Method and means for managing disk drive level logic and buffer

Details Method and means for managing disk drive level logic and buffer Method and means for managing disk drive level logic and buffer

1997-11-13

2000-08-29

Bragdon, Reginald G.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

710 52, 711114, 711155, G06F 1320, G06F 1316

Patent

active

061122556

ABSTRACT:
A method and means for performing logical-combining functions such as XOR operations in a RAID 3 or 5 array or a combinational configuration of disk drives. The logical combining occurs below the device attachment interface and is used in generating new parity for write update operations and data rebuilding. Each disk drive is modified to use a segmented and address synchronized buffer in the write and read paths, and a logical circuit that combines the data in the write path before buffering with the data in the read buffer as it is read out from the buffer. The logically combined result is presented at the device read path interface. The combined data from a first disk drive interface is introduced into the write path of a second path through the second device interface and the logical combining repeated ad seriatim, the device interfaces being connectable in a daisy-chain manner and configurable by array controller commands.

REFERENCES:
patent: 3976982 (1976-08-01), Eiselen
patent: 4092732 (1978-05-01), Ouchi
patent: 4207609 (1980-06-01), Luiz et al.
patent: 4761785 (1988-08-01), Clark et al.
patent: 5278838 (1994-01-01), Ng et al.
patent: 5301297 (1994-04-01), Menon et al.
patent: 5574736 (1996-11-01), Bandy
patent: 5594862 (1997-01-01), Winkler et al.
patent: 5737510 (1998-04-01), Kakuta et al.
patent: 5745671 (1998-04-01), Hodges
Patterson, "A Case for Redundant Arrays of Inexpensive Disks (RAID)", Proceedings of the 1988 ACM SIGMOD Conference on Management of Data, Chicago, Illinois, Jun. 1988, pp. 109-116.
Patterson et al., "Computer Organization and Design--The Hardware/Software Interface", copyright 1994 by Morgan and Kaufman Publishers, pp. 548-566.
Langdon, "Computer Design", copyright 1982 by Computeach Press, Inc., pp. 463-505.

Affiliated with

Also associated with

Rating

Method and means for managing disk drive level logic and buffer 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 means for managing disk drive level logic and buffer , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and means for managing disk drive level logic and buffer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1259489