JPS5463646A - Shared input/output device - Google Patents
Shared input/output deviceInfo
- Publication number
- JPS5463646A JPS5463646A JP13007177A JP13007177A JPS5463646A JP S5463646 A JPS5463646 A JP S5463646A JP 13007177 A JP13007177 A JP 13007177A JP 13007177 A JP13007177 A JP 13007177A JP S5463646 A JPS5463646 A JP S5463646A
- Authority
- JP
- Japan
- Prior art keywords
- occupier
- resource
- higher device
- port
- occupiers
- 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.)
- Granted
Links
Abstract
PURPOSE: To improve reliability of devices by storing beforehand a higher device which occupies and uses the resource of a higher device instead of this higher device when a trouble occurs in this higher device and inhibiting occupiers other than the next one from using the resource at a bus switching time.
CONSTITUTION: When detecting the trouble of I/O channel CHO/port CPO, I/O controller IOC determines newly a port which becomes the occupier of I/O device DEVO. In this case, port CP1 is beforehand stored as the next occupier and is defin- ed as a current occupier, and the occupier which has been defined as a current occupier until now is defined as the next occupier. As a result, occupiers other than the next occupier can be inhibited from using the resource at a bus switching time, and reliability of devices can be improved.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13007177A JPS5463646A (en) | 1977-10-29 | 1977-10-29 | Shared input/output device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13007177A JPS5463646A (en) | 1977-10-29 | 1977-10-29 | Shared input/output device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5463646A true JPS5463646A (en) | 1979-05-22 |
JPS6127793B2 JPS6127793B2 (en) | 1986-06-27 |
Family
ID=15025294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13007177A Granted JPS5463646A (en) | 1977-10-29 | 1977-10-29 | Shared input/output device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5463646A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63208924A (en) * | 1987-02-26 | 1988-08-30 | Hitachi Ltd | Multiplex volume control system |
JPH0619625A (en) * | 1993-05-14 | 1994-01-28 | Hitachi Ltd | Multiple control system for magnetic disk |
-
1977
- 1977-10-29 JP JP13007177A patent/JPS5463646A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63208924A (en) * | 1987-02-26 | 1988-08-30 | Hitachi Ltd | Multiplex volume control system |
JPH0619625A (en) * | 1993-05-14 | 1994-01-28 | Hitachi Ltd | Multiple control system for magnetic disk |
Also Published As
Publication number | Publication date |
---|---|
JPS6127793B2 (en) | 1986-06-27 |
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