Western Digital Technologies, Inc.

Lawrence Vazhapully Jacob

Mikhail Palityka

Oleg Kragel

Vijay Sivasankaran

Dinesh Kumar Agarwal

Leeladhar Agarwal

Various devices, such as storage devices or systems are configured to efficiently process and update logical mappings within control table sets. Control table sets are often groupings of logical mapping corresponding to the logical locations of data requested by a host-computing device and the physical locations of the data within the memory array. As data is written and erased, these mappings must be updated within the control table set. Received changes to these mappings are typically stored and updated in two locations: a cache memory and a control table update list. By tracking and marking various control table sets as dirty or having undergone multiple changes, additional received updates can be stored and updated in only the cache memory, bypassing the second control table change list. By only utilizing one method of updating control table sets, processing overhead is reduced and various read or write activities are more efficiently done.

Efficient logical to physical mapping updates

Variable Capacity Zone Namespace (ZNS) Flash Storage Data Path. In one example, a data storage device including an electronic processor that, when executing a variable capacity scheme, is configured to determine whether a special indication regarding a particular zone in a ZNS is received, delay an association of a final flash block with the particular zone, receive and stage host data for the particular zone in a staging area, receive a zone close request, compact the host data with other host data for storage in other zones into second host data, and move the second host data to the final flash block that is associated with the particular zone and the other zones. The compaction of the host data with the other host data into the second host data reduces or eliminates padding in the final flash block, and consequently, reduces overhead in the data storage device.

Variable capacity Zone Namespace (ZNS) flash storage data path

Host data stream assignment with space-leveling across storage block containers. In one example, a data storage device including an electronic processor that, when executing a space-leveling scheme, is configured to receive a first host data stream, store the first host data stream in a block container assignment queue (BCAQ), detect a next storage block container switching event, responsive to detecting the next storage block container switching event, randomly select a location of the BCAQ, responsive to randomly selecting the location of the BCAQ, assign a second host data stream located at the location of the BCAQ that is selected to a storage block container of a memory, and control the memory to store the second host data stream in the storage block container that is assigned.

Host data stream assignment with space-leveling across storage block containers

Read Fused Groups with uniform resource allocation. In one example, a data storage device including an electronic processor that, when executing the Uniform Read Fused Group scheme, is configured to receive information indicating each zone of a plurality of Zone Namespace (ZNS) zones is assigned to one of a plurality of Read Fused Groups (RFGs), assign a portion of a plurality of resources of a memory to the plurality of ZNS zones, control all of the plurality of concurrency units to process a first resource of the plurality of resources assigned to a first Read Fused Group (RFG) of the plurality of RFGs. The first resource is assigned to a first zone of the plurality of ZNS zones, the first zone is assigned to the first RFG, and the electronic processor is one of the plurality concurrency units.

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Folsom, CA, United States of America

Lawrence Vazhapully Jacob