Rosewill RX200R-APU3-25B, User Manual

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Right Click the Disk1 icon, run the same process : [Delete
Partition]-[New Partition]-[New Logical Disk]. When finish this step,
the disk1 will show [Healthy] at the [Disk Manager] window as below,
now you can use it.
4. Raid1 Function MOde
Please move Mode Selective Switch till the position that just
under RAID1 mark. Connect power supply with product
properly (Not allowed to connect USB3.0 Cable at the same
time), Hold RESET button, And power on product, after holding
button with continuous 5 seconds, Product will switch to RAID1,
connect USB3.0 cable, product will work well under RAID1
mode.
The Raid1 storage policy stores all data in duplicate on seperate
drives to protect against data loss due to drive failure. One drive
mirrors the other at all times, equivalent to RAID1. Every write
operation goes to both drives. RAID1 provides the highest level of
data protection for critical data that you cannot afford to lose if a hard
drive fails, but halfves the amount of storage capacity because all
data must be stored twice. The resulting storage capcity of the
virtual RAID`1 volume will be equivalent to the size of one hard drive
(if both drives are the same) or the smaller of the two drives( if they
are different)