JPS55129917A - Control unit of magnetic tape device - Google Patents

Control unit of magnetic tape device

Info

Publication number
JPS55129917A
JPS55129917A JP3470279A JP3470279A JPS55129917A JP S55129917 A JPS55129917 A JP S55129917A JP 3470279 A JP3470279 A JP 3470279A JP 3470279 A JP3470279 A JP 3470279A JP S55129917 A JPS55129917 A JP S55129917A
Authority
JP
Japan
Prior art keywords
circuit
read
retry
magnetic tape
time
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
JP3470279A
Other languages
Japanese (ja)
Other versions
JPS624766B2 (en
Inventor
Eiji Okamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3470279A priority Critical patent/JPS55129917A/en
Publication of JPS55129917A publication Critical patent/JPS55129917A/en
Publication of JPS624766B2 publication Critical patent/JPS624766B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE: To enhance probability of retry success with a simple circuit constitution, by detecting and storing occurrence of read error to change the driving characteristic of a magnetic tape.
CONSTITUTION: Magnetic tape 6 runs due to DC motor 2, which is subjected to feedback control through capstan control circuit 16, and capstan roller 4, and data is readout by read head 18. Each time read error occurrence is detected through read circuit 20 and control circuit 24, retry is performed by circuit 16, and simultaneously, the retry frequency is stored in retry frequency memory control circuit 32; and when this frequency reaches a prescribed value, the control signal outputted from circuit 32 is changed to change the driving characteristic of motor 2 dependent upon circuit 16. Consequently, even if the recording density is not uniform due to slip, etc., of roller 4 at a write time and change dependent upon time elapse exists between the write time and the read time, read is so controlled that the driving characteristic of the magnetic tape may be changed to drive the tape with a gentle side characteristic, thereby improving probability of retry success to enhance reliability of the tape device.
COPYRIGHT: (C)1980,JPO&Japio
JP3470279A 1979-03-23 1979-03-23 Control unit of magnetic tape device Granted JPS55129917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3470279A JPS55129917A (en) 1979-03-23 1979-03-23 Control unit of magnetic tape device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3470279A JPS55129917A (en) 1979-03-23 1979-03-23 Control unit of magnetic tape device

Publications (2)

Publication Number Publication Date
JPS55129917A true JPS55129917A (en) 1980-10-08
JPS624766B2 JPS624766B2 (en) 1987-01-31

Family

ID=12421686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3470279A Granted JPS55129917A (en) 1979-03-23 1979-03-23 Control unit of magnetic tape device

Country Status (1)

Country Link
JP (1) JPS55129917A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6442117B1 (en) 1991-07-11 2002-08-27 Hitachi, Ltd. Reading/reproducing apparatus having retry arrangement upon failed reading/writing of a signal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3631311B2 (en) * 1995-12-15 2005-03-23 富士通株式会社 Optical disk device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6442117B1 (en) 1991-07-11 2002-08-27 Hitachi, Ltd. Reading/reproducing apparatus having retry arrangement upon failed reading/writing of a signal

Also Published As

Publication number Publication date
JPS624766B2 (en) 1987-01-31

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