RAID 5 with three hard drives

RAID 5 has been used in servers for many years and is one of the most common types of RAID. RAID 5 uses striping with parity data in distributed blocks across all member disks. Therefore, the mass storage controller can simultaneously write new information to two hard drives and parity information to the third hard drive, so if one hard drive fails, the RAID controller can rebuild all the information after the volume degradation occurred. Hence, RAID 5 with three hard drives has similar performance to RAID 0 with two hard drives, and the reliability of RAID 1 with a minimum of three hard drives.

Table 5: RAID 5 with three hard drives (parity)

First disk

Second disk

Third disk

 

 

 

Data Segment 1

Data Segment 2

Parity for 1 and 2

 

 

 

Data Segment 3

Parity for 3 and 4

Data Segment 4

 

 

 

Parity for 5 and 6

Data Segment 5

Data Segment 6

 

 

 

Data Segment 7

Data Segment 8

Parity for 7 and 8

 

 

 

Data Segment 9

Parity for 9 and 10

Data Segment 10

 

 

 

Parity for 11 and 12

Data Segment 11

Data Segment 12

 

 

 

Data Segment 13

Data Segment 14

Parity for 13 and 14

 

 

 

Data Segment 15

Parity for 15 and 16

Data Segment 16

 

 

 

Parity for 17 and 18

Data Segment 17

Data Segment 18

 

 

 

In the previous table, each “Data Segment x” represents a strip. A stripe is made with strip “Data Segment x”, “Data Segment y” and strip “Parity for x and y.” Notice that the strip “Parity for x and y” is used to store the required information to recreate the data if any one of the RAID volume members is compromised.

To better illustrate the concept of RAID 5 (parity-based RAID), Figure 4 shows how a sequence of data “ABCD...” is stored in a RAID 5. In this example, each letter represents a segment or strip. The various pieces of the information go to different hard drives, hence if any one member of the RAID 5 fails, the information from all members is not lost.

Figure 4: RAID 5 with three hard drives

11

Page 10 Page 12
Page 11
Image 11
HP 8200 tower manual RAID 5 with three hard drives, First disk Second disk Third disk
Page 10 Page 12

8200 tower specifications

The HP 8200 Tower is a robust desktop computer designed for professional environments, delivering performance and expandability for a variety of business needs. This workstation is part of HP's Elite series, known for its reliability and advanced technologies, making it a sound choice for companies requiring consistent operation.

One of the defining features of the HP 8200 Tower is its versatile processing power, powered by the Intel Core i5 and i7 processors. These processors offer a multi-core architecture, ensuring that users can efficiently handle multitasking and processor-intensive applications. With options for up to 32GB of DDR3 RAM, the HP 8200 Tower can smoothly run multiple applications simultaneously, making it suitable for tasks ranging from everyday office work to more demanding software like graphical design programs.

The system also provides a range of storage options, including traditional hard disk drives and faster solid-state drives, allowing users to select the balance of capacity and speed that best suits their needs. Additionally, the HP 8200 supports RAID configurations, enhancing data redundancy and performance, thereby protecting critical business data.

In terms of expandability, the HP 8200 Tower offers multiple PCIe slots for adding graphic cards, sound cards, or other expansion cards. This capability makes it adaptable for various purposes, whether that involves improving graphics performance for video editing or integrating specialized hardware for specific business functions.

The design of the HP 8200 Tower ensures efficient cooling and quiet operation. It features a tool-less chassis, allowing for easy upgrades and maintenance. The internal layout maximizes airflow, keeping components cool even under heavy workloads, an important feature for maintaining long-lasting performance.

Connectivity options are plentiful, with USB 2.0 and USB 3.0 ports, enabling speedy data transfer and peripheral connectivity. Additionally, integrated Gigabit Ethernet offers reliable networking capabilities, essential for seamless communication within a business environment.

The HP 8200 Tower showcases HP's commitment to sustainability, featuring energy-efficient components and a design aimed at reducing environmental impact. Overall, this powerful workstation combines performance, expandability, and energy efficiency, making it an excellent choice for any professional setting. With its blend of modern technologies and traditional reliability, the HP 8200 Tower stands out as a dependable tool for businesses looking to enhance productivity.
Top Page Image Contents