CA2112421A1 - Management Apparatus for Volume-Medium Correspondence Information for Use in Dual File System - Google Patents
Management Apparatus for Volume-Medium Correspondence Information for Use in Dual File SystemInfo
- Publication number
- CA2112421A1 CA2112421A1 CA2112421A CA2112421A CA2112421A1 CA 2112421 A1 CA2112421 A1 CA 2112421A1 CA 2112421 A CA2112421 A CA 2112421A CA 2112421 A CA2112421 A CA 2112421A CA 2112421 A1 CA2112421 A1 CA 2112421A1
- Authority
- CA
- Canada
- Prior art keywords
- volume
- correspondence information
- medium correspondence
- medium
- file system
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
- G06F11/2094—Redundant storage or storage space
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/70—Masking faults in memories by using spares or by reconfiguring
- G11C29/74—Masking faults in memories by using spares or by reconfiguring using duplex memories, i.e. using dual copies
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/1658—Data re-synchronization of a redundant component, or initial sync of replacement, additional or spare unit
- G06F11/1662—Data re-synchronization of a redundant component, or initial sync of replacement, additional or spare unit the resynchronized component or unit being a persistent storage device
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
A management apparatus for volume-medium correspondence information for use in a dual file system is disclosed. The apparatus has a volume-medium correspondence information management table for storing and managing volume-medium correspondence information during the operation of the dual file system. A
volume-medium correspondence information storage file stores, after a stop of the dual file system, volume-medium correspondence information which was in the volume-medium correspondence information management table immediately before that system stop. The volume-medium correspondence information is updated in the volume-medium correspondence information management table when the media constituting dual files are to be altered and when the volumes into which the media are to be assembled are to be altered. During the operation of the dual file system, the latest volume-medium correspondence information in the volume-medium correspondence information management table is written into the volume-medium correspondence information storage file.
When the dual file system is to be re-actuated, volume-medium correspondence information stored in the volume-medium correspondence information file is recovered into the volume-medium correspondence information table after the re-actuation. When the dual file system is to be re-actuated, the volumes in an off-line state are provisionally allocated to dual files including a blockaded medium on the basis of the volume-medium correspondence information in the volume-medium correspondence information table recovered.
volume-medium correspondence information storage file stores, after a stop of the dual file system, volume-medium correspondence information which was in the volume-medium correspondence information management table immediately before that system stop. The volume-medium correspondence information is updated in the volume-medium correspondence information management table when the media constituting dual files are to be altered and when the volumes into which the media are to be assembled are to be altered. During the operation of the dual file system, the latest volume-medium correspondence information in the volume-medium correspondence information management table is written into the volume-medium correspondence information storage file.
When the dual file system is to be re-actuated, volume-medium correspondence information stored in the volume-medium correspondence information file is recovered into the volume-medium correspondence information table after the re-actuation. When the dual file system is to be re-actuated, the volumes in an off-line state are provisionally allocated to dual files including a blockaded medium on the basis of the volume-medium correspondence information in the volume-medium correspondence information table recovered.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36061892 | 1992-12-28 | ||
JP360618/1992 | 1992-12-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2112421A1 true CA2112421A1 (en) | 1994-06-29 |
CA2112421C CA2112421C (en) | 1998-08-11 |
Family
ID=18470186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002112421A Expired - Fee Related CA2112421C (en) | 1992-12-28 | 1993-12-24 | Management apparatus for volume-medium correspondence information for use in dual file system |
Country Status (3)
Country | Link |
---|---|
US (1) | US5553233A (en) |
AU (1) | AU673021B2 (en) |
CA (1) | CA2112421C (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2300991B (en) * | 1995-05-15 | 1997-11-05 | Andrew Macgregor Ritchie | Serving signals to browsing clients |
US5983283A (en) * | 1996-04-15 | 1999-11-09 | Sun Microsystems, Inc. | Storage manager independent configuration interface translator and method |
US5953742A (en) * | 1996-07-01 | 1999-09-14 | Sun Microsystems, Inc. | Memory management in fault tolerant computer systems utilizing a first and second recording mechanism and a reintegration mechanism |
US6029179A (en) * | 1997-12-18 | 2000-02-22 | International Business Machines Corporation | Automated read-only volume processing in a virtual tape server |
US7328405B1 (en) | 1998-12-09 | 2008-02-05 | Netscape Communications Corporation | Smart browsing providers |
US7353234B2 (en) | 1998-12-30 | 2008-04-01 | Aol Llc, A Delaware Limited Liability Company | Customized user interface based on user record information |
US7555721B2 (en) * | 1998-12-30 | 2009-06-30 | Aol Llc, A Delaware Limited Liability Company | Customized user interface |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4084231A (en) * | 1975-12-18 | 1978-04-11 | International Business Machines Corporation | System for facilitating the copying back of data in disc and tape units of a memory hierarchial system |
US4807224A (en) * | 1987-08-21 | 1989-02-21 | Naron Steven E | Multicast data distribution system and method |
US5089958A (en) * | 1989-01-23 | 1992-02-18 | Vortex Systems, Inc. | Fault tolerant computer backup system |
US5163148A (en) * | 1989-08-11 | 1992-11-10 | Digital Equipment Corporation | File backup system for producing a backup copy of a file which may be updated during backup |
US5073833A (en) * | 1989-11-13 | 1991-12-17 | International Business Machines Corporation | Dual sector servo system for disk file with separate read and write heads |
US5276867A (en) * | 1989-12-19 | 1994-01-04 | Epoch Systems, Inc. | Digital data storage system with improved data migration |
US5307481A (en) * | 1990-02-28 | 1994-04-26 | Hitachi, Ltd. | Highly reliable online system |
US5202982A (en) * | 1990-03-27 | 1993-04-13 | Sun Microsystems, Inc. | Method and apparatus for the naming of database component files to avoid duplication of files |
US5317728A (en) * | 1990-09-07 | 1994-05-31 | International Business Machines Corporation | Storage management of a first file system using a second file system containing surrogate files and catalog management information |
US5239659A (en) * | 1991-06-19 | 1993-08-24 | Storage Technology Corporation | Phantom duplex copy group apparatus for a disk drive array data storge subsystem |
-
1993
- 1993-12-24 CA CA002112421A patent/CA2112421C/en not_active Expired - Fee Related
- 1993-12-24 AU AU52686/93A patent/AU673021B2/en not_active Ceased
-
1995
- 1995-08-04 US US08/511,098 patent/US5553233A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5553233A (en) | 1996-09-03 |
CA2112421C (en) | 1998-08-11 |
AU673021B2 (en) | 1996-10-24 |
AU5268693A (en) | 1994-07-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20121224 |