From owner-freebsd-virtualization@FreeBSD.ORG Tue May 7 08:07:53 2013 Return-Path: Delivered-To: freebsd-virtualization@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 16072C56 for ; Tue, 7 May 2013 08:07:53 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-ea0-x22e.google.com (mail-ea0-x22e.google.com [IPv6:2a00:1450:4013:c01::22e]) by mx1.freebsd.org (Postfix) with ESMTP id A1040765 for ; Tue, 7 May 2013 08:07:52 +0000 (UTC) Received: by mail-ea0-f174.google.com with SMTP id f15so132968eak.19 for ; Tue, 07 May 2013 01:07:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:sender:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=9BuTjySuvJxxfXKFCDPDwBmypLToL/pZy1FEO3Zs0rU=; b=K9lqPY3Yd+tEwECrye+At2txkxPebQt/2L5UouqNAzmswRd0CfzDc1XE/zQJScBuuI D/yhV9DzCfi2cPfdAk3eFZV9g8op4C7GzVke+30+f5Vwupm6inqE0hGpLGVm6y4XaJ1Z 65UHRTC4dG3N/yYmGzrmybCftrcR3pYYUecBdtJkwx7dCL5+/kqTMpwFYwN8PKmLd2kl A1acg6JnNnXNDH1ZBFHXZY9RacBFSw1Z0Ded1o8qUs7Nnec/6m0y+w7wAsGXEEnj2xb6 kDq1Blnuk/ten+jkc9dxCps+Pn7Izjx5qsxEB/QDtly6j+pjjRT3aolVHKgHC+kw/3G9 Hh3g== X-Received: by 10.15.32.71 with SMTP id z47mr2960140eeu.3.1367914071818; Tue, 07 May 2013 01:07:51 -0700 (PDT) Received: from mavbook.mavhome.dp.ua (mavhome.mavhome.dp.ua. [213.227.240.37]) by mx.google.com with ESMTPSA id x41sm28886436eey.17.2013.05.07.01.07.49 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 07 May 2013 01:07:50 -0700 (PDT) Sender: Alexander Motin Message-ID: <5188B653.5020207@FreeBSD.org> Date: Tue, 07 May 2013 11:07:47 +0300 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:17.0) Gecko/20130413 Thunderbird/17.0.5 MIME-Version: 1.0 To: Victor Miasnikov Subject: Re: ATA controller and Hyper-V "synthetic storage driver" handle the IDE disks devices ( but not for the CD-ROM) Re: Hyper-V on FreeBSD References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: larry.melia@ieee.org, freebsd-virtualization@freebsd.org X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 07 May 2013 08:07:53 -0000 On 07.05.2013 10:40, Victor Miasnikov wrote: >> prevent default OS driver from attaching to emulated ATA controller >> when Hyper-V > > Disable both primary and secondary ATA controller prevent use CD-ROM > device in VM ( guest) > > Because "synthetic storage driver" not handle CD-ROM devices > ( IMHO, even more: Hyper-V host work with CD-ROM only as "PCI bus" device) Then may be possibility of blocking/hiding specific ATA channels or devices could be investigated. > http://lists.freebsd.org/pipermail/freebsd-virtualization/2013-April/001180.html > > == > . . . > On 23.04.2013 17:07, Larry Melia wrote: > . . . >> Removing our ATA patches, on the other hand, results in a huge >> performance loss. This is because the root file system is managed by the >> ATA driver, which is emulated under Hyper-V. > == > > Place on IDE disk only "\boot" ( and bootloader), other on SCSI . May be instead of splitting filesystem it could be better to boot from "SCSI" completely and forget about "ATA"? Or there is no option ROM for SCSI boot in Hyper-V? -- Alexander Motin