Thread: raid pci card
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Old 3rd June, 2005, 01:38 PM
Aedan Aedan is offline
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Join Date: September 2001
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RAID is a technology that's been around for a while, but originally was designed for big servers. To give you context, it stands for "Redundant Array of Inexpensive Disks". Basically, it's a way of talking to disks that combines them into one disk. Many RAID configurations are actually redundant, in that a hard disk can fail and the system carries on working.

Common RAID "levels" are:
RAID0: Two or more disks combined into a single 'volume'. No redundancy, but you get all your space. Hence 2x 80Gb disks give 160Gb of space.
RAID1: Two or other even number of drives combined into a single 'volume'. Drives are in 'mirrored' sets, so there's always two copies, but you only get half your space
RAID5: A complex system that requires at least 3 drives, and splits data and error correction across the drives. Any one drive can fail, and the system will be ok. You get the space of all but one drive.
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