JPS55112662A - Input and output unit - Google Patents

Input and output unit

Info

Publication number
JPS55112662A
JPS55112662A JP1834779A JP1834779A JPS55112662A JP S55112662 A JPS55112662 A JP S55112662A JP 1834779 A JP1834779 A JP 1834779A JP 1834779 A JP1834779 A JP 1834779A JP S55112662 A JPS55112662 A JP S55112662A
Authority
JP
Japan
Prior art keywords
media
usage
time
stored
input
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
Application number
JP1834779A
Other languages
Japanese (ja)
Inventor
Fumio Yoshimura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1834779A priority Critical patent/JPS55112662A/en
Publication of JPS55112662A publication Critical patent/JPS55112662A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase the system performance, by storing the usage time information of each access medium to the respective memory areas, and by controlling the unit so that the rate of usage of the media can almost be equal based on the measured time.
CONSTITUTION: In controlling access media of the hierarchy construction input and output unit, in the input and output control unit 4', when the access media 7a...7c controlled are started for use, the microprocessor 14 starts the timing circuit 15 and the time TS is read out and it is stored to the corresponded usage time memory acreas 17a...17c. Further, at the end of use of the media 7a...7c, the processor 14 reads out the time TE and it is stored in the corresponded usage time memory area. Thus, the usage time information of the media 7a...7c is stored in the memory areas 17a...17c, and when the data shift on the data memory medium 5 is required, based on the measured time, control is made so that the usage rate of the media 7a...7c can almost be equal, to increase the system performance.
COPYRIGHT: (C)1980,JPO&Japio
JP1834779A 1979-02-21 1979-02-21 Input and output unit Pending JPS55112662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1834779A JPS55112662A (en) 1979-02-21 1979-02-21 Input and output unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1834779A JPS55112662A (en) 1979-02-21 1979-02-21 Input and output unit

Publications (1)

Publication Number Publication Date
JPS55112662A true JPS55112662A (en) 1980-08-30

Family

ID=11969125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1834779A Pending JPS55112662A (en) 1979-02-21 1979-02-21 Input and output unit

Country Status (1)

Country Link
JP (1) JPS55112662A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02140845A (en) * 1988-11-21 1990-05-30 Nec Corp Automatic reference system
JPH04241647A (en) * 1990-08-28 1992-08-28 Internatl Business Mach Corp <Ibm> Device and method of controlling storage capacity
JPH0659957A (en) * 1991-06-27 1994-03-04 Digital Equip Corp <Dec> Filing system for storing data and method for allocating memory space

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02140845A (en) * 1988-11-21 1990-05-30 Nec Corp Automatic reference system
JPH04241647A (en) * 1990-08-28 1992-08-28 Internatl Business Mach Corp <Ibm> Device and method of controlling storage capacity
JPH0659957A (en) * 1991-06-27 1994-03-04 Digital Equip Corp <Dec> Filing system for storing data and method for allocating memory space

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