Performance of external USB disk with ESXi5
- by PeterMmm
I have a new HP DL120 G7 server with ESXi5. One VM is a Win2003 instalation and I have an external USB2.0 drive attached by USB Controller and USB Device.
I copy a 4GB file from external USB to server disk.
In the VM that takes up to 10 minutes.
On a native Win2003 that takes aprox. 3 minutes.
I have no explaination for that diference:
In any case the bottleneck is the USB connection, much slower than
the disks (SAS, RAID1).
If the USB connection on the VM would be USB1.1 and not USB2.0 it would take much
more time.
(The disk performance between server partitions on the VM is correct. - see update)
Could be that my native box is extremely fast and the VM is the normal case.
???
Update
I try with passtrough and a first run copy the same data in aprox. 7 minutes. Still 2 times slower than the native connection.
I also did another messure and the copy between partitions on the same VM takes 3 minutes.