WDS is slow to deploy

Recently setting up a VM deployed via WDS and it was very slow.  My WDS setup is windows 2008 server with two hard drives attached both on different data stores. The main drive is on one datastore and the drive holding the images/boot and wim files are on the second data store. The data stores are two 8 TB raid 5,  Dell MD3220 connected by SAS cable. The VM I was setting up was on another ESXi host and the install was taking a long time to expand. I have determined with the help of someone here that WDS is having a problem with read performance or network issue but I am unsure what is wrong. The time it took to setup the VM with an ISO, 5 mins. Using WDS I was two hours into it and barely at 30%
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stlhostAuthor Commented:
This has long been since solved by moving it to a stand alone host. To many variables to solve.
Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:

I had a similar problem and it was related to network, when checking the configured speed on the bios I find that only 10/100 Mb available options instead of 1G working at the OS level. the expend of WIM toke 10 hours before the Windows setup start!!!

So check the network configuration

Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Are you using the VMXNET3 interface in BOTH server and Workstation VMs.

VMware Tools is required to support this interface in the OS.

This interface supports 10GBe, and is much faster, and recommended that the standard E1000 interfaces, which are only used for installation usually.

We use VMXNET3 in our WDS servers, and workstations.
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stlhostAuthor Commented:
Yes both are using VMXNET3
Can you upload stats on the VM...
Number of vCPUS...
Memory ...
Reservations CPU/Memory
Amount of free CPU and memory resources on the host?
Are you using A SAN?
stlhostAuthor Commented:
Couldn't find any solution that worked because to many variables
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