I have two servers connected to a PowerVault MD3820i via ISCSI (1Gbit).
The first server is running Windows 2008 R2 while the second is running Windows Server 2019. They are virtual servers hosted on the same physical server, the technical configurations are identical (network, CPU, RAM).

Everything was working fine until now.
On April 2nd, I rebooted the servers following a maintenance on the physical server.

Since this reboot, my server under windows 2019 is not working well. The connection to the MD3820i is extremely slow, or even stops.
The server under Windows 2008R2 still works perfectly.

The MD3820i firmware is up to date.

Does anyone have an idea how to solve this problem?

Thanks !