JPH0237418A - Data matchability control system for storage device - Google Patents

Data matchability control system for storage device

Info

Publication number
JPH0237418A
JPH0237418A JP63185599A JP18559988A JPH0237418A JP H0237418 A JPH0237418 A JP H0237418A JP 63185599 A JP63185599 A JP 63185599A JP 18559988 A JP18559988 A JP 18559988A JP H0237418 A JPH0237418 A JP H0237418A
Authority
JP
Japan
Prior art keywords
data
bit map
fold
write
fold write
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
JP63185599A
Other versions
JP2569135B2 (en
Inventor
Shigeo Honma
Hirofumi Inomata
Hiroyuki Kitajima
Akira Kurano
Takao Sato
Akira Yamamoto
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 JP63185599A priority Critical patent/JP2569135B2/en
Publication of JPH0237418A publication Critical patent/JPH0237418A/en
Application granted granted Critical
Publication of JP2569135B2 publication Critical patent/JP2569135B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Abstract

PURPOSE: To reduce the control table volume and the control program volume and to accept an N-fold write request during troubling by dividing contents stored in a storage device by an arbitrary unit and providing a difference bit map table indicating whether postwrite data reflects on the storage device or not with respect to each unit.
CONSTITUTION: When both of N-fold write and postwrite are designated, data is stored in a cache 4, and respective bits of a difference bit map table 6 corresponding to write destinations of N-fold write storage devices 7 and 8 are set, and respective corresponding bits are cleared when data stored in the cache 4 is written in storage devices 7 and 8. N-fold write and postwrite functions are managed by the difference bit map, and unitary management is possible. Since difference information for all data in N-fold write storage devices 7 and 8 is managed by the difference bit map table 6 in the N-fold write mode, a two-fold write request can be accepted against the trouble, by which data cannot be written in a part of N-fold write storage devices 7 and 8, by reflection on the difference bit map table 6.
COPYRIGHT: (C)1990,JPO&Japio
JP63185599A 1988-07-27 1988-07-27 Data integrity control method of a storage device Expired - Lifetime JP2569135B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63185599A JP2569135B2 (en) 1988-07-27 1988-07-27 Data integrity control method of a storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63185599A JP2569135B2 (en) 1988-07-27 1988-07-27 Data integrity control method of a storage device

Publications (2)

Publication Number Publication Date
JPH0237418A true JPH0237418A (en) 1990-02-07
JP2569135B2 JP2569135B2 (en) 1997-01-08

Family

ID=16173620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63185599A Expired - Lifetime JP2569135B2 (en) 1988-07-27 1988-07-27 Data integrity control method of a storage device

Country Status (1)

Country Link
JP (1) JP2569135B2 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680574A (en) * 1990-02-26 1997-10-21 Hitachi, Ltd. Data distribution utilizing a master disk unit for fetching and for writing to remaining disk units
US5682396A (en) * 1991-01-31 1997-10-28 Hitachi, Ltd. Control unit in storage subsystem with improvement of redundant data updating
US5734812A (en) * 1991-08-20 1998-03-31 Hitachi, Ltd. Storage unit with parity generation function and storage systems using storage unit with parity generation analyzation
US6625705B2 (en) * 1993-04-23 2003-09-23 Emc Corporation Remote data mirroring system having a service processor
US6708252B2 (en) 1996-04-08 2004-03-16 Hitachi, Ltd. Apparatus and method for reallocating logical to physical disk devices using a storage controller, with access frequency and sequential access ratio calculations and display
US6728832B2 (en) 1990-02-26 2004-04-27 Hitachi, Ltd. Distribution of I/O requests across multiple disk units
US6874101B2 (en) 1991-01-31 2005-03-29 Hitachi, Ltd. Storage unit subsystem
US7076620B2 (en) 2003-02-27 2006-07-11 Hitachi, Ltd. Data processing system including storage systems
US7130975B2 (en) 2003-06-27 2006-10-31 Hitachi, Ltd. Data processing system
US7143254B2 (en) 2003-09-09 2006-11-28 Hitachi, Ltd. Remote copy system
US7152079B2 (en) 2003-06-27 2006-12-19 Hitachi, Ltd. Data replication among storage systems
US7159088B2 (en) 2004-08-04 2007-01-02 Hitachi, Ltd. Storage system and data processing system
US7216209B2 (en) 2003-12-15 2007-05-08 Hitachi, Ltd. Data processing system having a plurality of storage systems
SG153625A1 (en) * 2001-01-19 2009-07-29 Seagate Technology Llc Method and apparatus for predicting a head crash in a disc drive

