RAID
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RAID
Redundant Array of Independent Disks

Describe Raid 0
 Striping.
 Minimum number of disks: 2
 Maximum number of disks: 2
 Read: Great
 Write: Great
 Overhead: 50% (1 disk)
 No redundancy

Describe RAID 1
Mirroring (Exact copy on each disk)
 Minimum number of disks: 2
 Maximum number of disks: 2
 Read: Good
 Write: OK (stock)
You can loose up to one disk

Describe Raid 5
Striping + Parity
 Minimum number of disks: 3
 Maximum number of disks: infinite (controller maximum)
 Read: Good
 Write: OK (stock)
You can look up to one disk

Describe Raid 6:
Striping + Double Parity
 Minimum number of disks: 4
 Maximum number of disks: infinite (controller maximum)
 Read: OK
 Write: Slow
You can loose upto two disks

Describe RAID 10
Striping+ Mirroring
 Minimum number of disks: 4
 Maximum number of disks: infinite (controller maximum)
 Read: Great
 Write: Good
you can loose2 disks (50% best case; 1 drive worst case)