JPS6428755A - Data block updating system - Google Patents
Data block updating systemInfo
- Publication number
- JPS6428755A JPS6428755A JP62183722A JP18372287A JPS6428755A JP S6428755 A JPS6428755 A JP S6428755A JP 62183722 A JP62183722 A JP 62183722A JP 18372287 A JP18372287 A JP 18372287A JP S6428755 A JPS6428755 A JP S6428755A
- Authority
- JP
- Japan
- Prior art keywords
- information
- controller
- block
- updated
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To rewrite an arbitrary part of information block at high speed by receiving the position, the length and the information of a part to be updated and updating by a disk controller at the time of having an information block updating request from a processor. CONSTITUTION:At the time of having the information block updating request to the controller 4 from the processor 1, the controller 4 inspects whether there is a relevant block in a disk cache memory 5 or not and informs a result to a channel device 3. When it is not stored in the memory 5, according to a command from the informed channel device 3, the entirety of the relevant block in a disk device 6 is updated. When it is stored, the channel device 3 feeds the position and the information of the position and the length of a part to be updated in the relevant block and partial updating information from a main storage device 2 and the controller 4 partly updates the information in the disk cache memory 5. According to this constitution, the transfer of especially unrequired information can be avoided and the information can be partly rewritten at high speed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62183722A JPS6428755A (en) | 1987-07-24 | 1987-07-24 | Data block updating system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62183722A JPS6428755A (en) | 1987-07-24 | 1987-07-24 | Data block updating system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6428755A true JPS6428755A (en) | 1989-01-31 |
Family
ID=16140817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62183722A Pending JPS6428755A (en) | 1987-07-24 | 1987-07-24 | Data block updating system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6428755A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993023803A1 (en) * | 1992-05-21 | 1993-11-25 | Fujitsu Limited | Disk array apparatus |
-
1987
- 1987-07-24 JP JP62183722A patent/JPS6428755A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993023803A1 (en) * | 1992-05-21 | 1993-11-25 | Fujitsu Limited | Disk array apparatus |
US5787460A (en) * | 1992-05-21 | 1998-07-28 | Fujitsu Limited | Disk array apparatus that only calculates new parity after a predetermined number of write requests |
US5954822A (en) * | 1992-05-21 | 1999-09-21 | Fujitsu Limited | Disk array apparatus that only calculates new parity after a predetermined number of write requests |
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