D-Link DNR-322L User Manual page 73

Section 7 - Knowledge Base
Upgrading from Standard Mode to RAID 1
Standard Mode doesn't offer any redundancy or security of data. If, after formatting for Standard Mode you find that you
require the additional features of RAID 1, it is best then to migrate from Standard Mode to RAID 1. To do this, follow these
instructions:
Insert a second hard drive into the DNR-322L as per the instructions for the
initial installation. The existing hard drive should be the volume which you
wish to create a mirror of using the RAID 1 format.
Replace the top cover and restart the DNR-322L.
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