RAID Flashcards
RAID
Redundant Array of
Inexpensive Disks
What does RAID do?
Configures two or more hard drives to work together as an array of drives
Fault tolerance
Computer’s ability to respond to a fault or catastrophe, like hardware failure or power outage.
Spanning
Uses two hard drives When one drive is full data is written to second drive
JBOD
Just a bunch of disks
RAID 0
Uses two or more physical disks. Writes to physical disks evenly across all disks so that no one disk receives all activity. Windows calls RAID 0 a striped volume
RAID 1: Mirroring
Duplicates data on one drive to another drive and is used for fault tolerance (mirrored volume)
RAID 5
Uses three or more drives. Stripes data across drives and uses parity checking. Data is not duplicated
RAID 10
RAID 1+0 (pronounced RAID one zero) Combination of RAID 1 and RAID 0.Takes at least 4 disks