Western Digital Technologies, Inc.

Raviraj Raju

Kalpit Bordia

Disha Gundecha

Sridhar Prudvirag Gunda

A storage system has a memory with a multi-level cell (MLC) block that can store multiple bits per cell or can be constrained to store only one bit per cell. Using the MLC block to store only one bit per cell can increase the performance of the storage system but can also reduce endurance of the MLC block. The storage system can monitor a command queue to determine the performance needed. With that information, the storage system can determine whether it is worth making the tradeoff of increasing performance at the cost of endurance.

Storage system and method for using a queue monitor in a block allocation process

A QLC based data storage device leverages a host memory buffer (HMB) to achieve QLC direct write that increases performance of the QLC data storage device and reducing or eliminating disadvantages associated with a QLC folding approach. In one example, the QLC based data storage device includes a controller configured to receive a request to write data to a non-volatile memory, determine whether the request is a sequential write operation, determine whether a HMB of the data storage device is enabled, determine whether a HMB allocation is successful for a quad-level cell direct write, and responsive to determining that the request is not the sequential write operation, the HMB of the data storage device is enabled, and the HMB allocation is successful for the quad-level cell direct write, perform a direct write operation in a quad-level cell block of the non-volatile memory.

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Bengaluru, India

Raviraj Raju