PowerCLI Copy-DatastoreItem Performance Problems

Hello,

wrote a short testscript for coping VM Folder from VMFS datasore to locale File folder.

for File copy i used Copy-DatastoreItem cmdlet.

"Copy-DatastoreItem vmstore:\ha-datacenter\xxxxesx02_datastoreName\DataFolder\* E:\VM\VMName\"

worked fine, but performance is not as expected.

Datarate is onl y15 MB/s.

When I use "Download a file from this datastore to yorr locale machine" in VI-Client on the same VM, i get tripled datarates, allmost more as 50MB/s.

So limitations seem really in "Copy-DatastoreItem" cmdlet.

Vshere Version ESXi 4.1 UP2 HP Image

VM Hardware Version7.

VM OS is W2008 R2 standard.

Powershel 20_w02008_64 and PowerCLI-5-0-0-435426.

Can anyone help.