Western Digital Technologies, Inc.

Arvind Kumar V M

Ravishankar Surianarayanan

Aspects of a storage device are provided that handle pairing and atomic processing of fused commands received from submission queues based on data structures such as a linked lists which the controller respectively associates with each submission queue. A memory of the storage device includes a plurality of data structures each associated with a different submission queue. A controller of the storage device receives a first command for a fused operation from a submission queue, stores the first command in a data structure, receives a second command for the fused operation from the submission queue, determines whether the second command corresponds to the fused operation, stores the second command in the data structure in response to the determination, and performs the fused operation in response to storing the second command. As a result, fused command handling may be achieved with minimal impact to queue arbitration logic and command latency.

Fused command handling

Multiple logical-to-physical translation tables (L2PTTs) for data storage devices having indirection units of different sizes. In one embodiment, a data storage controller includes a memory interface configured to interface with a memory, the memory including a zoned namespace, the zoned namespace including a plurality of zones. The data storage controller includes a controller memory including two or more logical-to-physical translation tables (L2PTTs), and an electronic processor. The electronic processor is configured to receive data to be stored in a zone of the plurality of zones, determine whether the zone is an active zone, select, in response to determining that the zone is the active zone, a first L2PTT having a first indirection unit size, and select, in response to determining that the zone is not the active zone, a second L2PTT having a second indirection unit size.

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Bengaluru, India

Arvind Kumar V M