Data transfer speed is slow from server1 to server2

The data transfer between server1 and server2 involves file copying over the network using TCP/IP via Ethernet.
There are no SAN or external storage devices involved in this process, so the storage team’s assistance is limited.

To improve transfer speed, consider using the backup LAN, provided both systems are on the same VLAN — this can significantly enhance throughput.
Use the hostnames server1b and server2b for data transfer, where “b” refers to the backup LAN interface.

Alternatively, you can mount the file system of server1 as read-only on server2 over the backup LAN (depending on accessibility) and then start copying the data directly.