LaCie 2big USB 3.0
•
DESIGN BY NEIL POULTON
RAID
User Manual
page 16
3.1.3. RAID 1 (SAFE - Data protection)
In RAID 1, the two physical disks are mirrored together so that one
single logical volume mounts on the desktop. Please note that the
combined storage will not exceed the available capacity of the
lowest-capacity single disk.
All data is saved simultaneously on each disk (
Fig. 12
). If one
physical disk fails, the data is available immediately on the second
disk. No data is lost if one disk fails.
3.1.3.1. Rebuilding the RAID 1 Mirror on a
Replacement Disk
LaCie highly recommends inserting a replacement disk while the
2big USB 3.0 is powered on. The RAID 1 will recognize the disk
and automatically mirror the data from the active drive.
You may encounter difficulty rebuilding the RAID 1 mirror when
inserting a replacement drive while the 2big USB 3.0 is off. Try to
re-insert the replacement disk while the 2big USB 3.0 is powered
on.
Applications
✦
Maximum data safety
✦
RAID 1 reduces the total available capacity by 50%
because two copies of the data are saved.
Disk 1
Disk 2
A1
B1
C1
D1
E1
A1
B1
C1
D1
E1
Fig. 12
CAUTION:
Your LaCie 2big USB 3.0 comes preconfigured in
RAID 0, which provides faster transfer rates and allows access to
the whole storage capacity. Unlike RAID 1, it does not provide any
security. If a drive fails, all data will be lost. If you are concerned
about data security, LaCie highly recommends changing your
2big USB 3.0 to RAID 1. See section
3.1. About RAID Modes
, for
more information.
