Glossary

Disk Mirroring

Data written to one disk drive is simultaneously written

 

to another disk drive. If one disk fails, the other disk can

 

be used to run the system and reconstruct the failed disk.

Disk Spanning

Several disks appear as one large disk using this

 

technology. This virtual disk can then store data across

 

disks with ease without the user being concerned about

 

which disk contains what data. The subsystem handles

 

this for the user.

Disk Striping

Data is written across disks rather than on the same drive.

 

Segment 1 is written to drive 0, segment 2 is written to

 

drive 1, and so forth until a segment has been written to

 

the last drive in the chain. The next logical segment is

 

then written to drive 0, then to drive 1, and so forth until

 

the write operation is complete.

Duplexing

This refers to the use of two controllers to drive a disk

 

subsystem. Should one of the controllers fail, the other is

 

still available to provide disk I/O. In addition, depending

 

how the controller software is written, both controllers

 

may work together to read and write data simultaneously

 

to different drives.

Fault-Tolerant

When something is fault-tolerant it is resistent to failure.

 

A RAID 1 mirrored subsystem, for example, is

 

fault-tolerant because it can still provide disk I/O if one of

 

the disk drives in a mirrored system fails.

Hot Spare

The “Hot Spare” is one of the most important features the

 

controller provides to achieve automatic, non-stop service

 

with a high degree of fault tolerance. This rebuild

 

operation will be carried out by the controller

 

automatically when a SCSI disk drive fails.

Logical Drive

A set of contiguous chunks of a physical disk. Logical

 

disks are used in array implementations as constituents of

 

logical volumes or partitions. Logical disks are normally

 

transparent to the host environment, except when the

 

array containing them is being configured.

Mapping

The conversion between multiple data addressing

 

schemes, especially conversions between member disk

 

block addresses of the virtual disks presented to the

 

operating environment by the array management

 

software.

Mirroring

Refers to the 100% duplication of data on one disk drive

 

to another disk drive. Each disk will be the mirror image

 

of the other.

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NStor Technologies CR8e, Disk Array Enclosure manual Glossary

CR8e, Disk Array Enclosure specifications

NStor Technologies has long been recognized for its innovative storage solutions, and the CR8e Disk Array Enclosure is a prime example of this legacy. Designed to meet the growing demands of data storage in enterprise environments, the CR8e offers a robust and efficient platform for managing and securing critical data.

One of the standout features of the CR8e is its impressive capacity. Supporting up to eight 3.5-inch or 2.5-inch drive bays, it allows for flexibility in choosing the right drives, including SATA, SAS, and SSD options. This adaptability not only meets varying performance requirements but also ensures that organizations can tailor their storage solutions based on specific operational needs.

The CR8e is designed with redundancy in mind, featuring hot-swappable drive bays that enable users to replace drives without downtime, thus ensuring continuous operation. Additionally, its dual-redundant power supplies and cooling fans provide enhanced reliability. This feature is crucial for businesses that cannot afford interruptions, ensuring that their data remains secure and accessible at all times.

In terms of connectivity, the NStor CR8e supports multiple interface options, including both SAS and SATA, catering to different storage protocols and enhancing compatibility with existing systems. It is equipped with advanced RAID functionalities, supporting various RAID levels such as 0, 1, 5, and 6. This capability allows users to choose the most suitable data protection and performance strategy for their environment.

Management is made simple thanks to its user-friendly interface, which offers ease of configuration and monitoring. The enclosure also provides comprehensive diagnostic and reporting features, assisting administrators in maintaining optimal storage conditions and prolonging the lifespan of the equipment.

Furthermore, the CR8e is designed with scalability in mind. As data storage needs grow, organizations can easily expand their storage capacity by adding more enclosures. This feature allows businesses to future-proof their investments in storage technology.

NStor Technologies has incorporated cutting-edge technologies in the CR8e to ensure high-speed data transfer rates, reducing latency and enhancing overall system performance. The enclosure’s design emphasizes thermal efficiency, ensuring that the internal components are kept at optimal temperatures even during high-performance operations.

In summary, the NStor Technologies CR8e Disk Array Enclosure is a versatile and powerful solution for organizations seeking to enhance their data storage capabilities. With its robust features, excellent scalability, and emphasis on reliability, it stands out as an ideal choice for enterprises focused on safeguarding their data assets.