Intel SDS2 5.1.1 Fault Resilient Booting

Intel® Server Board SDS2 Server Management
Revision 1.2
Order Number: A85874-002 29
Pin Signal Name Description
C14 N_FAN6_SENSE_P Rear System Fan 2 Speed
L12 N_MEM_ALERT_L Memory ECC Error Detect
M12 N_BMC_SECUREMODE Secure Mode Detect
Note: For a complete listing of BMC sensors, please refer to SDS2 Baseboard Management
Controller External Product Specification.
Sahalee
ADM1026
Figure 7. SDS2 Locations of ADM1026 and Sahalee
5.1.1 Fault Resilient Booting
The Sahalee BMC implements Fault Resilient Booting (FRB) levels 1, 2, and 3. If the default
bootstrap processor (BSP) fails to complete the boot process, FRB attempts to boot using an
alternate processor.
• FRB level 1 is for recovery from a BIST failure detected during POST. This FRB recovery
is fully handled by BIOS code.
• FRB level 2 is for recovery from a Watchdog timeout during POST. The Watchdog timer
for FRB level 2 detection is implemented in the Sahalee BMC.
• FRB level 3 is for recovery from a Watchdog timeout on Hard Reset/Power-up. The
Sahalee BMC provides hardware functionality for this level of FRB.