Devices Monitored
Default Time Interval Values
- or-• The condition is pending
This message warns the system operator or system programmer that a problem may
exist. The system operator or the system programmer can reset the hardware and
schedule maintenance for the device that caused the missing interrupt condition. If
the same device class caused frequent interruptions, the system programmer may
want to set a larger time interval for that particular device class.
The class GSET command can be used to turn MIH on and off. Use either SET MIH ON or SET MIH OFF To determine the status of MIH use
QUERYSET The system responds either
MIHON or MIH OFF Each device group has an expected time interval during which an I/O operation
should be completed. This interval varies widely among devices. Therefore, the
missing interrupt handler provides a means to specify a time interval for the follow
ing distinct categories ofI/O devices: • Count-key-data devices (CLASDASD) and FB-512 devices (CLASFBA)
Tape devices(CLASTAPE) • Graphic devices (CLASGRAF) except TYPI053 and TYP328X • Unit record devices (CLASURI and CLASURO) except TYP3800 and TYP3289E • Miscellaneous devices (MISC) include: Mass storage system (MSS) devices
(specified at system generation asCLASSPEC TYP3851, and CLASDASD FEATURE = VIRTUAL or FEATURE=SYSVIRT), graphics devices TYPI053 and TYP328X, and UR output devices TYP3800 and TYP3289E. Note: The missing interrupt handler does not support terminal devices, remote
graphic devices,SNA devices, pass-through virtual machine (logical) devices, and
special class devices (with the exception ofMSS). Default time interval values are assembled in DMKSYS. The following table gives
the default time interval values for the devices monitored:
Interruption Handling 19
Default Time Interval Values
- or-
This message warns the system operator or system programmer that a problem may
exist. The system operator or the system programmer can reset the hardware and
schedule maintenance for the device that caused the missing interrupt condition. If
the same device class caused frequent interruptions, the system programmer may
want to set a larger time interval for that particular device class.
The class G
QUERY
MIH
should be completed. This interval varies widely among devices. Therefore, the
missing interrupt handler provides a means to specify a time interval for the follow
ing distinct categories of
Tape devices
(specified at system generation as
graphic devices,
special class devices (with the exception of
the default time interval values for the devices monitored:
Interruption Handling 19