Proware Epica, Руководство пользователя

Страница: 18 / 240

NAS System
18 User Manual
1.4 Array Definition
1.4.1 Array
An Array is a group of physical disks (disk drives) containing one or more Volumes.
When an Array is created, the RAID Level is assigned. RAID Level refers to the level of
data performance and protection of an Array.
It is impossible to have multiple Arrays on the same physical disks. If physical disks of
different capacity are grouped together in an Array, then the capacity of the smallest
disk will become the effective capacity of all the disks in the Array.
1.4.2 Volume
A Volume is seen by the host system as a single logical device. A Volume must be
created on an Array. If there is an existing Array and there is available free raw
capacity, then a new Volume can still be created.
A Volume capacity can consume all or a portion of the capacity available in an
Array. Multiple Volumes can exist on a group of disks in an Array. Additional
Volumes created in an Array will reside on all the physical disks in the Array. Thus
each Volume on the Array will have its data spread evenly across all the disks in
the Array.