FastTrak S150 TX4 User Manual

About Dual Data Redundancy

One unique (though rarely occurring) feature of RAID 0+1 is dual fault tolerance. In some cases, two drives can fail simultaneously yet the array still maintains the integrity of data. There are six combinations in which two of the four drives can fail. FastTrak S150 TX4 protects the data array in four of those cases.

Assume the drives are configured as follows:

CH indicates channels on the FastTrak S150 TX4 card.

A/B indicates which striped pair the drive belongs to.

1/2 indicates which part of stripe data.

CH 1

CH 2

CH 3

CH 4

 

 

 

 

Drive A1

Drive A2

Drive B1

Drive B2

 

 

 

 

Under RAID 0+1, the array maintains data integrity if any 1, 2 combination survives.

 

Failed

Array

 

Event

Drives

Status

Why?

1

A1/A2

Functional

B1/B2 retain array integrity

 

 

 

 

2

B1/B2

Functional

A1/A2 retain array integrity

 

 

 

 

3

A1/B2

Functional

B1/A2 retain array integrity

 

 

 

 

4

B1/A2

Functional

A1/B2 retain array integrity

 

 

 

 

5

A1/B1

Offline

B2/A2 contain only half of array data

 

 

 

 

6

B2/A2

Offline

A1/B1 contain only half of array data

 

 

 

 

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Promise Technology S150 user manual About Dual Data Redundancy, Failed Array Event Drives Status Why?

S150 specifications

Promise Technology S150 is an advanced storage solution designed to meet the data management needs of modern businesses. This high-performance storage appliance is characterized by its scalability, reliability, and user-friendly management interface, making it an optimal choice for organizations looking to optimize their data storage strategies.

One of the standout features of the S150 is its support for multiple RAID levels, including RAID 0, 1, 5, 6, and 10. This ensures that businesses can tailor their storage configurations based on their specific redundancy and performance requirements. The S150's software-defined storage capabilities provide flexibility in allocating resources, enabling organizations to manage their data efficiently and improve overall performance.

In terms of connectivity, the Promise S150 offers a range of options, including high-speed 10GbE and Fibre Channel interfaces. These technologies ensure that data transfer rates remain high, minimizing latency and allowing seamless access to applications and data. Additionally, the device supports hot-swappable drives, allowing users to replace or upgrade components without downtime, further enhancing productivity.

The management of the S150 is simplified through the Promise Management software, which provides intuitive controls and monitoring capabilities. Users can easily configure storage settings, monitor performance metrics, and maintain data integrity using the built-in tools. The software's graphical user interface makes it straightforward even for those without extensive IT experience, reducing the administrative burden on staff.

Another notable characteristic of the S150 is its robust security features. It provides options for data encryption both at rest and in transit, ensuring that sensitive information is protected against unauthorized access. Advanced user authentication protocols further enhance security, making it suitable for enterprises dealing with confidential data.

The S150 is also designed with energy efficiency in mind. Its intelligent cooling system and power management features help to reduce overall energy consumption, which is crucial for organizations looking to lower operational costs and reduce their environmental impact.

In summary, Promise Technology S150 stands out in the storage market due to its combination of scalability, versatility, and robust management features. With its support for multiple RAID configurations, high-speed connectivity options, intuitive management software, and strong security protocols, the S150 is well-equipped to support the data demands of businesses today and into the future. It represents a reliable and efficient solution for those looking to enhance their data storage infrastructure.