Storage system and method for preserving overwritten data to allow a future rollback
US11880603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2022 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Jul 13, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage system receives a command from a host to overwrite data that is stored in a memory of the storage system. The command may have been issued in error or by malware, so the storage system preserves the data that the host wants to overwrite, just in case the host later wants to recover the data. To do this, the storage system associates the physical address of the location of the memory that stores the data with a logical block address that is inaccessible by the host. To recover the data, the storage system replaces the logical block address that is inaccessible by the host with a logical block address that is accessible by the host.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.