Western Digital Technologies, Inc.

Rakshit Tikoo

Yogendra Singh Sikarwar

Ankit Vijay Naghate

Arun Thandapani

Adarsh Sreedhar

Niraj Srimal

Lee M Gavens

Lovleen Arora

Aditya Gadgil

Milind Giradkar

Ashish Singla

Systems and methods are disclosed for providing parallel data transfer. In certain embodiments, a data storage device includes a non-volatile memory and a controller configured to: receive a command from a host to obtain a file stored in the non-volatile memory; determine a plurality of channels available between the host and the data storage device; dynamically divide the file into a plurality of chunks based at least in part on the plurality of channels; perform load balancing to determine a first chunk of the plurality of chunks to be sent over a first channel of the plurality of channels and at least a second chunk of the plurality of chunks to be sent over a second channel of the plurality of channels; and simultaneously transmit the first chunk over the first channel and the second chunk over the second channel.

Systems and methods for power and performance improvement through dynamic parallel data transfer between device and host

Aspects of a storage device including a memory and a controller are provided which reduces or eliminates garbage collection in zoned namespace (ZNS) architectures by mapping zones to sub-blocks of blocks of the memory. Each zone includes a plurality of logical addresses. The controller determines a number of open zones, and maps the open zones to the sub-blocks in response to the number of open zones meeting a threshold. Thus, larger numbers of open blocks typically present in ZNS may be reduced, and increased block sizes due to scaling may be accommodated in ZNS. In some aspects, the controller receives a request from a host device to write data associated with the zones in sub-blocks, and maps each of the zones to at least one of the sub-blocks in response to the request. The request may indicate zones are partially unused. Thus, out of zone conditions may also be avoided.

Zoned namespace limitation mitigation using sub block mode

A storage system has a memory with primary and secondary blocks. Data is stored redundantly in the primary and secondary memory blocks but in a different programming order. For example, data is programmed in the first memory block starting at a first wordline and ending at a last wordline, while data is programmed in the second memory block starting at the last wordline and ending at the first wordline.

Storage system and dual-write programming method with reverse order for secondary block

A memory device includes logic to detect the last page written in multi-plane non-volatile memory. The device includes a memory array, and a storage controller. The memory array includes multiple planes and multiple word lines operable on the memory array. The storage controller is configured to divide the word lines into contiguous sub-ranges and assign a subset of the word lines to boundaries of the sub-ranges. Each word line of the subset of word lines is assigned to a page in a different one of the memory planes. The controller operates the subset of word lines to sense a page programmed or erased state from each of the memory planes in parallel.

Detecting last page written in multi-plane non-volatile memory

A storage system and method for smart folding are provided. In one example, the storage system has a memory with a plurality of single level cell (SLC) blocks and a multi-level cell (MLC) block. The MLC block has a plurality of pages, each with a different sense time. The storage system tracks a read count of each of the plurality of SLC blocks and determines how to fold the plurality of SLC blocks into the plurality of pages based on the read count of each of the plurality of SLC blocks and the sense time of each of the plurality of pages. In this way, SLC blocks with higher read counts can be folded into pages that have faster sense times.

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Uttar Pradesh, India

Rakshit Tikoo