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6631443B1 (en) 1990-02-26 2003-10-07 Hitachi, Ltd. Disk storage system having capability for performing parallel read operation
US5680574A (en) * 1990-02-26 1997-10-21 Hitachi, Ltd. Data distribution utilizing a master disk unit for fetching and for writing to remaining disk units
US6938125B2 (en) 1990-02-26 2005-08-30 Hitachi, Ltd. Storage system with data prefetch function
US5835938A (en) * 1990-02-26 1998-11-10 Hitachi, Ltd. Read/write control for grouped disk storage including parallel access
US6728832B2 (en) 1990-02-26 2004-04-27 Hitachi, Ltd. Distribution of I/O requests across multiple disk units
US6108750A (en) * 1990-02-26 2000-08-22 Hitachi, Ltd. Simultaneous read/write control of data storage disk units
US7254674B2 (en) 1990-02-26 2007-08-07 Hitachi, Ltd. Distribution of I/O requests across multiple disk units
US5917999A (en) * 1991-01-31 1999-06-29 Hitachi, Ltd. Storage unit subsystem
US5682396A (en) * 1991-01-31 1997-10-28 Hitachi, Ltd. Control unit in storage subsystem with improvement of redundant data updating
US6532549B2 (en) 1991-01-31 2003-03-11 Hitachi, Ltd. Storage unit subsystem
US6874101B2 (en) 1991-01-31 2005-03-29 Hitachi, Ltd. Storage unit subsystem
US6145091A (en) * 1991-01-31 2000-11-07 Hitachi, Ltd. Storage unit subsystem
US6757839B2 (en) 1991-01-31 2004-06-29 Hitachi, Ltd. Storage unit subsystem
US7320089B2 (en) 1991-01-31 2008-01-15 Hitachi, Ltd. Storage unit subsystem
US6209107B1 (en) 1991-08-20 2001-03-27 Hitachi, Ltd. Parity storage unit, in a disk array system, for generating updated parity data from received data records
US5734812A (en) * 1991-08-20 1998-03-31 Hitachi, Ltd. Storage unit with parity generation function and storage systems using storage unit with parity generation analyzation
US6473867B2 (en) 1991-08-20 2002-10-29 Hitachi, Ltd. Parity storage unit, in a disk array system, for generating updated parity data from received data records
US6625705B2 (en) * 1993-04-23 2003-09-23 Emc Corporation Remote data mirroring system having a service processor
US6708252B2 (en) 1996-04-08 2004-03-16 Hitachi, Ltd. Apparatus and method for reallocating logical to physical disk devices using a storage controller, with access frequency and sequential access ratio calculations and display
US7069383B2 (en) 1996-04-08 2006-06-27 Hitachi, Ltd. Apparatus and method for reallocating logical to physical disk devices using a storage controller, with access frequency and sequential access ratio calculations and display
US8032733B2 (en) 1996-04-08 2011-10-04 Hitachi, Ltd. Apparatus and method for reallocating logical to physical disk devices using a storage controller with access frequency and sequential access ratio calculations and display
US7577815B2 (en) 1996-04-08 2009-08-18 Hitachi, Ltd. Apparatus and method for reallocating logical to physical disk devices using a storage controller, with access frequency and sequential access ratio calculations and display
US6915382B2 (en) 1996-04-08 2005-07-05 Hitachi, Ltd. Apparatus and method for reallocating logical to physical disk devices using a storage controller, with access frequency and sequential access ratio calculations and display
US8898383B2 (en) 1996-04-08 2014-11-25 Hitachi, Ltd. Apparatus for reallocating logical to physical disk devices using a storage controller and method of the same
SG153625A1 (en) * 2001-01-19 2009-07-29 Seagate Technology Llc Method and apparatus for predicting a head crash in a disc drive
US7076620B2 (en) 2003-02-27 2006-07-11 Hitachi, Ltd. Data processing system including storage systems
US7418565B2 (en) 2003-02-27 2008-08-26 Hitachi, Ltd. Remote e copy system and a remote copy method utilizing multiple virtualization apparatuses
US7130975B2 (en) 2003-06-27 2006-10-31 Hitachi, Ltd. Data processing system
US7152079B2 (en) 2003-06-27 2006-12-19 Hitachi, Ltd. Data replication among storage systems
US7143254B2 (en) 2003-09-09 2006-11-28 Hitachi, Ltd. Remote copy system
US7447855B2 (en) 2003-09-09 2008-11-04 Hitachi, Ltd. Data processing method providing remote copy in a system having first, second, and third storage systems
US8495319B2 (en) 2003-09-09 2013-07-23 Hitachi, Ltd. Data processing system providing remote copy in a system having first, second and third storage systems and establishing first, second and third copy pairs
US8074036B2 (en) 2003-09-09 2011-12-06 Hitachi, Ltd. Data processing system having first, second and third storage systems that are arranged to be changeable between a first status and a second status in response to a predetermined condition at the first storage system
US7216209B2 (en) 2003-12-15 2007-05-08 Hitachi, Ltd. Data processing system having a plurality of storage systems
US7313663B2 (en) 2004-08-04 2007-12-25 Hitachi, Ltd. Storage system and data processing system
US7296126B2 (en) 2004-08-04 2007-11-13 Hitachi, Ltd. Storage system and data processing system
US7159088B2 (en) 2004-08-04 2007-01-02 Hitachi, Ltd. Storage system and data processing system
US7529901B2 (en) 2004-08-04 2009-05-05 Hitachi, Ltd. Storage system and data processing system

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Publication number Publication date
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