7-28 Troubleshooting

Note: You can change the interactive startup mode by entering the message “I” when “Press ‘I’ to enter interactive startup.” appears during the OS startup.

-When the system enters into the maintenance mode while the OS is starting.

Note: The following message is displayed on the screen: Give root password for maintenance

(or type Control-D to continue):

-For other cases that daemons and/or drivers are not started successfully due to errors or other causes.

Note: For configuration that the actual memory capacity and the disk capacity are large, it is recommended to change the BIOS Setup from the default (10 minutes) to an appropriate value.

It takes time to display the screen on the OS when 2.5GB or more memory is mounted:

οCheck the Cache Settings of the BIOS settings. In the Processor Settings on the Main screen, change the Cache Settings to “Discrete.” This setting optimizes the visual display.

OS behavior is unstable:

†Have you modified kernel?

οConfirm that no patch for general kernel is applied or that the kernel that has been installed for NEC Express5800/ft series is not modified.

IO module is not disconnected:

οWhen you attempt to disconnect IO module while network adapter and/or SCSI adapter and/or FC adapter is not in dual mode, the following message will be recorded to the system event log and the IO module will not be separated. In this case, check each adapter setting referring to “After starting up, FT Status LED do not illuminate or illuminate amber” of this chapter.

Source: HasCtrl

Type: Warning

Event ID: 1505

Description: Device [Device name] is not duplexing. [Device name] “LAN” or “SCSI” or “FC”

οWhen you attempt to disconnect IO module when the HAS Fault Tolerance service is not started, the following message will be recorded to the system event log and the IO module will not be separated. In this case, refer to “After starting up, FT Status LED do not illuminate or illuminate amber” of this chapter to start the HAS Fault Tolerance service and retry disconnecting the I/O module.

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NEC EXP320A, EXP320B, N8800-091F, N8800-090F manual OS behavior is unstable, IO module is not disconnected
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N8800-091F, EXP320B, EXP320A, N8800-090F specifications

The NEC N8800-090F, EXP320A, EXP320B, and N8800-091F are advanced computing solutions designed for demanding enterprise environments. These models are part of NEC's high-performance computing portfolio, tailored for data-intensive applications and virtualization.

The N8800-090F is a robust server featuring powerful multi-core processors, providing exceptional performance for complex calculations and heavy workloads. This server supports a variety of memory configurations, enabling scalability and flexibility to meet the evolving needs of businesses. Its architecture is designed to facilitate high availability, ensuring that critical applications remain operational even in the event of hardware failures.

The EXP320A and EXP320B are expansion units that complement the N8800 series by providing additional storage and I/O capacity. They are ideal for organizations that require massive data storage solutions. These expansion units support different types of storage media, including high-speed SSDs and high-capacity HDDs. This allows for a customizable approach to data management, catering to various performance and capacity requirements.

One of the standout features across these models is their support for advanced virtualization technologies. The systems are equipped with features that enable efficient resource management, allowing multiple virtual instances to run on a single physical server without significant performance degradation. This is crucial for businesses looking to optimize their IT resources and improve operational efficiency.

Furthermore, NEC has integrated advanced security features into these servers to protect sensitive data and ensure compliance with industry regulations. This includes hardware-based security mechanisms, secure boot processes, and comprehensive management tools that provide organizations with enhanced control over their server environments.

Overall, the NEC N8800-090F, EXP320A, EXP320B, and N8800-091F present a compelling choice for enterprises looking for reliable, scalable, and high-performance computing solutions. With their cutting-edge technologies and robust design, these models aim to support the growth and adaptability of modern IT infrastructures while delivering exceptional performance for a wide range of applications.
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