System and method for creating and accessing a host-accessible storage entity
US9026495B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2006 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Jan 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a system and method for creating and accessing a copy of one or more host-accessible storage entities contained in a persistent consistency point image (PCPI) of a volume served by a storage system. The storage entity may comprise a file system, logical volume, volume group, or “file system on raw device”. The copy of the storage entity is generated using a logical unit number (lun) copying technique in conjunction with a PCPI table of contents (PTOC). The PTOC contains data describing contents of the PCPI, including luns of the storage entity. The PTOC is written to the volume of the storage system, which is configured to store the luns, i.e., in the context of an active file system, immediately prior to generation of the PCPI. After generation of the PCPI, the PTOC is deleted from the volume such that it is only stored within the PCPI and not within the active file system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.