After an update to OSX 10.13.4, the Mac may crash or not work when SANLink 2 is conected. This might be a driver issue and could be fixed by removing the driver and reinstall the latest driver version again.
To delete a driver, see following Terminal command as an example (please note the file name might be different):
sudo rm -rf /Library/Extensions/SANLink2-10GE.kext
After removing a driver successfully, go to Promise website to download and install the latest driver again: https://www.promise.com/support. It might take several Mac reboots to make it work.