JPS6470961A - System for controlling hard disk device - Google Patents

System for controlling hard disk device

Info

Publication number
JPS6470961A
JPS6470961A JP22765887A JP22765887A JPS6470961A JP S6470961 A JPS6470961 A JP S6470961A JP 22765887 A JP22765887 A JP 22765887A JP 22765887 A JP22765887 A JP 22765887A JP S6470961 A JPS6470961 A JP S6470961A
Authority
JP
Japan
Prior art keywords
flag
area
accessed
defective part
access
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
JP22765887A
Other languages
Japanese (ja)
Inventor
Juichi Akita
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 JP22765887A priority Critical patent/JPS6470961A/en
Publication of JPS6470961A publication Critical patent/JPS6470961A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To shorten an access time by reading a flag to display the existence and position of a defective part from a magnetic disk device and preventing checking whether an access area is the defective part or not when the flag is off. CONSTITUTION:Before magnetic disk devices 41-4n are accessed, all flags F are read, a flag table 9 is prepared by a flag table preparing circuit 8, and the table is stored in a main storage device 2. When the devices 41-4n are accessed, the flag F corresponding to the accessed area is supplied from the flag table 9 in the device 2 to a flag confirming circuit 7. When the flag is off, a control circuit 5 considers that the defective part does not exist in the area, accesses the area, executes a reading or a writing, and does not check whether the access area is the defective area or not. On the other hand, when the flag is on, before the access, home address defect information SD and the address of the area to be accessed are compared, and whether the area is the defective part or not is checked.
JP22765887A 1987-09-11 1987-09-11 System for controlling hard disk device Pending JPS6470961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22765887A JPS6470961A (en) 1987-09-11 1987-09-11 System for controlling hard disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22765887A JPS6470961A (en) 1987-09-11 1987-09-11 System for controlling hard disk device

Publications (1)

Publication Number Publication Date
JPS6470961A true JPS6470961A (en) 1989-03-16

Family

ID=16864311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22765887A Pending JPS6470961A (en) 1987-09-11 1987-09-11 System for controlling hard disk device

Country Status (1)

Country Link
JP (1) JPS6470961A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0926859A (en) * 1995-07-10 1997-01-28 Nec Corp Disk volume duplex system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62248171A (en) * 1986-04-22 1987-10-29 Nec Corp Errored track substituting method for magnetic disk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62248171A (en) * 1986-04-22 1987-10-29 Nec Corp Errored track substituting method for magnetic disk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0926859A (en) * 1995-07-10 1997-01-28 Nec Corp Disk volume duplex system

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