1996-05-28
1998-04-21
Asta, Frank J.
Excavating
39518203, 39518204, 395488, 395492, 395821, 371 101, 371 211, 371 401, 364DIG1, G06F 1216
Patent
active
057427925
ABSTRACT:
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a remotely mirrored volume pair. Normally, a host computer directly accesses either a local or a primary volume, and data written to a primary volume is automatically sent over the link to a corresponding secondary volume. Each remotely mirrored volume pair can operate in a selected synchronization mode including synchronous, semi-synchronous, adaptive copy - remote write pending, and adaptive copy - disk. Direct write access to a secondary volume is denied if a "sync required" attribute is set for the volume and the volume is not synchronized. If a "volume domino" mode is enabled for a remotely mirrored volume pair, access to a volume of the pair is denied when the other volume is inaccessible. In a "links domino" mode, access to all remotely mirrored volumes is denied when remote mirroring is disrupted by an all-links failure. The domino modes can be used to initiate application-based recovery, for example, recovering a secondary data file using a secondary log file. In an active migration mode, host processing of a primary volume is concurrent with migration to a secondary volume. In an overwrite cache mode, remote write-pending data in cache can be overwritten. Write data for an entire host channel command word chain is bundled in one link transmission.
REFERENCES:
patent: 3588839 (1971-06-01), Belady et al.
patent: 3835260 (1974-09-01), Prescher et al.
patent: 3866182 (1975-02-01), Yamada et al.
patent: 4020466 (1977-04-01), Cordi et al.
patent: 4057849 (1977-11-01), Ying et al.
patent: 4084231 (1978-04-01), Capozzi et al.
patent: 4094000 (1978-06-01), Brudevold
patent: 4124843 (1978-11-01), Bramson et al.
patent: 4150429 (1979-04-01), Ying
patent: 4161777 (1979-07-01), Behnase et al.
patent: 4204251 (1980-05-01), Brudevold
patent: 4342079 (1982-07-01), Stewart et al.
patent: 4396984 (1983-08-01), Videki, II
patent: 4430727 (1984-02-01), Moore et al.
patent: 4453215 (1984-06-01), Reid
patent: 4464713 (1984-08-01), Benhase et al.
patent: 4577272 (1986-03-01), Ballew et al.
patent: 4608688 (1986-08-01), Hanson et al.
patent: 4634100 (1987-01-01), Julich et al.
patent: 4698808 (1987-10-01), Ishii
patent: 4710870 (1987-12-01), Blackwell et al.
patent: 4755928 (1988-07-01), Johnson et al.
patent: 4769764 (1988-09-01), Levanon
patent: 4779189 (1988-10-01), Legvold et al.
patent: 4783834 (1988-11-01), Anderson et al.
patent: 4785472 (1988-11-01), Shapiro
patent: 4797750 (1989-01-01), Karweit
patent: 4805106 (1989-02-01), Pfeifer
patent: 4814592 (1989-03-01), Bradt et al.
patent: 4837680 (1989-06-01), Crockett et al.
patent: 4849978 (1989-07-01), Dishon et al.
patent: 4862411 (1989-08-01), Dishon et al.
patent: 4916605 (1990-04-01), Beardsley et al.
patent: 4949187 (1990-08-01), Cohen
patent: 4985695 (1991-01-01), Wilkinson et al.
patent: 5007053 (1991-04-01), Iyer et al.
patent: 5029199 (1991-07-01), Jones et al.
patent: 5051887 (1991-09-01), Berger et al.
patent: 5060185 (1991-10-01), Naito et al.
patent: 5089958 (1992-02-01), Horton et al.
patent: 5097439 (1992-03-01), Partriquin et al.
patent: 5099485 (1992-03-01), Bruckert et al.
patent: 5123099 (1992-06-01), Shibata et al.
patent: 5127048 (1992-06-01), Press et al.
patent: 5132787 (1992-07-01), Omi et al.
patent: 5134711 (1992-07-01), Asthana et al.
patent: 5146576 (1992-09-01), Beardsley et al.
patent: 5146605 (1992-09-01), Beukema et al.
patent: 5155814 (1992-10-01), Beardsley et al.
patent: 5155835 (1992-10-01), Belsan
patent: 5155845 (1992-10-01), Beal et al.
patent: 5157770 (1992-10-01), Beardsley et al.
patent: 5159671 (1992-10-01), Iwami
patent: 5170471 (1992-12-01), Bonevento et al.
patent: 5175837 (1992-12-01), Arnold et al.
patent: 5175839 (1992-12-01), Ikeda et al.
patent: 5185864 (1993-02-01), Bonevento et al.
patent: 5201053 (1993-04-01), Benhase et al.
patent: 5202887 (1993-04-01), Ueno et al.
patent: 5206939 (1993-04-01), Yanai et al.
patent: 5210865 (1993-05-01), Davis et al.
patent: 5235690 (1993-08-01), Beardsley et al.
patent: 5235692 (1993-08-01), Ayres et al.
patent: 5239659 (1993-08-01), Rudeseal et al.
patent: 5263154 (1993-11-01), Eastridge et al.
patent: 5269011 (1993-12-01), Yanai et al.
