remove the hv_ata_pci_disengage(4) manual
A few months ago, we removed the driver, which was not necessary any longer. Reviewed by: sephe Approved by: sephe (mentor) MFC after: 1 week Sponsored by: Microsoft
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.\" $FreeBSD$
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.\"
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.\" Copyright (c) 2012 Microsoft Corp.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd September 10, 2013
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.Dt HYPER-V 4
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.Os
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.Sh NAME
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.Nm hv_ata_pci_disengage
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.Nd Hyper-V ATA PCI Disengage driver
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.Sh SYNOPSIS
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To compile this driver into the kernel, place the following lines in
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the system kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device hyperv"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver prevents the native
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.Fx
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ATA driver from
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loading in the presence of Hyper-V.
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.Fx
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guests running on Hyper-V can take advantage of the Hyper-V Storage
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Virtual Consumer
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.Pq Xr hv_storvsc 4
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for using their IDE devices.
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Since the ATA
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driver serves IDE devices as well, there is a chance that the ATA driver may
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interfere with the operations of
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.Xr hv_storvsc 4 .
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The
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.Nm
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driver avoids
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conflicts between the ATA driver and
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.Xr hv_storvsc 4
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by disabling the ATA driver
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when the
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.Fx
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guest is booting.
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.Pp
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A side effect of disabling the ATA driver is that CDROM may become
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inoperational on
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.Fx
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guest partitions.
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If CDROM access is a must then users may use
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"set hw.ata.disk_enable=1" at boot time to prevent the ATA driver from being
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disabled.
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.Sh SEE ALSO
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.Xr hv_netvsc 4 ,
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.Xr hv_storvsc 4 ,
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.Xr hv_utils 4 ,
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.Xr hv_vmbus 4
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.Sh HISTORY
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Support for
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.Nm
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first appeared in
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.Fx 10.0 .
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The driver was developed through a joint effort between Citrix Incorporated,
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Microsoft Corporation, and Network Appliance Incorporated.
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.Sh AUTHORS
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.An -nosplit
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.Fx
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support for
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.Nm
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was first added by
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.An Microsoft BSD Integration Services Team Aq Mt bsdic@microsoft.com .
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@ -74,7 +74,6 @@ the interface that facilitate high performance bi-directional communication
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between the VSCs and VSPs.
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All VSCs utilize the VMBus driver.
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.Sh SEE ALSO
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.Xr hv_ata_pci_disengage 4 ,
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.Xr hv_netvsc 4 ,
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.Xr hv_storvsc 4 ,
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.Xr hv_utils 4
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