HP Proliant ML350 G9 slow network access

Hello,

We just configured a HP Proliant ML350 G9 with Windows Server 2012 R2, which hosts one virtual server using Hyper-V. However it looks like the read and write operations to/from the host are quite slow. 

For example:

1. It takes about 5 seconds to write a file from the host to the a network share, and also 5 seconds to read it.

2. It takes about 5 seconds to write a file from the network to the host, and also 5 seconds to read it.

I have test this with virtual server turned of, and turned on - it does not affect network transfers. I disalbed the Virtual machines queues - does not change the results.

I will appreciate any help :)

Thank you,

Daniel