LaCie 5big Network
RAID and Disks
User Manual
page 51
5.2. RAID 0
RAID 0 (also called Spanning mode in some LaCie devices), is the
fastest RAID mode. In a RAID 0 array, the available capacities of
each disk are added together so that one logical volume mounts on
the computer (
Fig. 84
).
If one physical disk in the array fails, the data of all disks becomes
inaccessible because parts of the data have been written to all disks.
Applications
RAID 0 is ideal for users who need maximum speed and capacity.
Video editors working with very large files may use RAID 0 when
editing multiple streams of video for optimal playback performance.
A RAID 0 array is more suited for actively working with files (editing
video, for example) and should not be used as a single storage
backup solution or on mission critical systems.
How RAID 0 Capacity Is Calculated
Each disk in a RAID 0 system should have the same capacity.
Storage capacity in a RAID level 0 configuration is calculated by
multiplying the number of drives by the disk capacity, or C = n*d,
where:
C = available capacity
n = number of disks
d = disk capacity
For example, in a RAID 0 array with four drives each with a capac-
ity of 1000GB, the total capacity of the array would be 4000GB:
C = (4*1000)
RAID 0
A1
B1
C1
D1
Disk 1
A2
B2
C2
D2
Disk 2
A3
B3
C3
D3
Disk 3
A4
B4
C4
D4
Disk 4
A5
B5
C5
D5
Disk 5
Fig. 84
