Thecus N2810 Series User Manual page 87

After the RAID volume has been created, you may remove the USB disk until
the next time the system boots. The RAID volume cannot be mounted if the
USB disk with the encryption key isn't found in any system USB port when
the volume is accessed. To activate the encrypted volume, plug the USB disk
containing the encryption key and into any system USB port.
We strongly recommended copying the RAID volume encryption key to a
safe place. You can find the encryption key file from the USB disk in the
following format:
(RAID volume created date)_xxxxxx.key
WARNING
NOTE
RAID volumes with encryption enabled will be displayed with a key lock
symbol next to volume ID name.
7. Quick RAID — Enabling the quick RAID setting is going to enhance RAID
creation time.
NOTE We recommend using the "Quick RAID" setting only if the hard disks are
brand new or if no existing partitions are contained.
Please keep your USB disk in a safe place and also backup the
encrypted key.
There is no way to rescue data back if the
key is lost.
With RAID volume encryption enabled, the system performance will go
down.
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