Systems and methods for relocation of compressed data tracks
US6751714B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | May 29, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1456
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided to backup, restore and relocate compressed data images, e.g., DASD compressed tracks, associated with virtual storage volumes. A compressed track image of the data is first stored in a storage volume. The data derives from a connected host connected with a control unit that manages the storage volume. When the host data is uncompressed, the control unit compresses the data. In backup, the host reads the compressed data with a read protocol and the control unit assigns metadata to the compressed track. The compressed track is then stored in a backup device, e.g., a tape drive. In restore, the host writes the compressed track to the control unit with a write protocol. If desired, the track is relocated to a different location or to a different storage volume through the associated metadata. In decompression, a seed value is assigned to the data to ensure identification across relocation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.