LaCie hard disk MAX
• DESIGN BY NEIL POULTON
RAID
User Manual
page 21
5. RAID
This section will help you decide which RAID mode is right for your
application. For instructions on how to adjust the RAID mode,
refer to section
5.3. Changing the RAID Mode
.
TECHNICAL NOTE:
Capacity varies depending upon RAID
mode.
FAST (RAID 0)
= 100% total accessible capacity at high transfer
rate
SAFE (RAID 1)
= 50% CAPACITY
5.1. FAST (RAID 0)
FAST (also called RAID 0 or “Spanning” in some LaCie devices),
allows for the fastest data transmission and capacity of the dif-
ferent RAID settings. Requiring at least 2 drives, RAID 0 stripes
data onto each disk (
Fig. 15
). The available capacities of each
disk are added together so that one logical volume mounts on
the computer.
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.
IMPORTANT INFO:
In FAST mode, if one physical disk fails,
the data of both disks become inaccessible.
RAID 0
A1
B1
C1
D1
A2
B2
C2
D2
Disk 1
Disk 2
Fig. 15
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 ex-
ample) and should not be used as a single storage back-
up solution or on mission critical systems.
