What is a RAID Controller?
A RAID controller is a hardware appliance or software schedule that manages hard disc drives or solid-state movements in a computer or storage array so that they can function as a logical unit. A RAID controller security stored data while also potentially enhancing computing commission by revving access to stored data.
- A RAID controller acts as a bridge between an operating system and the physical drives.
A RAID controller offers applications and operating systems businesses or areas of drives as analytical units for which data security systems can be defined. Even though they may consist of parts of multiple drives, the logical units appear to applications and operating systems as endeavors. Because the controller can access numerous copies of data across numerous physical devices, it can improve performance and protect data in the event of a system crash.
There are approximately ten different RAID configurations unrestricted, as well as numerous proprietary variations of the standard set of RAID levels. A RAID controller will support a single RAID level or a group of levels that are related.
- Hardware vs. software RAID controllers
A physical controller is used to manage the array in hardware-based RAID. The controller can be a PCI or PCI Express card that is created to support a specific drive format such as SATA or SCSI. Hardware RAID controllers are also known as RAID adapters.
Hardware controller prices vary significantly, with desktop-capable cards available for less than $50. More cosmopolitan hardware controllers capable of keeping shared networked storage are quite more expensive, typically ranging from a few hundred dollars to more than a thousand dollars.
LSI, Microsemi Adaptec, Intel, IBM, Dell, and Cisco are simply a few of the companies that currently provide hardware RAID controllers.
When choosing a hardware RAID controller, you should consider the following key features:
- Interfaces for SATA and/or SAS (and related throughout speeds)
Supported RAID levels
Compatibility with operating systems
Supported device count
Performance in reading
PCIe interface cache size
Capabilities for encryption
Consumption of energy
A controller can also be software-only, using the host system's hardware resources, especially the CPU and DRAM. Although software-based RAID delivers the same functionality as hardware-based RAID, its implementation is typically inferior to that of the hardware versions.
Because no special hardware is needed, the main benefits of using a software controller are flexibility and low cost. However, it is crucial to ensure that the host system's processor is powerful enough to run the software without negatively impacting the performance of other applications running on the host.
RAID controller software is contained in some operating systems. For example, RAID capabilities are provided by Windows Server's Storage Spaces facility. Most enterprise-class Linux servers include RAID controller software in the form of the Linux mdadm utility.
Third-party software RAID controllers, such as SnapRAID, Stablebit DrivePool, SoftRAID, and FlexRAID, are also available. These programs are typically adequate for small installations but may not meet the storage performance and capacity requirements of business environments.
Some commercially available storage arrays use software RAID controllers, but the software is typically developed and enhanced by the storage vendor to provide adequate performance. Furthermore, storage systems with software controllers are typically built around powerful processors dedicated to controlling and managing the shared storage system.
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Author - Johnson Augustine
Cloud Architect, Ethical hacker
Founder: Airo Global Software Inc
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