Hello everyone,

I have a ESXi server (dual quad core, 8GB of DDR3 ram, 6x 1TB WD Blacks running in RAid 5 on the PErc 6/i controller.

I have a 64bit freenas VM running, on this VM I keep about 200Gigs of stuff that my windows machines access.

every now and then the throughput of this VM just dies, for example right now it can't even handle streaming a song and when I tried to transfer a folder the speed goes from 10-400KB/s.

Might I add at this point that the ESXi box has dual gigabit network cards plugged into a good solid gigabit switch and other linux and windows VM's are just fine I have seen speeds over 90MB/s (frequently)

The server still has ram left over (plenty actually) and cpu is very low (500-1000mhz)

any ideas what could cause this?

thanks.

Luc