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MoreCore
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Contributor

USB 3.0 on ESXi disappointing speeds

Greetings,

I've been doing some speed testing with a USB 3.0 external HDD using LAN Speed Test Lite.  You can point to local HDD when using LAN Speed Test to check local speeds and not go over the network.

When I plug this drive into a Win10 PC

Write = 604 Mbps

Read = 1,416 Mbps

However when I do the same test with this drive on our ESXi 6.0.0 3620759 HP ProLiant DL380 G7

Write = 412 Mbps

Read = 763 Mbps

What I'm doing on the VM side is I added the USB xHCI controller to a VM that is on this ESXi host.  I then added the USB Device to the VM.

I've tried updating to the VM Hardware version (11) and did not notice much of a change.  Is there anything else I can do to try to push the speeds up a little closer to what I'm seeing on a local PC?

Thanks

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