Ch 3: Installing Optional Devices

RAID5

Data, together with array parity, is striped in blocks, extending over all hard disks.

 

Advantages:

• Capacity-to-cost ratio is improved as compared with RAID1.

 

 

 

• Data redundancy is ensured by distributing data to several hard disks; therefore, each hard disk can

 

 

 

perform read/write operation independently. This type of disk array is useful for transaction processing

 

 

 

because data is striped in block.

 

 

 

• If a hard disk within the array fails, the lost data is computed based on the array parities, enabling the read/

 

 

 

write operation to continue. By replacing the hard disk, you can rebuild the data without interrupting your

 

 

 

current task.

 

 

 

• Because array parities are distributed to each hard disk, you can have the advantages of parallel

 

 

 

processing through independent access to the hard disks when writing data.

 

 

 

 

 

 

Disadvantages:

• Array parities are created during write operation, so performance for write operation is not as high as

 

 

 

RAID0.

 

 

 

• A read/write operation during data rebuilding will result in lower performance.

 

 

 

 

 

 

 

 

 

Number of hard disks required: 3 (min.) to 6 (max.)

54

Hitachi PC VisionBase 8450H/R Server

Page 57 Page 59
Page 58
Image 58
Hitachi 8450H/R manual RAID5
Page 57 Page 59

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.

One of the standout features of the Hitachi 8450H/R is its exceptional hydraulic system. This machine is equipped with a highly efficient hydraulic pump and advanced control systems that provide superior lifting and digging capabilities. The hydraulic system not only enhances operational efficiency but also ensures smooth and precise movements, which is critical when working in tight spaces or on uneven terrain.

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.

Another significant feature of the Hitachi 8450H/R is its operator-friendly cabin. Designed with ergonomics in mind, the cabin provides excellent visibility and comfort, reducing operator fatigue during long hours of operation. The intuitive control layout and advanced display systems provide critical information at a glance, enhancing operational safety and efficiency.

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.
Top Page Image Contents