Patent
1994-10-13
1997-07-15
Harvey, Jack B.
395489, 395488, 39518203, 39518204, G06F 1200, G06F 1208
Patent
active
056491522
ABSTRACT:
A system and method for providing a static snapshot, or image, of data stored on a mass storage system are disclosed. First, a preservation memory is cleared and a virtual device is created. Whenever a write is to be performed on the mass storage system, a check is made of the preservation memory to determine if it contains a block associated with the mass storage write address. If there is not, a copy of the block in the mass storage system at the block write address is placed in the preservation memory. Whenever a read is to be performed on the virtual device, a check is made of the preservation memory to determine if it contains a block associated with the virtual device read address. If there is such a block, that block is returned as the result of the virtual device read. Otherwise, the block at the virtual device block read address is returned as the result.
REFERENCES:
patent: 3054560 (1962-09-01), Hartley
patent: 3303474 (1967-02-01), Moore et al.
patent: 3444528 (1969-05-01), Lovell et al.
patent: 3533082 (1970-10-01), Schnabel et al.
patent: 3544477 (1970-12-01), Heller
patent: 3557315 (1971-01-01), Kobus et al.
patent: 3602900 (1971-08-01), Delaigue et al.
patent: 3623014 (1971-11-01), Doelz et al.
patent: 3636331 (1972-01-01), Amrehn
patent: 3665173 (1972-05-01), Bouricius et al.
patent: 3681578 (1972-08-01), Stevens
patent: 3725861 (1973-04-01), Hancock
patent: 3735356 (1973-05-01), Yates
patent: 3754211 (1973-08-01), Rocher et al.
patent: 3760364 (1973-09-01), Yamauchi et al.
patent: 3761884 (1973-09-01), Avsan et al.
patent: 3771137 (1973-11-01), Barner et al.
patent: 3803568 (1974-04-01), Higashide
patent: 3810119 (1974-05-01), Zieve et al.
patent: 3810121 (1974-05-01), Chang et al.
patent: 3812469 (1974-05-01), Hauck et al.
patent: 3820085 (1974-06-01), Zelinski
patent: 3824547 (1974-07-01), Green et al.
patent: 3828321 (1974-08-01), Wilber et al.
patent: 3864670 (1975-02-01), Inoue et al.
patent: 3865999 (1975-02-01), Spitaels
patent: 3889237 (1975-06-01), Alferness et al.
patent: 3959638 (1976-05-01), Blum et al.
patent: 4012717 (1977-03-01), Censler et al.
patent: 4051461 (1977-09-01), Hashimoto et al.
patent: 4073005 (1978-02-01), Parkin
patent: 4076961 (1978-02-01), Holsinger et al.
patent: 4099241 (1978-07-01), Ossfeldt
patent: 4118772 (1978-10-01), Takada
patent: 4141066 (1979-02-01), Keiles
patent: 4152764 (1979-05-01), Conners et al.
patent: 4156901 (1979-05-01), Haraden et al.
patent: 4159517 (1979-06-01), Paradine et al.
patent: 4164017 (1979-08-01), Randall
patent: 4191996 (1980-03-01), Chesley
patent: 4208715 (1980-06-01), Kumahara et al.
patent: 4228503 (1980-10-01), Waite et al.
patent: 4257009 (1981-03-01), Yorkanis
patent: 4270167 (1981-05-01), Koehler et al.
patent: 4282572 (1981-08-01), Moore, III et al.
patent: 4318173 (1982-03-01), Freedman et al.
patent: 4332027 (1982-05-01), Malcolm et al.
patent: 4351023 (1982-09-01), Richer
patent: 4358823 (1982-11-01), McDonald et al.
patent: 4359718 (1982-11-01), Payen
patent: 4371754 (1983-02-01), De et al.
patent: 4378588 (1983-03-01), Katzman et al.
patent: 4380047 (1983-04-01), Eisenhard et al.
patent: 4380067 (1983-04-01), Beardsley et al.
patent: 4402046 (1983-08-01), Cox et al.
patent: 4403286 (1983-09-01), Fry et al.
patent: 4403303 (1983-09-01), Howes et al.
patent: 4423414 (1983-12-01), Bryant et al.
patent: 4428044 (1984-01-01), Liron
patent: 4430699 (1984-02-01), Segarra et al.
patent: 4434487 (1984-02-01), Rubinson et al.
patent: 4439859 (1984-03-01), Donnan
patent: 4445214 (1984-04-01), Reynolds et al.
patent: 4453215 (1984-06-01), Reid
patent: 4455601 (1984-06-01), Griscom et al.
patent: 4455645 (1984-06-01), Mijioka et al.
patent: 4459658 (1984-07-01), Gabbe et al.
patent: 4471429 (1984-09-01), Porter et al.
patent: 4477882 (1984-10-01), Schumacher et al.
patent: 4477895 (1984-10-01), Casper et al.
patent: 4479214 (1984-10-01), Ryan
patent: 4480304 (1984-10-01), Carr et al.
