Method for aborting data transfer commands

Details Method for aborting data transfer commands Method for aborting data transfer commands

2005-08-23

2005-08-23

Gaffin, Jeffrey (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

C710S024000

Reexamination Certificate

active

06934770

ABSTRACT:
A single hardware I/O control block is used to efficiently abort a target I/O command for a target I/O device, e.g., one target I/O device in a plurality of target I/O devices. The abort command is included in the same hardware I/O control block that specified the target I/O command to be aborted. Execution of both the target I/O command and the abort command returns only one hardware I/O control block pointer and generates only one interrupt to a host system when both the target I/O command and the abort command are completed. All time relationships between the execution of the abort command and execution of the original target I/O command are supported. There are no holes where the abort command is lost or where the host system is advised of target I/O command completion prematurely, or is not advised of completion at all.

REFERENCES:
patent: 5630094 (1997-05-01), Hayek et al.
patent: 5797034 (1998-08-01), Young
patent: 5923896 (1999-07-01), Young
patent: 6115796 (2000-09-01), Hayek et al.

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