What are the implications of serial number change? Will it cause a reconfiguration of the cluster services?
Yes, it's possible.
We have checked the way to restore the serial number:
1. Before deleting the HA device, copy starwind.cfg file. It contains serial numbers for HA devices.
Find string like <device name="HAImage1"..., it contains serialId value, for example
serialId="51e2c3b5-68e3-4a1e-ab6b-7ea2a8f28fed"
This value is reported to the system. These identifiers are equal for both nodes of one HA device.
2. Disconnect clients, delete HA devices, relocate servers and create devices again with "no synchronize" option.
You'll get synchronized HA devices with new serial numbers.
Make sure you are using the same target names for the devices.
3. Stop StarWind service on the first node, open starwind.cfg file with text editor and change serial numbers to values from old .cfg file.
Start StarWind service and wait for fast sync to be finished.
4. Stop StarWind service on the second node, open starwind.cfg file with text editor and change serial numbers to values from old .cfg file.
Start StarWind service and wait for fast sync to be finished.
5. Connect clients.