Sandisk Technologies Inc.

Prathmesh Tandon

Lovish Singla

Shaheed Nehal A

Ankit Gupta

Payal Kriplani

A controller of a data storage device manages access to sequential streams based on predicted commands from a host device. When a command is received, the controller analyzes command characteristics associated with the command. The controller also analyzes command characteristics associated with each predicted command. The controller compares the command characteristics to determine whether any of the predicted commands are sequential to the received command. If the controller determines that one or more of the predicted commands are sequential to the received command, the controller enables data associated with the received command to be written to a sequential stream. The controller also updates a stream counter associated with the sequential stream. The stream counter is used to determine which sequential stream will be closed and subsequently opened when a new set of sequential commands is received or identified.

Managing streams based on predicted host commands

A data storage device can use a jump range to identify whether a new write command received from a host is part of a sequential stream of write commands even though the logical block address of the new write command is not sequential to the logical block addresses of those other commands. However, using a fixed jump range can result in a new random write command being misclassified as a sequential write command, or vice versa. To address this problem, the embodiments presented herein describe a data storage device that uses a dynamic jump range based on a pattern of write commands previously received from the host. Other embodiments are provided.

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Bengaluru, India

Prathmesh Tandon