公开(公告)号：WO1990000278A1

公开(公告)日：1990-01-11

申请号：PCT/US1989002720

申请日：1989-06-22

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  FRIES, William, J. ,  KLEINSCHNITZ, Donald ,  NELSON, T., Craig

IPC: G06F09/00

CPC classification number: G06F3/0601 ,  G06F3/1298 ,  G06F13/126 ,  G06F2003/0691 ,  G06K15/10

Abstract: In a data processing system which includes a host (12) computer connected by a channel (28) interface unit through an input/output (30) interface and control (26) unit to an input/output (16) device, commands and data associated with the commands are received in a buffer (32) and first checked to determine whether the command has any pertinent data. If such check reveals that there is no pertinent data associated with a given command, that command is changed to an immediate command. Otherwise, the command is given a pointer in the buffer (32) which prioritizes the order in which it will be carried out. Where a command is determined to have no pertinent data associated with such command, and a previously buffered command still in the buffer (32) has pertinent data associated therewith, consolidation of the command is carried out in order to improve efficiency of the input/output (16) device.