2
User's Manual
Safety and Cautions
(1) It is suggested that same type of new hard disk (same brand, same model, same
capacity, same origin and same firmware version) should be used for working
with this product. You may use the ARAID SMART program included on the CD
to examine the quality of the hard disks. However, it is suggested that you should
prepare several of the same and new hard disks for backup. If the same hard disk
is not available, you may use a larger-capacity hard disk of the same brand.
(2) When using the ARAID, you are not required to process the new hard disk (Target
disk) with FDISK and FORMAT steps in advance, and you will be able to execute
the backup of hard disk directly with the automatic rebuilding function.
Fig. 1:
Identifying the Hard Disk
Quality with ARAID SMART
program
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Directions for Use
Introduction of RAID 1 and RAID 0
RAID 1
RAID 0
Purpose
Emphasize the safety
of system & data
Emphasize the
enhancement of data
access performance
Available Capacity
2TB
4TB
Safety
Better
Disregard
Access Performance
Normal
Enhance
Table 1: RAID 1 vs RAID 0 (2TB as example)
(1) RAID 1: Using two hard disks, the usable capacity is one hard disk with backup
mechanism, which emphasize the safety of system and data. If one of the
hard disks is failed, then the other one immediately takes over operation.
(2) RAID 0: Need to use two hard disks at the same time, the usable capacity is twice
of the single hard disk, which emphasize the enhancement of
performance.
