From Single Controller To Dual Controller - D-Link DSN-6020 User Manual

C. From single controller to dual controllers
This SOP applies to upgrading from the DSN-6410 to DSN-6410 with DSN-640. Before you
do this, please make sure that the DSN-6410 is properly installed according to the
NOT SAS
manuals, especially the HDD trays. If you are using hard drives, you need to use
HDD trays with either multiplexer board or bridge board to install your HDDs in order to
utilize the dual controller mode features. Otherwise, the IP SAN system will not be able to
recognize the HDDs.
Before you can insert the second controller to the IP SAN storage, the IP SAN storage
system should be up and running and looks like the following screenshot in
"Maintenance\System". Note that the status is single and you have one controller only.
You can also verify controller mode in "Maintenance\Upgrade". Check out the "Controller
Mode" section.
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