patent: 5274645 (1993-12-01), Idelman et al.
patent: 5276867 (1994-01-01), Kenley et al.
patent: 5285451 (1994-02-01), Henson et al.
patent: 5313664 (1994-05-01), Sugiyama et al.
patent: 5335352 (1994-08-01), Yanai et al.
patent: 5343477 (1994-08-01), Yamada
patent: 5375232 (1994-12-01), Legvold et al.
patent: 5377342 (1994-12-01), Sakai et al.
patent: 5379412 (1995-01-01), Eastridge et al.
patent: 5381539 (1995-01-01), Yanai et al.
patent: 5428796 (1995-06-01), Iskiyan et al.
patent: 5446872 (1995-08-01), Ayres et al.
patent: 5459857 (1995-10-01), Ludlam et al.
patent: 5463752 (1995-10-01), Behnase et al.
patent: 5544345 (1996-08-01), Carpenter et al.
patent: 5544347 (1996-08-01), Yanai et al.
SFT Netware 286 Maintenance, #100-313-001, 100/Rev1.00, Novel Incorporated, Provo, Utah, Nov. 1987.
SFT Netware 286 Installation, #100-312-001, 100/Rev1.00, Novel Incorporated, Provo, Utah, Nov. 1987.
SFT Netware 286 Installation Supplement, #100-000225-001, 26/Rev1.02, Novel Incorporated, Provo, Utah, June 1986.
SFT Netware 68 Maintenance, #100-000289-001, 64/Rev1.00, Novel Incorporated, Provo, Utah, Nov. 1986.
SFT Netware 68 Installation, #100-000317-001, 103/Rev1.00, Novel Incorporated, Provo, Utah, Feb. 1988.
SFT Netware 868 Installation Supplement, #100-000286-001, 61/Rev1.00, Novel Incorporated, Provo, Utah, Dec. 1986.
D.L. Burkes & R.K. Treiber, "Design Approaches for Real-Time Transaction Processing Remote Site Recovery," Computer Society International Conference (COMPCON), Spring Meeting, Los Alamitos, Feb. 26-Mar. 2, 1990, No., CONF. 35, 23 Feb. 1990, Institute of Electrical and Electronics Engineers, New York, N.Y., pp. 568-572.
Supplementary European Search Report for EP 94 91 4223, Jul. 1, 1997.
International Search Report for PCT/US/94/04326, Jul. 20, 1994.
PCT Written Opinion for PCT/US94/04326, 28 Feb. 1995.
PCT International Preliminary Examination Report for PCT/US94/04326, Jul. 18, 1995.
Hank Cote-New Horizons in Accessing Large Amounts of On-Line Data, pp. 71-75, 1982.
Matt Kramer-Fault-Tolerant LANs Guard Against Malfunction, Data Loss, pp. C26-C35, Sep. 1987.
Carol Grossman-Planning for 3990 Extended Functions, pp. 245-258, 1989, 30th Annual GUIDE Conference.
Bob Buchanan-Administrative Error Causes Most Major System Failures (3 pgs.), Feb. 1988, Goverment Computer News, V. 17, N. 4, p. 340.
Virginia Dudek-Planning for Network Disasters (4 pgs.), Jun. 12, 1989, MIS Week, vol. 10, N. 24.
Jean Bozman-Escon An Aid To Remote Disks (3 pgs.), V. 25, N. 1, p. 29, Jan. 7, 1991.
Gary A. Boles-A RAID Stack: Micropolis RAIDION, Network Computer, Jun. 1992.
Blaine Homer-RAID Level 5 Protects Your Data With Interleaved Parity, LAN Times, May 25, 1992, vol. 9.
Michael Caton-Micropolis Array Secures Data, PC Week, 1992.
RAIDON Fault-Tolerant Disk Arrays Brochure, 1993.
Storagetek 2Q Earnings Down, Iceberg Ready for Testing by Jim Mallory, Newsbytes, Jul. 15, 1993.
Network Backup Evolves, by Michael Peterson et al., PC Magazine, vol. 12, No. 16, Sep. 28, 1993, p. 277(18).
Your Next LAN Storage Could Be a Mainframe, Jeff Moad, Datamination, vol. 39, No. 6, Mar. 15, 1993, p. 71.
Heard Any Good Rumors Lately? (Network Management), By Jill Huntington-Lee, LAN Computing, vol. 5, No. 2, Feb. 1994, p. 22.
Special Report: The AT&T Worldwide Intelligent Network-Scope, Nature and Management, Edge, vol. 7, No. 224, Nov. 6, 1992, p. 9.
Protect Your Data| (Database Report), by Michael Liczbanski, Data Based Advisor, vol. 10, No. 5, May 1992, p. 114.
Network Planning to the Rescue; Network Managers Should Design and Test a Network Recovery Plan That Lets Business Continue Uninterrupted Even If Disaster Strikes, by Ramond W. Rudnitskas et al., Networking Management, vol. 9, No. 11, Oct. 1991, p. 46.
If LANS Eye Host Status, Quality Today Falls
Alterescu Bruno
Castel Daniel D. C.
Ofek Yuval Y. O.
Shklarsky Gadi G.
Vishlitzky Natan
Asta Frank J.
EMC Corporation
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