patent: 4483001 (1984-11-01), Ryan
patent: 4484275 (1984-11-01), Katzman et al.
patent: 4486826 (1984-12-01), Wolff et al.
patent: 4498145 (1985-02-01), Baker et al.
patent: 4507751 (1985-03-01), Gawlick et al.
patent: 4516121 (1985-05-01), Moriyama et al.
patent: 4521847 (1985-06-01), Ziehm et al.
patent: 4530051 (1985-07-01), Johnson et al.
patent: 4530052 (1985-07-01), King et al.
patent: 4562535 (1985-12-01), Vincent et al.
patent: 4581701 (1986-04-01), Hess et al.
patent: 4583089 (1986-04-01), Cope
patent: 4589090 (1986-05-01), Downing et al.
patent: 4590554 (1986-05-01), Glazer et al.
patent: 4604690 (1986-08-01), Crabtree
patent: 4607365 (1986-08-01), Greig et al.
patent: 4608688 (1986-08-01), Hansen et al.
patent: 4610013 (1986-09-01), Long et al.
patent: 4615001 (1986-09-01), Hudgins et al.
patent: 4623883 (1986-11-01), Konen
patent: 4628508 (1986-12-01), Sager et al.
patent: 4630224 (1986-12-01), Sollman
patent: 4639852 (1987-01-01), Motomiya
patent: 4639856 (1987-01-01), Hrustich et al.
patent: 4644470 (1987-02-01), Feigenbaum et al.
patent: 4646300 (1987-02-01), Goodman et al.
patent: 4648031 (1987-03-01), Jenner
patent: 4648061 (1987-03-01), Foster
patent: 4652940 (1987-03-01), Sumiyoshi
patent: 4654819 (1987-03-01), Stiffler
patent: 4654846 (1987-03-01), Goodwin et al.
patent: 4654857 (1987-03-01), Samson et al.
patent: 4656596 (1987-04-01), Thaden et al.
patent: 4674038 (1987-06-01), Brelsford et al.
patent: 4680581 (1987-07-01), Kozlik et al.
patent: 4691314 (1987-09-01), Bergins et al.
patent: 4703421 (1987-10-01), Abrant et al.
patent: 4703481 (1987-10-01), Fremont
patent: 4713811 (1987-12-01), Frey
patent: 4727516 (1988-02-01), Yoshida et al.
patent: 4736339 (1988-04-01), Crabbe, Jr.
patent: 4740969 (1988-04-01), Fremont
patent: 4750177 (1988-06-01), Hendrie et al.
patent: 4754397 (1988-06-01), Varaiya et al.
patent: 4800488 (1989-01-01), Agrawal et al.
patent: 4823256 (1989-04-01), Bishop et al.
patent: 4866707 (1989-09-01), Marshall et al.
patent: 4878167 (1989-10-01), Kapulka et al.
patent: 4941087 (1990-07-01), Kap
patent: 4953122 (1990-08-01), Williams
patent: 4959768 (1990-09-01), Gerhart
patent: 4959774 (1990-09-01), Davis
patent: 4979108 (1990-12-01), Crabbe, Jr.
patent: 5005122 (1991-04-01), Griffin et al.
patent: 5038278 (1991-08-01), Steely, Jr. et al.
patent: 5060185 (1991-10-01), Naito et al.
patent: 5079740 (1992-01-01), Patel et al.
patent: 5086502 (1992-02-01), Malcolm
patent: 5123099 (1992-06-01), Shibata et al.
patent: 5157663 (1992-10-01), Major et al.
patent: 5235700 (1993-08-01), Alaiwan et al.
patent: 5276867 (1994-01-01), Kenley et al.
patent: 5295258 (1994-03-01), Jewett et al.
patent: 5307481 (1994-04-01), Shimazaki et al.
patent: 5343477 (1994-08-01), Yamada
patent: 5403639 (1995-04-01), Belsan et al.
patent: 5410667 (1995-04-01), Belsan et al.
patent: 5426747 (1995-06-01), Weinreb et al.
patent: 5435004 (1995-07-01), Cox et al.
patent: 5455932 (1995-10-01), Major et al.
patent: 5513314 (1996-04-01), Kandasamy et al.
patent: 5515502 (1996-05-01), Wood
patent: 5530855 (1996-06-01), Satoh et al.
patent: 5537533 (1996-07-01), Staheli et al.
patent: 5537585 (1996-07-01), Blickenstaff et al.
patent: 5544347 (1996-08-01), Yanai et al.
Lyon, J. "Tandem's Remote Data Facility," IEEE, Spring 1990.
Moline, H. et al., "Issues in Disater Recovery," IEEE, Spring 1990.
Ohran Michael R.
Ohran Richard S.
Etienne Ario
Harvey Jack B.
Vinca Corporation
LandOfFree
Method and system for providing a static snapshot of data stored does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for providing a static snapshot of data stored, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for providing a static snapshot of data stored will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1499521