As long as the FW version on both boxes is the same you should not have any problems, so check that first. Save your configuration of the old NSS to a USB flash drive then just power down the NSS and transfer the drives (both boxes powered off) to the new box. After powering up the new unit restore your configuration file and reboot. You should not have to do anything else.
Firstly I seem to remember that when I initially powered up the first unit it automatically formatted the drives and created the RAID - this would obviously be bad when transferring disks to the new chassis!
Secondly, I tried saving the config to the hard disk, but cannot see where it has put the config file (*). I note that you recommend using a USB stick. Do you restore the config to the new drive before or after transferring disks (or does it matter)?
(*) - On the Admin->Configuration page the only option I have for 'Stored Configuration Location' in the drop down box is 'RAIDA - DATA'; where RAIDA is the name of the RAID, and DATA is the name of the volume.
Article ID:1717 Time Machine Backup on NSS300 Smart Storage Series
Objective This document explains the steps for Time Machine Backup. The
Network Attached Storage (NAS) is used as one of the destinations for
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Storage Objective The NSS devices have two types of System Resets: Basic
and Advanced. An understanding of both of these resets will allow the
user to recover from unpredictable situatio...
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(Except NSS322) Objective RAID stands for Redundant Array of Independent
Disks. RAID 5 combines three or more disks in a way that shields the
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