods and apparatus for using different error correction code algorithms to encode and to decode contents of blocks within a non-volatile memory are disclosed. According to one aspect of the present invention, a method for storing data within a non-volatile memory includes identifying a first block into which the data is to be stored, and obtaining an indicator associated with the first block. A determination may then be made regarding whether the indicator indicates that the data is to be encoded using a first algorithm. The data is encoded using the first algorithm when it is determined that the data is to be encoded using the first algorithm, after which point the data encoded using the first algorithm is written into the first block.

Hybrid implementation for error correction codes within a non-volatile memory system

One or more rights objects (RO) files may be used for storing RO's preferably in the protected area available only to authenticated users. A RO navigation file is stored preferably in an unprotected public area containing status bits, where each status bit identifies whether a location in a RO file contains a valid RO or not. Preferably, there is a one-to-one correspondence between the location for a RO in a RO file and a location in the RO navigation file for the status bit which identifies whether its corresponding location in the RO file contains a valid RO or not. Whether a particular location in a RO file contains a valid RO or not can be found by checking its corresponding status bit in the RO navigation file. By finding out whether a particular location in a RO file contains a valid RO or not in this manner, it is possible to delete ROs without having to go through an authentication process. The process of finding an empty slot in the RO file for storing a new RO is also simplified. This greatly increases the efficiency of RO management. A similar system may be used for management of content encryption/encryption keys for protecting content files.

Methods and apparatus for efficiently enabling firmware associated with a flash memory card to be updated are disclosed. According to one aspect of the present invention, a method for updating firmware associated with a memory storage device includes providing new firmware to a host and sending the new firmware from the host to a reader which communicates with the host. The reader interfaces with the memory storage device which includes installed firmware. The method also includes sending the new firmware from the reader to the memory storage device, and incorporating the new firmware into the memory storage device such that the new firmware at least partially replaces the installed firmware. In one embodiment, the method further includes embedding the new firmware into a first command. In such an embodiment, sending the new firmware from the host to the reader includes sending the first command from the host to the reader.

Growing community of inventors

Danville, CA, United States of America

Robert C Chang