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Slow network/disk performence in Nested esxi 5.5..

Hi. Performence issues!

Running a ESXi 5.5 lab (nested) on a Dell Poweredge t20, and then speeds are Intel Pentium G3220 3.1 GHZ and 20 GB of RAM.

Running 8 VMs that are idle.

Server 2012r2 - DC 512 MB ram

Server 2012r2 - Edge 1 GB RAM

Server 2012r2 - Svr1 1 GB RAM

Server 2012r2 - DC/DNS 512 MB RAM

vCenter Appliance ver 5.5 4 GB RAM

ESXi1  GB RAM

ESXi2 4 GB RAM

When i transfer files to my NAS from my Computer I get 906 mbit. When I am using my NAS as iSCSI or NFS share, and creates a VM on the server I get like < 10 MB sec (megabytes per sec), and that is very slow. Deployed vcloud appliance before, and it took 40 min, and  the appliance is 1.8 GB. Installing Windows7 on a share storage takes for ever to, 40-50 min. The drives I am using on the NFS/ISCSI share are Samsung SSD.

Anyone have any idea why I get such a slow transfer rates?

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