JPS5517841A - Magnetic tape device with protecting functions - Google Patents

Magnetic tape device with protecting functions

Info

Publication number
JPS5517841A
JPS5517841A JP8944278A JP8944278A JPS5517841A JP S5517841 A JPS5517841 A JP S5517841A JP 8944278 A JP8944278 A JP 8944278A JP 8944278 A JP8944278 A JP 8944278A JP S5517841 A JPS5517841 A JP S5517841A
Authority
JP
Japan
Prior art keywords
deck
tape
magnetic tape
request
tape device
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
JP8944278A
Other languages
Japanese (ja)
Inventor
Isao Nakada
Kenjiro Goto
Katsuaki Takabori
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 JP8944278A priority Critical patent/JPS5517841A/en
Publication of JPS5517841A publication Critical patent/JPS5517841A/en
Pending legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE: To protect a magnetic tape device accessed for plural CPUs by receiving I/O requests from CPUs according to the starting mark position of a tape.
CONSTITUTION: Register 7 for storing CPU1 or CPU2, which uses the deck of magnetic tape device 5, is equipped correspondingly to the deck. Only when the tape of deck is placed on the position of tape staring mark or register 7 corresponding to the deck indicates CPU which outputted an I/O request, the I/O request from each CPU is received. When the tape of deck is not placed on the position of tape starting mark and register 7 corresponding to the deck does not indicates CPU which outputted I/O request, the I/O request is not received.
COPYRIGHT: (C)1980,JPO&Japio
JP8944278A 1978-07-24 1978-07-24 Magnetic tape device with protecting functions Pending JPS5517841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8944278A JPS5517841A (en) 1978-07-24 1978-07-24 Magnetic tape device with protecting functions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8944278A JPS5517841A (en) 1978-07-24 1978-07-24 Magnetic tape device with protecting functions

Publications (1)

Publication Number Publication Date
JPS5517841A true JPS5517841A (en) 1980-02-07

Family

ID=13970785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8944278A Pending JPS5517841A (en) 1978-07-24 1978-07-24 Magnetic tape device with protecting functions

Country Status (1)

Country Link
JP (1) JPS5517841A (en)

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