| 摘要 |
PURPOSE:To investigate the cause of a fault without imposing burden on a file controller by collecting internal information relating to a start I/O setting a fault operation command from a host as the opportunity when MIH(MISSING INTERRUPT HANDRER) is generated. CONSTITUTION:The file controller 1 makes access designated filing devices 2a-2n corresponding to an SIO(start I/O) command from the host, and applies interruption to the host 3 when access is completed, and performs data transfer between the host 3 and the filing devices 2a-2n by performing re-coupling. The host 3 detects time-out when no response from the file controller 1 for the SIO command is received within prescribed time, and issues the fault operation command(e). The file controller 1 cancels the SIO command replying to the fault operation command, and also, collects the internal information by the execution of the SIO command, then, preserves it in internal memory(f). |
