Storing information in otherwise unused space in VTOC and VVDS for recovery of data
US7783609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Feb 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When a VTOC and a VVDS are established for information used to access data sets of a volume, unused space remains in both structures. The data sets, VTOC and VVDS are stored on a recordable medium. For VSAM data sets, other, vital information about the data set is also stored in the VTOC; for non-VSAM data sets, vital information about the data set is also stored in the VVDS. If the VOTC entry of a non-VSAM data set becomes corrupted, the vital information in the VVDS may be used to access the stored data set. Similarly, If the VVDS entry of a VSAM data set becomes corrupted, the vital information in the VTOC may be used to access the stored data set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.