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 RAIDYou
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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