Installing and Using Utilities 5-51

Check and Clear of MTBF Information

The MTBF information of a component can be viewed or cleared (initialized).

NEC Express5800/ft series manages the MTBF (mean time between failure) of each component. If a fault occurs in a component, the NEC Express5800/ft series calculates the MTBF of the component again. If the calculated value is lower than the pre-defined threshold, the NEC Express5800/ft series disables the component to be used.

Contact your maintenance personnel if such a symptom as above occurs.

IMPORTANT: A disabled component with the MTBF lower than the threshold can be forcibly enabled by clearing the MTBF. However, contact your maintenance personnel for the forced use of such a component.

To clear the MTBF information of a component with NEC ESMPRO Manager, use the [Maintenance] tree of the component of the [FTServer] tree of the data viewer. Open the tree of the component whose MTBF information is to be cleared and select the [Maintenance] tree.

To clear the MTBF information of a component with the ft server utility, use the utility screen of the component. The table below shows the potential cases in which the MTBF information of a component is to be cleared. Contact your maintenance personnel for clearing MTBF information.

Component

MTBF clear

 

Remote

Local

CPU Module

To start the module forcibly after

To start the module forcibly after replacing

 

replacing a module or if MTBF became

a module or if MTBF became lower than

 

lower than the threshold due to

the threshold due to malfunction and

 

malfunction and disabled the module.

disabled the module.

 

Executable in the following module

Executable in the following module state:

 

state (this can be viewed on manager

• Only the red LED is on and the event

 

screen):

 

indicating that MTBF is lower than the

 

 

 

• Broken

threshold is registered in the event log.

 

MTBF is lower than the threshold.

 

 

 

 

PCI Module

Same as above

Same as above

 

 

 

Ethernet

To start the module/component forcibly

To start the module/component forcibly

Adapter

after replacing a module or if MTBF

after replacing a module or if MTBF

 

became lower than the threshold due

became lower than the threshold due to

 

to malfunction and disabled the

malfunction and disabled the

 

module/component.

module/component.

 

Executable in the following module

Executable in the following module state

 

state (this can be viewed on manager

(this can be viewed on manager screen):

 

screen):

• Only the red LED is on and the event

 

• Broken

 

indicating that MTBF is lower than the

 

MTBF is lower than the threshold.

threshold is registered in the event log.

 

 

 

IMPORTANT: You can also clear MTBF information for the PCI module, Ethernet Adapter and SCSI Adapter by unplugging and plugging the live wire of the PCI module.