Справочник Пользователя для ASUS PIKE 2108

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Chapter 2: RAID configuration

The RAID card supports RAID 0, 1, 10, 5, 50, 6, and 60.

RAID 0 

(Data striping) optimizes two identical hard disk drives to read and write 

data in parallel, interleaved stacks. Two hard disks perform the same work as a 

single drive but at a sustained data transfer rate, double that of a single disk alone, 

thus improving data access and storage. Use of at least two new identical hard 

disk drives is required for this setup.
RAID 1 

(Data mirroring) copies and maintains an identical image of data from one 

drive to a second drive. If one drive fails, the disk array management software 

directs all applications to the surviving drive as it contains a complete copy of 

the data in the other drive. This RAID configuration provides data protection and 

increases fault tolerance to the entire system. Use two new drives or use an 

existing drive and a new drive for this setup. The new drive must be of the same 

size or larger than the existing drive.
RAID 10 is a striped configuration with RAID 1 segments whose segments are 

RAID 1 arrays. This configuration has the same fault tolerance as RAID 1, and 

has the same overhead for fault-tolerance as mirroring alone. RAID 10 achieves 

high input/output rates by striping RAID 1 segments. In  some instances, a RAID 

10 configuration can sustain multiple simultaneous drive failure. A minimum of four 

hard disk drives is required for this setup.
RAID 5

 stripes both data and parity information across three or more hard 

disk drives. Among the advantages of RAID 5 configuration include better 

HDD performance, fault tolerance, and higher storage capacity. The RAID 

5 configuration is best suited for transaction processing, relational database 

applications, enterprise resource planning, and other business systems. Use a 

minimum of three identical hard disk drives for this setup.
RAID 50 is a combination of RAID 0 and RAID 5. It uses distributed parity and disk 

striping and works best with data that requires high reliability, high request rates, 

high data transfers, and medium-to-large capacity.
RAID 6 uses distributed parity, with two independent parity blocks per stripe, and 

disk striping. A RAID 6 virtual drive can survive the loss of two drives without losing 

data. A RAID 6 drive group, which requires a minimum of three drives, is similar to 

a RAID 5 drive group. Blocks of data and parity information are written across all 

drives. The parity information is used to recover the data if one or two drives fail in 

the drive group.
RAID 60, a combination of RAID 0 and RAID 6, uses distributed parity, with two 

independent parity blocks per stripe in each RAID set, and disk striping. A RAID 60 

virtual drive can survive the loss of two drives in each of the RAID 6 sets without 

losing data. It works best with data that requires high reliability, high request rates, 

high data transfers, and medium-to-large capacity.