Change connection to servers from direct to FC switch

Hello friends, you need this professional staff, need to have a live network confirmation, need remote access, so your problem is best to contact the corresponding TAC engineer for processing, you can click here to contact the corresponding country Tac engineer, you will get help.

Thank you for the answer! I will have an engineer onsite when installation will be made. My question was to prepare myself for that.
Thank you again!

I checked VMware information and looks like datastores need to be reconfigurated carefully. If do nothing - possible data lost occurred.
If you will do the same - think twice and check triple before reconnecting the storages with FC switches. It also regrade to the changing the FC switch interfaces of the connections of the servers and storages. The pathes must be constant. Or you will need to make some configuration tasks to recover datastore connection with possible datalost.

@songminwang I will write a review after my reconnection. And I will try to use several methods to solve the possible problem. First I will try to remove the datastore from the hosts before reconnection and then get them back, the second thing - is testing the KB solution with GUI and CLI. This should be happen before end of this month.
Here are the links to the VMware site:
1. Describing the possible problem https://communities.vmware.com/thread/604591
2. The solution if problem was appear https://kb.vmware.com/s/article/1011387

Hello!
This Saturday we have made it. The reconnection from the direct connection to the FC switch communication.
At the all ESXi hosts was installed UltraPath software. And we have no problems with reconnection. All FC datastores reconnect successfully.
What we did:
1. Install Ultrapath software to the ESXi hosts.
2. Configure FC switches: create zones with WWPN records of the storages and hosts and activate them.
3. In testing purposes change connection of the one FC cable of one host from direct connection to connection with FC switch. Test vCenter configuration. It find new path and didn't break anything.
4. Power off all the servers and change all FC connections to communicate with FC switches. We need to power them all because of other operations we made at the same time - we replace the ethernet switches and move some servers positions.
5. Power on the servers and check datastores. Everything in this FC datastores was fine.

So I have to say that reconnection can be made online controller by controller without offline of the datastores.