Weighting of read commands to zones in storage devices
US11210027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2020 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | May 20, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0679
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a storage unit divided into a plurality of zones, each zone comprises a plurality of erase blocks. Data is written to an erase block of a zone to a program point that is less than the writeable capacity of the erase block. The data in the erase block is associated with various read weights dependent on the location of the data relative to the program point. Data stored closer to the program point has a higher read weight than data stored closer to the beginning of the erase block. The read weights indicate an error susceptibility of the data. When one or more read commands are received, the read weights of the data being read are accumulated to estimate the bit error accumulation until a predetermined value is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.