Advantech MIC-6314 Series, Руководство пользователя

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69 MIC-6314 User Manual
Chapter 3
B
MC Firmware
O
peration
3.10 Resets
Several reset types are support by the board. This section provides an overview of
the naming and differences between the available resets.
3.10.1 Baseboard Management Controller Resets
The MIC-6314 BMC supports two resets types: cold and warm resets, according to
the IPMI specification.
3.10.1.1 BMC Cold Reset
The cold BMC reset causes the default settings of all internal and external data/
states (e.g., message buffers, interrupt settings, sensor and event configurations,
and FRU LED states) and power up defaults to be restored.
Some events leading to BMC cold resets are outlined as follows:
 When the BMC is powered on, a cold BMC reset is performed.
 If the management power drops below a critical value, the BMC is cold reset.
When the management power returns to its normal value, the BMC is brought
out of reset.
 If the internal watchdog timer of the BMC expires, the BMC is cold reset.
 Users can force a BMC cold reset by pressing the front panel reset button and
holding for at least five seconds.
 Software is used to execute a standard IPMI “cold reset” command.
3.10.1.2 BMC Warm Reset
The warm BMC reset is similar to the cold reset, but with additional preserved data/
states (e.g., addresses and enable settings). With a warm reset, which can be exe-
cuted via a standard IPMI command, the BMC firmware recovers its state from local
memory.
3.10.2 Payload Reset
In addition to various management controller reset types, the board also supports
payload resets. The x86 system represents the payload of the MIC-6314 board.
3.10.2.1 Payload Cold Reset
A payload cold reset means that the hardware is reset to the module payload part,
similar to a power on reset. Some events that can cause payload cold resets are
listed as follows:
 Payload power activation after hot swap state change.
 The front panel reset button is pressed for a short period (less than five sec-
onds).
 The PICMG “FRU control (cold reset)” IPMI command is sent to the BMC.
 The IPMI chassis power command is sent to the BMC.
 IPMI BMC Watchdog events.
 “Control-Alt-Delete” is pressed on a connected keyboard.
 Standard operating system reset commands (e.g., Linux reboot).