Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2007-02-20
2007-02-20
Reugh, Brian R. (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S135000, C711S114000, C714S006130, C709S213000, C713S178000
Reexamination Certificate
active
10430856
ABSTRACT:
A method and apparatus for mirroring data stored in a storage device in a mass storage system by caching mirror coherency synchronization operation requests (break mirror and/or snapshot) from the operating system of a server and rapidly sending an acknowledgement to the server that the mirror operation has been completed. Thereafter, the mass storage system performs the flushing and mirroring processes to establish a mirror of the storage device at a time that is appropriate and convenient for the mass storage system to perform such mirroring. To facilitate such a mirror operation at a later time, the mass storage system may utilize a mirror table containing information concerning the mirror request. This information enables the mass storage system to subsequently flush the cache of data that is pertinent to a time before the mirror request occurred. Consequently, the mirror operation only mirrors data that would have been available for mirroring at the time the mirror request was received from the server. In this manner, the servers are not halted to facilitate mirroring and the mass storage system may mirror the storage device at a convenient time.
REFERENCES:
patent: 5819292 (1998-10-01), Hitz et al.
patent: 6038639 (2000-03-01), O'Brien et al.
patent: 6061770 (2000-05-01), Franklin
patent: 6101585 (2000-08-01), Brown et al.
patent: 6182198 (2001-01-01), Hubis et al.
patent: 6216211 (2001-04-01), McBrearty et al.
patent: 6269431 (2001-07-01), Dunham
patent: 6341341 (2002-01-01), Grummon et al.
patent: 6412045 (2002-06-01), DeKoning et al.
patent: 6434681 (2002-08-01), Armangau
patent: 6473775 (2002-10-01), Kusters et al.
patent: 6526487 (2003-02-01), Ohran et al.
patent: 6745294 (2004-06-01), Wilson et al.
patent: 6751715 (2004-06-01), Hubbard et al.
patent: 6948038 (2005-09-01), Berkowitz et al.
patent: 2001/0047412 (2001-11-01), Weinman
patent: 2002/0083037 (2002-06-01), Lewis et al.
patent: 2002/0108017 (2002-08-01), Kenchammana-Hoskote et al.
patent: 2003/0056038 (2003-03-01), Cochran
patent: 2003/0182312 (2003-09-01), Chen et al.
patent: 2003/0182313 (2003-09-01), Federwisch et al.
patent: 2003/0204510 (2003-10-01), Ball et al.
patent: 2003/0212869 (2003-11-01), Burkey
patent: 2003/0212870 (2003-11-01), Nowakowski
patent: 2004/0049634 (2004-03-01), Cochran
patent: 2004/0128470 (2004-07-01), Hetzler et al.
patent: 2004/0186900 (2004-09-01), Nakano et al.
patent: 2004/0210795 (2004-10-01), Anderson
patent: 2005/0004979 (2005-01-01), Berkowitz et al.
patent: 2005/0005070 (2005-01-01), Lam
patent: 2005/0071379 (2005-03-01), Kekre et al.
patent: 2005/0071549 (2005-03-01), Tross et al.
patent: 2005/0160118 (2005-07-01), Berkwitz et al.
patent: 2005/0273555 (2005-12-01), Factor et al.
VERITAS NetBackup 4.0V ServerFree Agent, System Administrator's Guide. Jan. 2001, Veritas, pp. 3-16. Retrieved from http://ftp.support.veritas.com/pub/support/products/NetBackup—DataCenter/NetBackup—AdminGuide—ServerFreeAgent—235045. pdf on Dec. 28, 2005.
Minwen Ji, Alistair Veitch, John Wilkes. “Seneca: Remote Mirroring Done Write”. Proceedings of USENIX Technical Conference (San Antonio, TX), pp. 253-268, Jun. 2003. USENIX, Berkeley, CA.
Diller Jesse
McDermott & Will & Emery
Reugh Brian R.
Xiotech Corporation
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