Condensing logical to physical table pointers in SSDs utilizing zoned namespaces
US11200162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2020 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Apr 28, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller, random-access memory (RAM), and a NVM unit, where in the NVM unit comprises a plurality of zones. The RAM unit comprises a logical to physical address (L2P) table for the plurality of zones. The L2P table comprises pointers that are associated with a logical block address (LBA) and the physical location of the data stored in the NVM. The L2P table comprises one pointer per erase block or zone. When a command is received to read data within the NVM, the controller reads the L2P table to determine the LBA and associated pointer of the data. The controller can then determine which zone or erase block the data is stored in, and calculates various offsets of wordlines, pages, and page addresses to find the exact location of the data in the NVM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.