Patent ID: 6173339
Filing Date: 2001-01-09
Classification: G06F

Abstract:
A method of monitoring execution of input/output commands for input/output devices based on a time-out period of each of a plurality of host computers sharing the input/output devices, comprising the steps of:retaining control parameters of an operation control command sent by one of the host computers, the control parameters including an operation completion time;sequentially receiving command entries sent for the devices by the host computers and retaining the command entries in a table, each entry including a relative elapsed time measured from a time the entry is retained in the table; andsetting a time-out period of said one of the host computers, the time-out period being the operation completion time, so that execution of each of the entries in the table is monitored based on a comparison between each of the relative elapsed times of the entries and the operation completion time,wherein the control parameters retained in the retaining step include an operation designation, and the operation designation is indicative of a command type of the command entries in the table to which the operation completion time applies.