D-Link DSN-610 Quick Installation Manual page 7

Step 4
Power off DSN-6110 or DSN-6410 by switching power button. Remove the empty cage by
loosen the screws and ejection levers.
Screws& ejection levers
Power switch
Step 5
Insert the second controller to the IP SAN storage and secure in place, then power on the
system.
The IP SAN storage should now appear in dual controller mode as either DSN-6120 or
DSN-6420.
Go to "Maintenance\System information" to check that the IP SAN storage is running in
dual controller mode now.