Method for enabling overlapped input/output requests to a...

Details Method for enabling overlapped input/output requests to a... Method for enabling overlapped input/output requests to a...

2005-01-04

2005-01-04

Huynh, Kim (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

C710S006000, C710S033000, C710S036000, C710S038000

Reexamination Certificate

active

06839773

ABSTRACT:
A method for enabling overlapped input/output requests to a logical device using assigned and parallel access unit control blocks. Each I/O request interrupts an operating system to assign a base and related unit control block to the input/output requests. In addition a parallel access control block is associated with each unit control block for a logical volume and a parallel access main control block is established with a logical volume through which each of the base and related unit control block can be identified. An input/output request to a logical device interrupts the operating system to assign one of the base and one of the assigned unit control blocks to the input/output requests after which control transfers back to the operating system. At a disk storage facility, the input/output request is located in a table with other input/output requests and corresponding parameters. The disk array storage facility tests the parameters for each new input/output request to determine which of a plurality of control functions will be performed.

REFERENCES:
patent: 5530897 (1996-06-01), Meritt
patent: 6167459 (2000-12-01), Beardsley et al.
patent: 6170023 (2001-01-01), Beardsely et al.
patent: 6185638 (2001-02-01), Beardsely et al.
patent: 6665739 (2003-12-01), Vishlitzky et al.

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