Huawei Technologies Co., Limited

Hewlett Packard Enterprise Development LP

Chun Liu

Chaohong Hu

Xin Liao

Umesh Maheshwari

Jea Woong Hyun

A method of operating a computing system comprises defining a zoned namespace for non-volatile memory (NVM) of a memory device of the computing system, the zoned namespace including multiple NVM zones of multiple non-overlapping logical block addresses (LBAs) of the NVM, mapping persistence logging (PLOG) identifiers (IDs) to the NVM zones, a PLOG ID identifying a PLOG zone of one or more NVM zones, and performing a PLOG-specific access operation on a PLOG zone of the NVM in response to a PLOG-specific command received from a host device of the computing system.

Persistence logging over NVM express for storage devices application

Write operation and garbage collection methods are provided for a Solid State Drive (SSD) controller of a SSD having Not-AND (NAND) flash memory devices with on-die Static Random Access Memory (SRAM) and NAND flash memory. In the write operation method, a received block of data is stored in on-die SRAM of the NAND flash device, rather than in on-chip SRAM of the controller, prior to programming into NAND flash memory. Until programmed into NAND flash memory, the block of data remains available in the on-die SRAM to fulfill an 'immediate read' operation, if received. In the garbage collection method, blocks of data are read from one or more source NAND flash devices and stored in on-die SRAM of a destination NAND flash device until a limit of such blocks has been reached, then the destination NAND flash device programs the blocks from the on-die SRAM into NAND flash memory.

Method for using NAND flash memory SRAM in solid state drive controller

Methods, systems, and computer programs are presented for storing data in a solid state drive (SSD). One method includes an operation for detecting a plurality of streams writing to the SSD, each stream writing in sectors, a page including a plurality of sectors and a block including a plurality of pages. A write operation includes writing at least one complete page, and an erase operation includes erasing at least one complete block. The method further includes operations for allocating a write buffer for each stream in RAM memory, and for storing each received sector of a stream in the corresponding write buffer. When a write buffer stores enough sectors to fill a page, content of the write buffer is written to a page in flash memory such that the page is filled. Further, the write buffer is freed after writing the content of the write buffer to the flash memory.

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San Jose, CA, United States of America

Chun Liu