Default BIOS Power-On Self-Test (POST) Events

At system startup, the BIOS performs a power-on self-test that checks the hardware on your server to ensure that all components are present and functioning properly, identifies the events that can occur during BIOS POST, and specifies whether these event can prevent the host from powering on.

Event	Cause	Boot continues on host?
User password violation	Attempt to enter password fails three times	No
Setup password violation	Attempt to enter password fails three times	No
Correctable ECC	Correctable ECC (error correction code) error detected	Yes
Uncorrectable ECC	Uncorrectable ECC error detected	Yes
No system memory	No physical memory detected in the system	No
No usable system memory	All installed memory has experienced an unrecoverable failure	No
Boot media failure	No removable boot media is found	Yes
CMOS is set to optimal default	Load optimal default	Yes
CMOS time and data error	RTC is invalid	Yes
IOH errors reported	IOH errors	Yes
CMOS battery low	CMOS battery is low	Yes
System restart	System boot initiated	Yes
Initiated by hard reset	Boot process started by hard reset	Yes
Memory initialization	Memory sizing is occurring System firmware progress	Does not apply
Motherboard initialization	Primary CPU initialization	Does not apply
Secondary processor initialization	Secondary CPU initialization System firmware progress	Does not apply
Initiated by warm reset	Boot process started by warm reset	Does not apply
Embedded controller management	Management controller initialization	Does not apply
PCI resource initialization	BIOS initializes PCI resources	Does not apply
Video initialization	BIOS initializes video	Does not apply
USB resource configuration	BIOS configures USB resources	Does not apply
Option ROM initialization	BIOS initializes Option ROMs System firmware progress	Does not apply
Not enough option ROM space allocated for device	BIOS cannot copy an option ROM to memory. This is likely due to a large number of PCIe Express modules (PCIe EMs) attached to the system.	Booting over a PCIe EM might not be possible.
User initiated system set up	End user initiated access to BIOS Setup utility System firmware progress	Does not apply
User initiated boot to OS	System boot initiated System firmware progress	Does not apply
No bootable media	Nothing to boot from	No
PXE server not found	Boot error - PXE server not found	No
ACPI power state	Soft-off power on (S0) or off (S5)	Does not apply
Not enough IO address space allocated for device	Cannot allocate resources to an onboard device (PEM, REM, FEM), and slot is disabled	Yes

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	Sun Fire X4800 Server Product Documentation