RAID Controllers

Buy RAID Controllers for Servers and Storage Systems

A RAID controller is a storage controller used to manage multiple hard drives or solid-state drives as a RAID array. Depending on the controller, it can support storage configurations designed for performance, redundancy, capacity, or a combination of these requirements.

At iTech Devices, customers can compare server RAID controllers using important specifications such as brand, interface, number of ports, supported drives, RAID levels, PCI Express generation, data transfer speed, cache memory, and server compatibility.

When buying a RAID controller, always confirm that the controller is compatible with your server, drives, backplane, operating environment, and required RAID configuration.

Shop RAID Controller Cards by Brand

Shop RAID controller cards by brand at iTech Devices to find compatible storage controllers for servers, workstations, and enterprise storage systems. Compare leading brands based on server compatibility, RAID levels, SAS or SATA support, PCIe interface, port count, cache, and performance requirements.

Dell RAID Controllers

Shop Dell RAID controllers and PERC cards for compatible Dell PowerEdge servers, with options supporting multiple RAID levels, SAS/SATA drives, and enterprise storage configurations.

HPE RAID Controllers

Choose HPE RAID controllers and Smart Array controllers for compatible HPE servers requiring reliable SAS/SATA storage management, RAID support, cache, and scalable drive connectivity.

LSI RAID Controllers

Explore LSI RAID controllers for server and storage applications, including popular SAS RAID cards with different port counts, RAID capabilities, and PCIe interfaces.

Broadcom MegaRAID Controllers

Shop Broadcom MegaRAID controllers designed for high-performance server storage, with options supporting SAS/SATA drives, advanced RAID levels, cache, and enterprise workloads.

Adaptec RAID Controllers

Find Adaptec RAID controllers for compatible server and workstation storage systems requiring SATA or SAS connectivity, hardware RAID support, and flexible drive management.

Cisco RAID Controllers

Browse Cisco RAID controllers for compatible Cisco server environments, with storage controller options designed to manage SAS or SATA drives and supported RAID configurations.

Intel RAID Controllers

Shop Intel RAID controllers for compatible Intel server platforms, offering storage management options for SAS/SATA drives, multiple RAID levels, and PCIe-based server systems.

Supermicro RAID Controllers

Explore Supermicro RAID controllers for compatible Supermicro servers and storage systems, with options for SAS/SATA connectivity, RAID arrays, and enterprise storage expansion.

SAS RAID Controllers

A SAS RAID controller manages compatible Serial Attached SCSI storage devices and may also support SATA drives, depending on the controller and server configuration.

SAS RAID controllers are commonly used in servers and enterprise storage environments where multiple drives must be managed through a dedicated storage controller.

Important specifications to compare include:

• Number of internal or external ports
• SAS generation and transfer speed
• Supported RAID levels
• PCIe interface
• Cache memory
• Drive compatibility
• Server compatibility
• Controller firmware

Products in the SERP include both 6Gb/s SAS RAID controllers and 12Gb/s RAID controllers, showing that interface speed is an important comparison factor for buyers.

SATA RAID Controllers

A SATA RAID controller is used to connect and manage compatible SATA drives in a RAID configuration. SATA RAID cards may be suitable for servers, workstations, or storage systems using SATA HDDs or SSDs.

When comparing SATA RAID controllers, check the supported SATA generation, number of ports, RAID levels, host interface, drive capacity support, operating-system requirements, and compatibility with your server or motherboard.

Some controllers support both SAS and SATA drives, making them useful for systems that require broader storage compatibility.

NVMe RAID Controllers

NVMe RAID controllers are associated with high-performance storage systems using NVMe solid-state drives. They differ from traditional SAS and SATA controllers in architecture and compatibility requirements.

Before choosing an NVMe RAID controller, confirm that your server platform, PCIe configuration, backplane, drives, firmware, and operating environment support the controller.

Because NVMe storage configurations can vary significantly between platforms, selecting a controller based only on connector type or PCIe generation is not recommended.

PCIe RAID Controller Cards

Most modern RAID controller cards connect to the server through a PCI Express interface.

Common specifications may include PCIe x8 connections and different PCIe generations. The PCIe interface affects how the RAID controller communicates with the host system, while SAS, SATA, or NVMe describes how storage devices are connected or managed.

When comparing a PCIe RAID controller, consider both sides of the connection:

Server side: PCIe slot, generation, form factor, and compatibility.

Storage side: SAS, SATA, or NVMe drives, ports, cables, and backplane support.

RAID 0, RAID 1, RAID 5, RAID 6 and RAID 10 Controllers

Different RAID controllers support different RAID levels.

Common hardware RAID configurations include:

RAID 0: Combines drives for performance and capacity but does not provide data redundancy.

RAID 1: Mirrors data across drives to provide redundancy.

RAID 5: Uses distributed parity and requires multiple drives.

RAID 6: Uses additional parity compared with RAID 5 and can provide greater protection against multiple drive failures.

RAID 10: Combines mirroring and striping.

Enterprise controllers may also support RAID 50 and RAID 60.

The supplied SERP specifically associates controllers such as Dell PERC products with RAID levels including 0, 1, 5, 6, 10, 50, and 60.

Always verify the exact RAID levels supported by the specific controller model before purchase.

RAID Controller Cache and Data Protection

Many hardware RAID controllers include onboard cache memory to help manage storage operations.

Depending on the controller family, cache protection may involve batteries, flash-backed write cache, or other manufacturer-specific technologies. Products within the HPE Smart Array ecosystem, for example, may use terminology such as FBWC, or Flash-Backed Write Cache.

