Ch 3: Installing Optional Devices

Daisy Chain and Terminating Resistor

A maximum of seven SCSI devices can be serially connected to one SCSI controller. Such a serial connection is referred to as a daisy chain connection. The SCSI devices at both ends of the daisy chain require a resistor called a terminator (terminating resistor). If you attach a terminator onto another SCSI device, that SCSI device will not operate normally.

In Hitachi PC VisionBase 8450H/R Server, up to six SCSI devices can be connected to one controller.

NOTE: A terminating resistor is installed for the following devices supplied as standard in the Hitachi PC VisionBase 8450H/R Server: the SCSI controller, the disk array controller board, and the platter board on which internal hard disks are to be installed.

In Hitachi PC VisionBase 8450H/R Server you need not mount a terminating resistor onto removable devices; the SCSI cable to be connected already has one mounted.

SCSI device

SCSI IDs

A terminating resistor is mounted here

SCSI board

(a terminating resistor is mounted)

SCSI cable

Daisy chain image

SCSI IDs are numbers used to identify SCSI devices; 0 to 6 are used. Make sure that 0 is used for the SCSI ID for your starter hard disk. Be sure to set SCSI IDs so that there is no duplication within the group of SCSI devices (those within the same daisy chain) connected with the same SCSI controller.

If the same SCSI ID is used the more than one SCSI device in a group of SCSI devices connected to the same SCSI controller, the SCSI devices will malfunction.

NOTE: The SCSI ID for the SCSI controller is set to 7.

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Hitachi 8450H/R manual Daisy Chain and Terminating Resistor, Scsi IDs

8450H/R specifications

The Hitachi 8450H/R is a powerful and versatile machine designed for heavy construction and earth-moving tasks. Renowned for its robust design and high performance, it serves as a reliable partner in various industries, including mining, construction, and infrastructure development.

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In terms of engine performance, the Hitachi 8450H/R is powered by a reliable and fuel-efficient engine that offers impressive output while minimizing emissions. This not only helps operators save on fuel costs but also aligns with environmental regulations and sustainability goals. The engine is designed to provide optimal torque and power at various operating speeds, allowing for versatile applications.

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The machine's undercarriage is built for durability, equipped with heavy-duty tracks that ensure stability and traction on various ground conditions. This feature is particularly beneficial in challenging terrains where other machines might struggle. The suspension system further enhances ride comfort, allowing for smooth operation even on rough surfaces.

In addition to its robust build and high performance, the Hitachi 8450H/R is designed for easy maintenance. Key components are accessible, and the machine comes with advanced diagnostic systems that help operators identify potential issues before they escalate. This design philosophy not only reduces downtime but also extends the lifespan of the equipment.

Overall, the Hitachi 8450H/R combines advanced technologies, exceptional performance, and user-friendly features to deliver outstanding results in heavy-duty applications. Its blend of power, durability, and ease of operation makes it a top choice for construction and earth-moving professionals around the globe.