Data compression method and structure for a direct access storage device
US5623701A · kind A · utility
109Cited by
18References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99942
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data compression method and compression data structure are provided for a direct access storage device (DASD). The DASD is segmented into a plurality of compression groups. Each of the compression groups has a fixed logical size. A directory table is written within each of the compression groups. Each compression group has at least one compressed data region on which compressed data can be written and an exception region on which compressed data exceptions can be written. The compressed data exceptions include updated compressed data which exceeds an original storage space for corresponding original compressed data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.