Table 4. Front Panel Features

Item

Feature

Description

 

 

 

 

 

 

Front Panel Switches

 

 

 

 

 

 

 

C

NMI switch

A momentary contact switch used to instruct the processor to copy system

 

 

 

memory to the hard drive. Pressing the recessed button with a paper clip or pin

 

 

 

puts the server in a halt state for diagnostic purposes and allows you to issue a

 

 

 

non•maskable interrupt. After issuing the interrupt, a memory dump can be

 

 

 

performed to determine the cause of the problem.

 

 

 

 

 

 

D

Power switch

Toggles the system power on/off.

 

 

 

 

 

 

E

Reset switch

Reboots and initializes the system.

 

 

 

 

 

Front Panel Alarm LEDs and Relays

 

 

 

 

 

F

Critical (amber)

When

continuously lit, indicates the presence of a Critical System Fault. A

 

 

 

critical system fault is an error or event that is detected by the system with a

 

 

 

fatal impact to the system. In this case, the system cannot continue to operate.

 

 

 

An example could be the loss of a large section of memory or other corruption

 

 

 

that renders the system not operational. Additionally, the front panel critical

 

 

 

alarm relay will engage.

 

 

 

 

 

 

G

Major (amber)

When

continuously lit, indicates the presence of a Major System Fault.

A major

 

 

 

system fault is an error or event that is detected by the system that has

 

 

 

discernable impact to system operation. In this case, the system can continue

 

 

 

to operate but in a “degraded” fashion (reduced performance or loss of

 

 

 

non-fatal feature reduction). An example could be the loss of one of two

 

 

 

mirrored disks. Additionally, the front panel major alarm relay will engage.

 

 

 

 

 

H

Minor (amber)

When

continuously lit, indicates the presence of a Minor System Fault.

A minor

 

 

 

system fault is an error or event that is detected by the system but has little

 

 

 

impact to actual system operation. An example would be a correctable

 

 

 

ECC error. Additionally, the front panel minor alarm relay will engage.

 

 

 

 

 

I

Power (amber)

When

continuously lit, indicates the presence of a Power System Fault.

 

 

 

 

Additionally, the front panel power alarm relay will engage.

 

 

 

 

 

 

Front Panel Status LEDs

 

 

 

 

 

 

 

 

J

NIC activity LED

 

Indicates NIC activity.

 

 

(green)

 

 

 

 

 

 

 

 

K

HDD activity

 

Indicates any system SCSI hard drive activity.

 

 

LED (green)

 

 

 

 

 

 

 

L

Main power

 

When continuously lit, indicates the presence of DC power in the server. The

 

LED (green)

 

LED goes out when the power is turned off or the power source is disrupted.

 

 

 

When it is blinking green, it indicates that the system is in ACPI sleep mode.

 

 

 

 

 

Chassis Description

11

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IBM 343 manual Front Panel Features, Feature Description Front Panel Switches, Front Panel Alarm LEDs and Relays