JPS5463646A - Shared input/output device - Google Patents

Shared input/output device

Info

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
Application number
JP13007177A
Other languages
Japanese (ja)
Other versions
JPS6127793B2 (en
Inventor
Yoshio Hamaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13007177A priority Critical patent/JPS5463646A/en
Publication of JPS5463646A publication Critical patent/JPS5463646A/en
Publication of JPS6127793B2 publication Critical patent/JPS6127793B2/ja
Granted legal-status Critical Current

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
JP13007177A 1977-10-29 1977-10-29 Shared input/output device Granted JPS5463646A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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