Hi-Rely RAIDPac-II Betriebshandbuch - Seite 11

Blättern Sie online oder laden Sie pdf Betriebshandbuch für Lagerung Hi-Rely RAIDPac-II herunter. Hi-Rely RAIDPac-II 20 Seiten. Removable backup hard drive

Seite drucken
RAID Type
(*= settable in HW Manager only, may not
apply to use in RP2)
0
1
*10
11
Copyright © 2011 by Highly Reliable Systems. All rights reserved.
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