Cache size alone should not determine your purchase. Server compatibility, workload, firmware support, RAID level, drive interface, and data-protection design are also important.

RAID Controller Port Count

RAID controller cards are available with different port configurations.

Common product descriptions include:

• 4-port RAID controllers
• 8-port RAID controllers
• 16-port RAID controllers

The right port count depends on the number of drives, expander configuration, cabling, backplane, and server design.

An 8-port SAS RAID controller, for example, does not automatically mean that every server can connect eight drives directly. Always review the complete storage architecture.

RAID Controller Compatibility

Compatibility is one of the most important factors when buying a RAID controller.

Before ordering, check:

• Server manufacturer
• Exact server model
• Server generation
• RAID controller part number
• PCIe interface
• Controller form factor
• SAS, SATA, or NVMe support
• Drive type
• Backplane compatibility
• Internal or external connectors
• Required RAID level
• Firmware support
• Operating-system requirements

The commercial results and AI-generated SERP information strongly connect RAID-controller selection with the server brand and model, drive type, and required RAID level.

For example, a controller designed for one Dell PowerEdge generation should not automatically be assumed to work with every Dell server. The same principle applies to HPE Smart Array, Cisco, Intel, Supermicro, and other server platforms.

RAID Controllers for SAS, SATA, HDD and SSD Storage

RAID controllers can manage different storage devices depending on their hardware and firmware capabilities.

A controller may support:

• SAS hard drives
• SATA hard drives
• SAS SSDs
• SATA SSDs
• NVMe SSDs on compatible NVMe platforms

Always verify both the drive interface and the server storage architecture.

A SAS/SATA controller should not be treated as an NVMe controller unless the manufacturer specifically states that NVMe is supported.

RAID Controller vs HBA

A RAID controller and a Host Bus Adapter (HBA) are related storage components, but they are not always used in the same way.

A hardware RAID controller can create and manage RAID arrays directly through the controller.

An HBA generally provides direct connectivity between the host system and storage devices. Some storage environments prefer HBA or IT-mode operation so that software such as ZFS can manage the disks more directly.

The SERP connects the LSI 9211-8i HBA with IT-mode firmware and software-defined storage environments such as ZFS, FreeNAS, and unRAID.

If your system uses software-defined storage, verify whether you need hardware RAID functionality or an HBA operating in the appropriate mode.

New, Used and Refurbished RAID Controllers

RAID controllers are available in new, used, pre-owned, and refurbished conditions across the market.

The right choice depends on your server, budget, required part number, support expectations, and availability.

For older servers, a compatible refurbished RAID controller may provide access to a specific legacy part number that is no longer commonly available as new hardware. For newer systems, buyers may prioritize current controller generations and newer storage interfaces.

Regardless of condition, verify the exact model and technical compatibility before buying.

How to Choose the Right RAID Controller

Choosing the best-fit RAID controller starts with your existing hardware rather than the controller name alone.

1. Identify Your Server

Check the server manufacturer, model, generation, and available controller slot.

2. Identify Your Drives

Determine whether your system uses SAS, SATA, or NVMe drives.

3. Choose the Required RAID Level

Confirm whether you need RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, or another supported configuration.

4. Check the Number of Drives

Compare the controller's ports and storage architecture with the number of drives you plan to connect.

5. Check Interface Speed

Compare specifications such as 6Gb/s or 12Gb/s SAS, along with the controller's PCIe interface.

6. Compare Cache

For workloads that benefit from hardware RAID cache, review cache capacity and protection technology.

7. Verify Part Numbers

Similar controller names may represent different revisions or server-specific variants. Check the manufacturer part number whenever possible.

8. Verify Firmware and Driver Support

Confirm that appropriate firmware and drivers are available for your operating environment before installing the controller.

Buy RAID Controllers from iTech Devices

iTech Devices offers RAID controllers and related storage hardware for customers looking for server replacement parts, storage upgrades, and RAID solutions.

Browse the available Dell RAID controllers, HPE Smart Array controllers, LSI RAID cards, Broadcom MegaRAID controllers, SAS RAID controllers, SATA RAID controllers, PCIe RAID cards, and compatible server storage controllers.

When comparing products, use the exact specifications and part numbers to find the RAID controller that matches your server and storage requirements.

FAQs

Can a RAID controller support both SAS and SATA drives?

Some SAS RAID controllers support both SAS and SATA drives, but support varies by model, firmware, server, backplane, and configuration. Always check the controller specifications.

What RAID levels do hardware RAID controllers support?

Support depends on the controller. Common RAID levels include RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10, while some enterprise RAID controllers also support RAID 50 and RAID 60.

How do I know which RAID controller is compatible with my server?

Start with the server brand, exact model, generation, drive interface, backplane, PCIe configuration, controller form factor, part number, firmware, and required RAID levels. Manufacturer compatibility information should take priority over assumptions based only on brand.

Which is better, a 6Gb/s or 12Gb/s RAID controller?

They represent different interface generations and potential bandwidth capabilities, but the appropriate choice depends on the drives, server, backplane, workload, and complete storage system. A higher interface rating alone does not guarantee that every workload will run twice as fast.

Can I use SSDs with a RAID controller?

Many RAID controllers support SSDs, but compatibility varies by drive interface and controller model. Check whether the controller and server support SAS SSDs, SATA SSDs, NVMe SSDs, or the specific drive type you plan to install.