Disk cache data maintenance system
US5524203A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Oct 20, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1441
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data storage system includes an uninterruptible power supply unit having a small capacity supplies electric power to devices even upon system power failure. Depending on a data write request from a user program, a control program stores the data into a disk cache buffer set in a main storage device. An asynchronous input/output (I/O) task writes the data stored in the disk cache buffer into a file of an external storage device asynchronously with processing of the control program. Upon power failure, the asynchronous I/O task saves the data of the disk cache buffer into a batched saving area of the external storage device, and before initialization of the system upon restoration of the power, the control program writes thus saved data into the file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.