Per-drive memory resident zeroing maps for drive zeroing in a data storage system
US10089015B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2016 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Feb 14, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0601
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed for drive zeroing that create and maintain a memory resident zeroing map for each drive in a data storage system. The disclosed techniques create, for each drive in an array of non-volatile data storage devices, a zeroing map. The zeroing map for a drive includes multiple slots, each of which corresponds to a data storage area of the drive. Each slot in the zeroing map for a drive stores a zeroing status of the corresponding data storage area. The value of a slot in the zeroing map may indicate that the zeroing status of the corresponding data storage area is i) zeroed, indicating that the corresponding data storage area has previously been zeroed, or ii) unknown, indicating that the zeroing status of the corresponding data is unknown, i.e. the corresponding data storage area may or may not have previously been zeroed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.