Hi-Rely RAIDPac-II Manual de instrucciones - Página 11

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RAID Type

(*= settable in HW Manager only, may not

apply to use in RP2)

*10

Description

RAID 0: Striped, is the segmentation of logically

sequential data, such as a single file, so that

segments can be assigned to multiple hard disks in

a round-robin fashion and thus written

concurrently.

The advantages of RAID 0 are that it achieves

higher performance and capacity by accumulating

each individual hard disks performance and

capacity.

However, if any one hard disk becomes

defective, information stored in the entire RAID0

array will be invalid!

The RAID group controller will make use of the

same smallest size disk space in each hard disk

under RAID 0 condition. For example, if a RAID

0 consists of 5 different size hard disks, the total

size of usable space of this RAID0 will be (the

capacity of smallest size hard disk) X (the number

of hard disks in this RAID0).

RAID 1 : Mirror, is the replication of data onto

separate hard disks in real time to ensure

continuous availability. In a RAID 1 system with

two hard disks, data in a hard disk will be exactly

the same as the data in the other hard disk.

The RAID group controller will also make use of

same smallest size disk space in each hard disk of

RAID 1. That is, the RAID group controller

controller will write data to the same disk space in

each hard disk. When reading data, RAID group

controller will read data from a favored hard disk.

Failure in a hard disk will cause the RAID group

controller to enter a degraded mode. The host

controller still could read/write data normally

without knowing any difference. Once the

defective drive is replaced, the RAID group

controller will then enter auto-rebuild mode

automatically. If there is only some partial defect

in a hard disk, the RAID group controller will

read data from the other healthy hard drive.

RAID 10 (1+0 - mirrored and striped) two