(Win Server 2019) Slow Read/Write network shared files using SMB protocol

[Raul Chiarella]

Hello there!

I have a running Windows Server 2019 used as a File Server.
He is having a problem: When reading/writing files via network share (SMB Protocol) the request takes a long time to complete...

This is happening on Office 97-2003 files, PDFs, Solid Works archives, and some other extensions.

Things i tested:
1. HARDWARE - HD, NIC, CPU, Memory. All returned good and positive results... No phisical problems
2. Network: Internal connection and external is OK. Low latency. No loss.
3. Tried accessing those files LOCALLY only - Problem didnt occur.
4. Created the SAME structure using ANOTHER server on the same network - Same OS (Win SRV 2019) with even the SAME BUILD! Problem DIDNT happen.

So, basically this problem is just happening on that specific server. I have no idea on what to do

Does anyone went through this and can give me a little help? A light on the end of the tunnel ...

Thanks in advance...

 

[Neemobeer]

Have you tested the network throughput and disk performance?

 

[Raul Chiarella]

Have you tested the network throughput and disk performance?

Yes.

Didnt returned any problems...

 

[Neemobeer]

Make sure LSO is disabled on the NIC

 

[Raul Chiarella]

Make sure LSO is disabled on the NIC

Hello.

Yes, its disabled alreday.

 

[jesusMT]

Try forcing it to use a different smb version.
Also look at the antivirus.
Or the most obvious option would be rebuilding your file server on top of a new virtual machine. That seems to be an easy fix, actually.