Alert Standard Format (ASF) Specification

Alert Standard Format (ASF) Specification v2.0 DMTF Document DSP0136
DSP0136 23 April 2003 Page 17 of 94
Description Event Sensor Type Event Offset Event Data Fields
OS Boot
Failure
23h (Watchdog 2)
00h (Timer
Expired)
ED1 40h to indicate that the ED2 field
contains “interesting” data
ED2 03h to identify that no interrupt was
generated and that the timer was
monitoring an OS load process at
the time of expiration
OS Hung
20h (OS Critical
Stop)
01h (Run-time
stop)
N/A
3.1.5.5 System Heartbeat
ASF-enabled systems can provide the capability to send a periodic message indicating that the
system is still present. A timer present in the alert-sending device controls the frequency of this
message, which is referred to as a system heartbeat. The timer’s period is typically
programmable, but the period must not exceed 10 minutes. The recommended default is one
heartbeat per minute, and the alert-sending device’s OS-present configuration software provides
methods through which to disable the heartbeat transmission and set the enabled heartbeat’s
frequency timer. System Heartbeat messages are sent as single PET frames, and are not re-
transmitted.
If an alert-sending device supports this message, the following event-specific PET fields must be
used:
Event Sensor Type Event Type Event Offset Entity
25h (Entity presence) 6Fh (Sensor specific) 00h (Device Present) 23d (System Chassis)
3.1.5.6 System Boot Failure
A configured, ASF-enabled alert-sending device transmits a system boot failure alert if the system
firmware does not issue an SMBus Stop Watchdog Timer command within the client’s Minimum
Watchdog Reset Time (see 4.1.2.1). The alert-sending device starts its timer on the managed
client’s transition to the point where main PCI power is good. Following are the event-specific
PET fields associated with this alert:
PET Field Value
Event Sensor
Type
23h (Watchdog 2)
Event Type 6Fh (Sensor specific)
Event Offset 00h (Timer Expired)
Event Severity 10h (Critical)
Sensor Device FFh (Unspecified)
Sensor Number FFh (Unspecified)
Entity
00h (Unspecified). This value is used since the root cause of the failure associated
with the timer’s expiration is not known at the time of the alert.
Entity Instance 00h (Unspecified)
Event Data 4006h (ED2 valid, system boot failure).