JPH036614A - Magnetic disk controller - Google Patents

Magnetic disk controller

Info

Publication number
JPH036614A
JPH036614A JP1141461A JP14146189A JPH036614A JP H036614 A JPH036614 A JP H036614A JP 1141461 A JP1141461 A JP 1141461A JP 14146189 A JP14146189 A JP 14146189A JP H036614 A JPH036614 A JP H036614A
Authority
JP
Japan
Prior art keywords
data
magnetic disk
physical device
device number
physical
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
JP1141461A
Other languages
Japanese (ja)
Inventor
Tatsuji Okubo
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 JP1141461A priority Critical patent/JPH036614A/en
Publication of JPH036614A publication Critical patent/JPH036614A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the transformation of data by reading the data when the coincidence is obtained between the physical device number of a magnetic disk device which is written by a data writing means with the physical device number of the magnetic disk device which is pointed by a reading instruction issued from a host device.
CONSTITUTION: A microprocessor circuit 30 compares the physical device number received from a physical device number storage circuit 60 with the physical device number received from a magnetic disk control circuit 20 via a physical device number comparator 50. When the coincidence is obtained between both device numbers, the data written after the physical device numbers are read out as the read data and sent to a bus control circuit 10, a bus 300, and a main storage 500. Thus it is possible to prevent such a case where a host device reads data out of an undesired magnetic disk device 200, i.e., the transformation of data.
COPYRIGHT: (C)1991,JPO&Japio
JP1141461A 1989-06-02 1989-06-02 Magnetic disk controller Pending JPH036614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1141461A JPH036614A (en) 1989-06-02 1989-06-02 Magnetic disk controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1141461A JPH036614A (en) 1989-06-02 1989-06-02 Magnetic disk controller

Publications (1)

Publication Number Publication Date
JPH036614A true JPH036614A (en) 1991-01-14

Family

ID=15292425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1141461A Pending JPH036614A (en) 1989-06-02 1989-06-02 Magnetic disk controller

Country Status (1)

Country Link
JP (1) JPH036614A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003201309B2 (en) * 2002-03-18 2007-05-24 Elmex Limited Swab Testing Device and Method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003201309B2 (en) * 2002-03-18 2007-05-24 Elmex Limited Swab Testing Device and Method

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