Raid 5 - Asus PCI-DA2100 User Manual

Pci-to-scsi ultrawide raid controller card

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ASUS GUI RAID Manager: RAID Levels

Logical Drive

RAID 5

RAID 5 implements multiple-block striping with distributed

parity. This RAID level offers the same redundancy available in

RAID 3; though the parity information this time is distributed

across all disks in the array. Data and relative parity are never

stored on the same disk. In the event a disk fails, original data

can be reconstructed using the available parity information.

For small I/Os, as few as one disk may be activated for improved

access speed.

RAID 5 offers both increased data transfer rates when data is

being accessed in large chunks or sequentially and reduced total

effective data access time for multiple concurrent I/O's that do

not span multiple drives.

Physical Disks

Parity (1,2)

Parity (3,4)

Parity (5,6)

Parity (7,8)

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