Writing a sequence of M bytes to a disk with continuous...

Details Writing a sequence of M bytes to a disk with continuous... Writing a sequence of M bytes to a disk with continuous...

2006-12-05

2006-12-05

Robertson, David L. (Department: 2192)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

Reexamination Certificate

active

07146459

ABSTRACT:
A method of writing data to a disk, said method performing a write-modify-read for every partial 8 byte write, said method comprising: receiving a request for a sequence of L bytes; determining whether the last byte of the sequence of L bytes is last byte of an 8 byte boundary in a sector of the disk; modifying, if the last byte of the sequence of L bytes is not the last byte of an 8 byte boundary in a sector of the disk, the number of bytes L by an amount of bytes that would allow the last byte of reduced request to be the last byte of an 8 byte boundary in a sector of the disk, said modified number of bytes represented by M; requesting a sequence of M bytes receiving the sequence of M bytes; writing the sequence of M bytes to one or more disk sectors with continuous write steps whereby the sequence of M bytes does not need a partial 8 byte write and there is no read-modify-write step.

REFERENCES:
patent: 5652857 (1997-07-01), Shimoi et al.
patent: 5724542 (1998-03-01), Taroda et al.
patent: 5802557 (1998-09-01), Vishlitzky et al.
patent: 6546447 (2003-04-01), Buckland et al.

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