I have this whitebox with ESXi. It has a Intel DG33TL mobo, 320GB SATA disk connected to the onboard ICH10 controller (which hold my VM's), and 3 1TB disks connected to a Dell Perc 5/i in raid-5 (This holds my data).
When I copy a 3GB ISO file from the raid set to the sata disk, the average disk transfer is 50MB/sec. This puzzles me, because the SATA disk can do 100MB/sec easy. When I start a second copy, the average disk transfer doubles to 100MB/sec.
So it seems ESXi is capping the disk transfer for some reason, because 2 copy jobs do fully utilize the max speed of the SATA disk. Even further, when I start a 3rd copy, disk transfer increases to approx 113MB/sec (which is the limit of the disk, I think).
So, why do I not get the full disk transfer speed when only copying 1 file? I would expect 100MB/sec or so for 1 filecopy, and when 2 files are copied, 50MB/sec each (distributing the available transfer speed over multiple jobs).
Any ideas?
File transfer speeds are capped in the console so you will not be able to get maximum speeds
Virtualization Architect & Systems Administrator
Aha! Is there a way to "uncap" this?
i`d open a SR for this.
also have a look at http://communities.vmware.com/message/1284934