Physical server - Dell PowerEdge 520 with H710 Raid Controller
Host OS - 2012 R2 fully updated and only Hyper-V service running
Host OS can copy data between logical volumes at high rates of speed - 200 MB/s upwards
Server has all SAS 10k RPM drives
Server is brand new
Guest OS 1 - 2012 R2 fully updated with AD, DHCP and DNS running
Guest OS 2 - 2012 R2 fully updated with Exchange 2013 running
Everything functions perfectly with regard to applications and core functionality.
Problem - data transfer to Guest OS (either including random test VM) is beyond terribly slow. Transfer speed is in the bytes and might sometimes get as high as 3-4 Mb/s.
Guest to Guest same thing. Host to Guest same thing.
Host B volume to Host C or D volume extremely fast.
VM Hard Drive is VHDX (tried fixed and dynamic)
Tried Generation 1 with IDE controller
Currently running Generation 2 with SCSI controller
Tried changing the channels for the SCSI drives and making sure they're unique
Currently updating Firmware and Drivers for RAID controller.
What am I missing??? I have never seen performance this poor. My test lab is the same setup and is lightning fast between Host and Guest.