Fast write operations

Details Fast write operations Fast write operations

1987-08-31

1990-04-10

Clark, David L.

Boots, shoes, and leggings

364239, 364430, 364260, G06F 1300

Patent

active

049166050

ABSTRACT:
A technique is described for performing a fast write operation. A host write request, which would normally be serviced by an immediate physical write to a data storage device, is instead written to cache and nonvolatile storage in the data storage device controller. Then, the controller signals the host that the write operation is complete and does not update the physical data storage device until later. A journal log is also used to provide recovery capability in the event of system failure. This technique provides high performance for the units' operation while assuring integrity by keeping two copies of the write operation until the physical update transpires.

REFERENCES:
patent: 3588839 (1971-06-01), Belady et al.
patent: 4020466 (1977-04-01), Cordi et al.
patent: 4523206 (1985-06-01), Sasscer
patent: 4523275 (1985-06-01), Swenson et al.
patent: 4530055 (1985-07-01), Hamstra et al.
patent: 4598357 (1986-07-01), Swenson et al.
patent: 4608688 (1986-08-01), Hansen et al.
patent: 4779189 (1988-10-01), Legvold et al.
C. E. Hoff et al., "Selective Journaling", IBM Technical Disclosure Bulletin, vol. 18, No. 1, Jun. 1975, pp. 61-62.
N. K. Ouchi et al., "Check Point Copy for a Two-Stage Store," IBM Technical Disclosure Bulktin, vol. 20, No. 5, Oct. 1977, pp. 1955-1958.

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