System Event Log Troubleshooting Guide for Intel® S5500/S3420

System Event Log Troubleshooting Guide for Intel

®

Miscellaneous Events

11. Miscellaneous Events

The miscellaneous events section addresses sensors not easily grouped with other sensor types.

11.1 IPMI Watchdog

PCSD server systems support an IPMI watchdog timer, which can check to see whether the OS is still responsive. The timer is disabled by default, and has to be enabled manually. It then requires an IPMI-aware utility in the operating system that will reset the timer before it expires.

If the timer does expire, the BMC can take action if it is configured to do so (reset, power down, power cycle, or generate a critical interrupt).

Table 76: IPMI Watchdog Sensor Typical Characteristics

Byte Field

11 Sensor Type

12 Sensor Number

13 Event Direction and

Event Type

14 Event Data 1

Description

23h = Watchdog 2

03h

[7] Event direction

0b = Assertion Event

1b = Deassertion Event

[6:0] Event Type = 6Fh (Sensor Specific)

[7:6] – 11B = Sensor-specific event extension code in Event Data 2

[5:4] – 00b = Unspecified Event Data 3

[3:0] – Event Trigger Offset as describe in Table 77

Revision 1.1 Intel order number G74211-002 75

Miscellaneous Events

Byte Field

15 Event Data 2

Description

[7:4] – Interrupt type

0h = None

1h = SMI

2h = NMI

3h = Messaging Interrupt

Fh = Unspecified

All other = Reserved

[3:0] – Timer use at expiration

0h = Reserved

1h = BIOS FRB2

2h = BIOS/POST

3h = OS Load

4h = SMS/OS

5h = OEM

Fh = Unspecified

All other = Reserved

Not used 16 Event Data 3

Table 77: IPMI Watchdog Sensor Event Trigger Offset – Next Steps

Event Trigger Offset

Hex Description

00h Timer expired, status only

01h Hard reset

02h Power down

03h Power cycle

08h Timer interrupt

Description

Our server systems support a BMC watchdog timer, which can check to see whether the OS is still responsive. The timer is disabled by default, and has to be enabled manually. It then requires an IPMI-aware utility in the operating system that will reset the timer before it expires. If the timer does expire, the

BMC can take action if it is configured to do so (reset, power down, power cycle, or generate a critical interrupt).

Next Steps

If this event is being logged, it is because the BMC has been configured to check the watchdog timer.

1. Make sure you have support for this in your OS (typically using a third-party

IPMI-aware utility like ipmitool or ipmiutil along with the openipmi driver).

2. If this is the case, then it is likely your OS has hung, and you should investigate

OS event logs to determine what may have caused this.

76 Intel order number G74211-002 Revision 1.1