The LAN port is broken due to a lightning storm and I can’t connect to the unit.
Where can I buy a new controller?
Is there any issues when replacing a controller regarding access to data on the existing drives?
Lightning storms don’t break things … they fry / incinerate things with a massive electrical surge and usually everything else connected.
Best to disassemble it and remove the hard drive and connect to a PC and using a Linux Live CD/USB (Hard drive is EXT File system) see if the drive still functions and if by some miracle it does, you’ll be able to recover the data
If it doesn’t function then you’ve saved yourself time and money hunting down a controller.