Server-based RAID vs. controller-based RAID
What is the difference between server-based RAID and controller-based
In general, server-based RAID
can have either software-based
or operating system-based functionality. Software-based RAID is often implemented using a volume
manager. RAID can be implemented on a server using a hardware adapter card equipped with RAID
functionality to offload the server of RAID processing. RAID is also commonly implemented in a
storage system via a storage controller, which is also known as a RAID controller.
The primary difference between server-based RAID and controller-based RAID is where the RAID
functionally is performed and implemented.
Sometimes server-based hardware RAID implementations are referred to as controller-based as
opposed to software-based RAID. Adding to the confusion is that controller-based RAID is also used
referring to RAID functionality being implemented in a storage system via a combination of
hardware, software and firmware or microcode.
This was first published in April 2006