10-31-2013
You apparently have gone from hosting a SCO guest on ESX to hosting a SCO guest on VMware workstation which is running on Server 2008 guest on a Hyper-V host. In my experience of this sort of configuration (thick hypervisor on top of thick hypervisor) you can expect severe I/O performance degradation.
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LEARN ABOUT FREEBSD
hv_netvsc
HYPER-V(4) BSD Kernel Interfaces Manual HYPER-V(4)
NAME
hv_netvsc -- Hyper-V Network Virtual Service Consumer
SYNOPSIS
To compile this driver into the kernel, place the following lines in the system kernel configuration file:
device hyperv
DESCRIPTION
The hv_netvsc driver implements the virtual network device for FreeBSD guest partitions running on Hyper-V. FreeBSD guest partitions running
on Hyper-V do not have direct access to network devices attached to the Hyper-V server. Although a FreeBSD guest can access network devices
using Hyper-V's full emulation mode, the performance in this mode tends to be unsatisfactory.
To counter the above issues, the hv_netvsc driver implements a network Virtual Service Consumer (VSC) that relays network requests from the
guest partition to the network Virtual Service Provider (VSP) hosted in the root partition using the high performance data exchange infra-
structure provided by hv_vmbus(4) driver. The VSP in the root partition then forwards the network related requests to the physical network
card.
SEE ALSO
hv_ata_pci_disengage(4), hv_storvsc(4), hv_utils(4), hv_vmbus(4)
HISTORY
Support for hv_netvsc first appeared in FreeBSD 10.0. The driver was developed through a joint effort between Citrix Incorporated, Microsoft
Corporation, and Network Appliance Incorporated.
AUTHORS
FreeBSD support for hv_netvsc was first added by Microsoft BSD Integration Services Team <bsdic@microsoft.com>.
BSD
September 10, 2013 BSD