Intel S2600IP Service Guide - Page 144

OS Boot Watchdog Timer

Page 144 highlights

BIOS Setup Utilities Option Values: Enabled Disabled Help Text: If enabled, clears the System Event Log. All current entries will be lost. Note: This option is reset to [Disabled] after a reboot. Comments: This option sends a message to the BMC to request it to clear the System Event Log. The log will be cleared, and then the "Clear" action itself will be logged as an event. This give the user a time/date for when the log was cleared. 9. FRB-2 Enable Option Values: Enabled Disabled Help Text: Fault Resilient Boot (FRB). BIOS programs the BMC watchdog timer for approximately 6 minutes. If BIOS does not complete POST before the timer expires, the BMC will reset the system. Comments: This option controls whether the system will be reset if the BMC Watchdog Timer detects what appears to be a hang during POST. When the BMC Watchdog Timer is purposed as an FRB-2 timer, it is initially set to allow 6 minutes for POST to complete. However, the FRB-2 Timer is suspended during times when some lengthy operations are in progress, like executing Option ROMS, during Setup, and when BIOS is waiting for a password. or for input to the F6 BBS Boot Menu. The FRB-2 Timer is also suspended while POST is paused with the key. 10. OS Boot Watchdog Timer Option Values: Enabled Disabled Help Text: BIOS programs the watchdog timer with the timeout value selected. If the OS does not complete booting before the timer expires, the BMC will reset the system and an error will be logged. Requires OS support or Intel Management Software Support. Comments: This option controls whether the system will set the BMC Watchdog to detect an appearent to be a hang during OS booting. BIOS sets the timer before starting the OS bootstrap load procedure. If the OS Load Watchdog Timer times out, then presumably the OS failed to boot properly. If the OS does boot up successfully, it must be aware of the OS Load Watchdog Timer and immediately turn it off before it expires. The OS may turn off the timer, or more often the timer may be repurposed as an OS Watchdog Timer to protect against runtime OS hangs. 132 Intel® Server System R2000IP Service Guide

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BIOS Setup Utilities
132
Intel
®
Server System R2000IP Service Guide
Option Values: Enabled
Disabled
Help Text:
If enabled, clears the System Event Log. All current entries will be lost.
Note
: This option is reset to [Disabled] after a reboot.
Comments: This option sends a message to the BMC to request it to clear the System Event Log.
The log will be cleared, and then the “Clear” action itself will be logged as an
event. This give the
user a time/date for when the log was cleared.
9.
FRB-2 Enable
Option Values:
Enabled
Disabled
Help Text:
Fault Resilient Boot (FRB).
BIOS programs the BMC watchdog timer for approximately 6 minutes. If BIOS does not
complete POST before the timer expires, the BMC will reset the system.
Comments: This option controls whether the system will be reset if the BMC Watchdog Timer
detects what appears to be a hang during POST. When the BMC Watchdog Timer is purposed as
an FRB-2 timer, it is initially set to allow 6 minutes for POST to complete.
However, the FRB-2 Timer is suspended during times when some lengthy operations are in
progress, like executing Option ROMS, during Setup, and when BIOS is waiting for a password.
or for input to the F6 BBS Boot Menu. The FRB-2 Timer is also suspended while POST is
paused with the <Pause> key.
10.
OS Boot Watchdog Timer
Option Values: Enabled
Disabled
Help Text:
BIOS programs the watchdog timer with the timeout value selected. If the OS does not
complete booting before the timer expires, the BMC will reset the system and an error
will be logged.
Requires OS support or Intel Management Software Support.
Comments: This option controls whether the system will set the BMC Watchdog to detect an
appearent to be a hang during OS booting. BIOS sets the timer before starting the OS bootstrap
load procedure. If the OS Load Watchdog Timer times out, then presumably the OS failed to boot
properly.
If the OS does boot up successfully, it must be aware of the OS Load Watchdog Timer and
immediately turn it off before it expires. The OS may turn off the timer, or more often the timer
may be repurposed as an OS Watchdog Timer to protect against runtime OS hangs.