Sandisk Technologies Inc.

Ankit Rajani

Puspanjali Panda

Ramkumar Muralidharan

A data storage device for performing a deduplication process includes a data interface, a data buffer, a hash buffer, non-volatile storage media, and control circuitry. The control circuitry is configured to receive a plurality of data files from the host device, generate a first hash set for a first file, store the first hash set in the hash buffer, store the first file in the non-volatile storage media, and generate a second hash set for a second file. If the second hash set matches the first hash set, the control circuitry discards data of the second file in the data buffer and replaces the data of the second file with a pointer to the first file. If the second hash does not match any hashes in the hash buffer, the control circuitry stores the second file in the non-volatile storage media and the second hash in the hash buffer.

Deduplication for data transfers to portable storage devices

A host system is configured to upload data files to a cloud system and provide another layer of security to the access controls provided by the cloud system. The host system includes a communication interface for communicating with a storage device and a network interface for communicating with a the cloud system. The host system includes a processors configured to obtain a 2D barcode based on an identifier of the storage device and a network address of an authorizing device associated with an owner of the storage device. The processor is further configured to, responsive to a request to upload a data file to the cloud system, embed the 2D barcode into the data file (the 2D barcode configured to cause a client device attempting to access the data file to send an access request to the authorizing device) and transmit the data file to the cloud system.

Access control for cloud-shared files from a storage device

A storage device ensures the use of a memory device with a degraded plane or die prior to the memory device entering a read-only mode. A controller on the storage device may write host data to a meta block formed in an interleaved manner using good blocks in planes on a first memory device. A virtual space manager may monitor dies and/or planes on the first memory device, determine that remaining good blocks on a first die and/or plane are equal to a minimum block threshold, and send a notification of a pending read-only mode on the first memory device. The notification may include an option to cease to perform write operations to the meta block, backup data on the first memory device, format the first memory device at half capacity and form additional meta blocks, and continue perform host write operations on the additional meta blocks.

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Bengaluru, India

Ankit Rajani