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Friday, February 24, 2012

What are RAID controllers?

Definition: A RAID controller is a hardware device responsible for managing physical drives in a system and presenting them to the computer as logical units. 
The setting up of RAID 0 and RAID 1 can be done either via software or hardware. Some operating systems allow you to setup RAID in the software itself. A better option is to have a dedicated piece of hardware controlling the RAID functions. A guide to software RAID in Linux.

RAID controller chips are often imbedded in the motherboard. They also come in the form of a PCI expansion cards.  

Hardware RAID You need to ensure that the RAID controller card is designed for the type of hard disks you are using. A RAID controller card designed for use with IDE hard disks will not take SCSI hard disks. A controller designed to provide just RAID 0 functions will not allow you to set up a fault tolerant array


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