LaCie 4big Quadra Enterprise Class handleiding

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Handleiding

LaCie 4big Quadra Enterprise Class • Design by Neil Poulton RAID

User Manual page 14

3. RAID

3.1. About RAID Modes

This section will help you decide which RAID mode is right for your

application.

3.1.1. RAID 0

RAID 0 (also called FAST mode in some LaCie devices), is the fast-

est RAID mode. Requiring at least 2 drives, RAID 0 stripes data onto

each disk (Fig. 07). 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.

RAID Number RAID Mode Capacity Protection Speed

0 RAID 0 100%

1 RAID 10 50%

2 Concatenation 100%

3 RAID 3 75%

4 RAID 3+Spare 50%

5 RAID 5 75%

6 RAID 5+Spare 50%

7 N/A (no RAID changes will take effect if 7 is selected)

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 storage backup.

RAID 0

Disk 1 Disk 2 Disk 3 Disk 4

Fig. 07

IMPORTANT INFO: Data recovery is not possible when using

RAID 0.

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