JPS6428755A - Data block updating system - Google Patents

Data block updating system

Info

Publication number
JPS6428755A
JPS6428755A JP62183722A JP18372287A JPS6428755A JP S6428755 A JPS6428755 A JP S6428755A JP 62183722 A JP62183722 A JP 62183722A JP 18372287 A JP18372287 A JP 18372287A JP S6428755 A JPS6428755 A JP S6428755A
Authority
JP
Japan
Prior art keywords
information
controller
block
updated
disk
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
JP62183722A
Other languages
Japanese (ja)
Inventor
Katsunori Nakamura
Shigeru Kijiro
Yoshiro Shirayanagi
Akira Kurano
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 JP62183722A priority Critical patent/JPS6428755A/en
Publication of JPS6428755A publication Critical patent/JPS6428755A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To rewrite an arbitrary part of information block at high speed by receiving the position, the length and the information of a part to be updated and updating by a disk controller at the time of having an information block updating request from a processor. CONSTITUTION:At the time of having the information block updating request to the controller 4 from the processor 1, the controller 4 inspects whether there is a relevant block in a disk cache memory 5 or not and informs a result to a channel device 3. When it is not stored in the memory 5, according to a command from the informed channel device 3, the entirety of the relevant block in a disk device 6 is updated. When it is stored, the channel device 3 feeds the position and the information of the position and the length of a part to be updated in the relevant block and partial updating information from a main storage device 2 and the controller 4 partly updates the information in the disk cache memory 5. According to this constitution, the transfer of especially unrequired information can be avoided and the information can be partly rewritten at high speed.
JP62183722A 1987-07-24 1987-07-24 Data block updating system Pending JPS6428755A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62183722A JPS6428755A (en) 1987-07-24 1987-07-24 Data block updating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62183722A JPS6428755A (en) 1987-07-24 1987-07-24 Data block updating system

Publications (1)

Publication Number Publication Date
JPS6428755A true JPS6428755A (en) 1989-01-31

Family

ID=16140817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62183722A Pending JPS6428755A (en) 1987-07-24 1987-07-24 Data block updating system

Country Status (1)

Country Link
JP (1) JPS6428755A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023803A1 (en) * 1992-05-21 1993-11-25 Fujitsu Limited Disk array apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023803A1 (en) * 1992-05-21 1993-11-25 Fujitsu Limited Disk array apparatus
US5787460A (en) * 1992-05-21 1998-07-28 Fujitsu Limited Disk array apparatus that only calculates new parity after a predetermined number of write requests
US5954822A (en) * 1992-05-21 1999-09-21 Fujitsu Limited Disk array apparatus that only calculates new parity after a predetermined number of write requests

Similar Documents

Publication Publication Date Title
DE3382179D1 (en) HIERARCHICAL STORAGE SYSTEM WITH SEPARATE CACHE STORAGE FOR DATA AND COMMAND CONTROL.
CA2100094A1 (en) Memory control circuit for use with a copy back cache system
EP0833248A3 (en) Memory update history storing apparatus and method
IL142580A0 (en) Method and apparatus for updating computer code using an integrated circuit interface
EP0285346A3 (en) Cache memory device
DE3874481D1 (en) CONTROL DEVICE FOR BUFFER MEMORY.
ES8801050A1 (en) Interface for direct information transfer.
JPS6428755A (en) Data block updating system
JPS6470858A (en) Data transfer system
JPS6437640A (en) Control system for cache memory
JPS6428756A (en) Buffer control system
JPS5723162A (en) Magnetic disk controller
JPS6476346A (en) Disk cache control system
CA2037578A1 (en) Copying method of system data and copying adaptor
JPS6460896A (en) System for controlling rewrite of data of non-volatile memory device
JPS6421554A (en) Migration control system
JPS57103530A (en) Channel controlling system
JPS57207967A (en) Magnetic tape controller having information updating function
JPS57199062A (en) Disc controller
JPS6448164A (en) Processing end interrupt control system
JPS6467649A (en) File control system
JPS642155A (en) Write controlling method for external memory device
JPS6466764A (en) Adaptor control system
JPS57209525A (en) Access controlling system for channel buffer
JPS6459441A (en) Cash system