JPS643879A - Magnetic tape controller - Google Patents

Magnetic tape controller

Info

Publication number
JPS643879A
JPS643879A JP15854387A JP15854387A JPS643879A JP S643879 A JPS643879 A JP S643879A JP 15854387 A JP15854387 A JP 15854387A JP 15854387 A JP15854387 A JP 15854387A JP S643879 A JPS643879 A JP S643879A
Authority
JP
Japan
Prior art keywords
data
magnetic tape
block
dissidence
flaw
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
JP15854387A
Other languages
Japanese (ja)
Inventor
Yoshiaki Mori
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
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 filed Critical NEC Corp
Priority to JP15854387A priority Critical patent/JPS643879A/en
Publication of JPS643879A publication Critical patent/JPS643879A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To eliminate a waste of a magnetic tape and to improve its utilization efficiency by dividing a data block and rewriting the magnetic tape when two data are compared to detect their dissidence and the counted value of a counter exceeds a reference value. CONSTITUTION:Data of a data processing system 3 is written in a buffer 11 and compared by a comparator 12 with data of the magnetic tape 21, and added to the counter 13. When the comparator detects dissidence and its counted value exceeds the reference value, it is considered that a data block 211 has a flaw 214 and the block is divided into data blocks 212 and 213; and pieces of division information 215 and 216 are added thereto and the block 213 is erased temporarily and rewritten on the tape 21. Therefore, even if trouble such as a flaw is generated at very part of the magnetic tape, the whole area corresponding to one data block is not disabled, so data can be recorded efficiently.
JP15854387A 1987-06-24 1987-06-24 Magnetic tape controller Pending JPS643879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15854387A JPS643879A (en) 1987-06-24 1987-06-24 Magnetic tape controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15854387A JPS643879A (en) 1987-06-24 1987-06-24 Magnetic tape controller

Publications (1)

Publication Number Publication Date
JPS643879A true JPS643879A (en) 1989-01-09

Family

ID=15674005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15854387A Pending JPS643879A (en) 1987-06-24 1987-06-24 Magnetic tape controller

Country Status (1)

Country Link
JP (1) JPS643879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0536215A (en) * 1991-01-22 1993-02-12 Samsung Electron Co Ltd Data recorder and its method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0536215A (en) * 1991-01-22 1993-02-12 Samsung Electron Co Ltd Data recorder and its method

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