Troubleshooting 7-25

†Is the power-on order correct?

οWhen the server has any external devices connected, power on the external devices first, then the server.

†Did you install drivers for connected optional devices?

οSome optional devices require specific device drivers. Refer to the manual that comes with the device to install its driver.

†Is SCSI controller (including options) configuration correct?

οIf the sever has an optional SCSI controller board and SCSI devices are hooked up to the server, make correct settings by the SCSI controller board’s SCSI BIOS utility. For details, see manuals included with the SCSI controller board.

†Is SCSI device configuration correct?

οIf external SCSI devices are connected to the server, you need to make settings of SCSI ID and terminal resistance. For details, see manuals included with the SCSI device.

†Does the SCSI driver recognize the target devices?

οExecute the following command to check if the SCSI driver recognizes the target devices.

>cat /proc/scsi/scsi

†Is a driver which supports the SCSI device loaded to kernel?

οExecute the following command to check if a driver which supports the SCSI device is loaded to kernel.

>lsmod

CPUs not in Duplex mode:

οCheck if the memory configuration is correct.

οCheck if third-party CPUs or memory (DIMM) are used.

BIOSes not in Duplex mode due to differences between both modules:

οCheck if the setting of [Automatic firmware update] is disabled on the [System Setting] screen on the main window of [Server Maintenance Utility].

οIf the setting of [Automatic firmware update] is enabled and modules are remounted, BIOSes are automatically updated and duplicated. At this time, it is recommended to reduce the load of the system as much as possible.

Disks not in Duplex mode:

οUnless you perform mirroring (including reconfiguration after failed disks are replaced) in correct order, the mirror may not be (re)configured. Check if the steps were correct.

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NEC EXP320B, EXP320A, N8800-091F, N8800-090F manual CPUs not in Duplex mode, Disks not in Duplex mode

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.

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