Sandisk Technologies Inc.

Western Digital Technologies, Inc.

Zelei Guo

Deepak Raghu

Nian Niles Yang

Dana Lee

Henry Chin

Niles Yang

Eran Erez

Philip David Reusswig

Pao-Ling Koh

Dmitry Vaysman

Pitamber Shukla

Nan Lu

Joanna Lai

Chao-Han Cheng

Chris Nga Yee Yip

Tienchien Kuo

Systems, methods, and/or devices are used to manage open blocks within non-volatile storage devices, in order to improve the reliability of non-volatile storage devices. In some embodiments, when a shut-down request is received from a host device, the storage device fetches information about open blocks and their boundary regions susceptible to data reliability issues, and for each identified boundary region, the storage device programs a region contiguous to the identified boundary region. In some embodiments, the device updates an XOR parity table used for XOR parity management with the information that the region contiguous to the identified boundary is programmed. Subsequently, in some embodiments, the storage device can use the information, stored in the contiguous region and/or the XOR parity table, for data recovery in the event of a data loss. As a result, the reliability of the non-volatile storage device is improved.

Method and system for improving open block data reliability

A storage system and method for handling overheating of the storage system are disclosed. The method comprises determining whether a temperature sensed by a temperature sensor is above a first threshold temperature; and in response to determining that the temperature sensed by the temperature sensor is above the first threshold temperature, lowering a voltage supplied by a power supply to one or more components in the storage system comprising transistors, wherein lowering the voltage supplied to the one or more components reduces temperature by reducing leakage current of the transistors.

Storage system and method for handling overheating of the storage system

A storage device with a memory may utilize an optimized read retry operation. A read retry table includes a number of read retry cases with updated read thresholds. The read thresholds in the read retry table may be used to avoid errors caused by shifting of charge levels. The optimization of read retry includes weighting or reordering of the read retry cases in the read retry table. The selection of a read retry case (and corresponding read thresholds) are determined based on the weighting or reordering.

Memory system with a weighted read retry table

Performance improvement features can improve the performance of read processes under the right conditions. In order to selectively use the performance improvement features, the system conducts active read sampling to obtain information about bit error rate and then enables the performance improvement feature(s) for future read processes based on the information about bit error rate.

Non-volatile storage system with self-test for read performance enhancement feature setup

A storage system includes a controller that is configured to make host data inaccessible. To do so, the controller may control power control circuitry to supply pulses to storage locations storing host data. The pulses may include flash write pulses but no erase pulses, or a combination of flash write pulses and erase pulses. If erase pulses are supplied, the number of the erase pulses may be less than the number supplied for performance of a default erase operation.

Accelerated physical secure erase

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Zelei Guo