LaCie 2big Quadra Enterprise Class
• D
esign
by
n
eil
P
oulton
RAID
User Manual
page 17
3.1.4. Mixed (RAID 1 and RAID 0)
In Mixed mode, the two physical disks are combined so that two
logical volumes mount simultaneously on the desktop (
Fig. 10
):
✦
One Safe volume (RAID 1) where data is automatically mir-
rored on each physical disk. This volume uses 50% of the
available capacity of each disk (the available capacity cannot
exceed 50% of the lowest-capacity single disk).
IMPORTANT INFO:
If one physical disk fails, the data of the SAFE
volume is available on the second disk. Only 25% of full capacity
is protected by mirroring. In this case, data on the Fast (RAID 0)
volume will be lost.
✦
One Fast volume (RAID 0) enables the user to work with the
high speed of RAID 0.
Applications
✦
Provides two volumes for different data security needs.
✦
Only 75% of total formatted capacity is available due
to mirroring on the Safe volume.
Disk 1
Disk 2
D1
E1
F1
D2
E2
F2
A1
B1
C1
A1
B1
C1
Fig. 10
Volume 1
RAID 1
Volume 2
RAID 0
