From owner-freebsd-virtualization@FreeBSD.ORG Tue May 7 09:01:04 2013 Return-Path: Delivered-To: freebsd-virtualization@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 439D92EE for ; Tue, 7 May 2013 09:01:04 +0000 (UTC) (envelope-from vvm@tut.by) Received: from mail-bk0-x233.google.com (mail-bk0-x233.google.com [IPv6:2a00:1450:4008:c01::233]) by mx1.freebsd.org (Postfix) with ESMTP id C4107A13 for ; Tue, 7 May 2013 09:01:03 +0000 (UTC) Received: by mail-bk0-f51.google.com with SMTP id ji2so152282bkc.10 for ; Tue, 07 May 2013 02:01:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tut.by; s=google; h=x-received:message-id:from:to:cc:references:subject:date :mime-version:content-type:content-transfer-encoding:x-priority :x-msmail-priority:x-mailer:x-mimeole; bh=FP5jgfUcKsI6LCQPb3qyN/US/hoED2N717qswzUnxNw=; b=KsqTGgfsjui9U9g7sqORyTtas+NguWqSKoQEHHJBpWEu4hTC2A5k1yczQedxoiy5zZ tdYAHwCuW6naNk3ab/YnJV2gL2NBaVlH8eFVTYGIsk0uTF3jpcI5pgxQHmVpnK5CIoGY zqnA2PG/rMm1YdE5QUC85Cpd6xtW21shuscE4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:message-id:from:to:cc:references:subject:date :mime-version:content-type:content-transfer-encoding:x-priority :x-msmail-priority:x-mailer:x-mimeole:x-gm-message-state; bh=FP5jgfUcKsI6LCQPb3qyN/US/hoED2N717qswzUnxNw=; b=MW+ArpFs/wk3lp67v76ZHnmWcPR87PZAQAq9+a9+HzrMWpZCcyGWM3ueFdNDBsEVA5 wwV/vEXqRr+qt+YR22L5knh6TJSujn4zt12YMoiSdObsBrfurHpCPWFOcD4vOm/jPPFN BQ/YTgfP9FqtzI+OWusSyNSD2EKZEAYz6bgJtRKjP+xRXy7jwpW3uB+fkjDWmFAOHblf HjFmSVzC2BArwgTH0o7zsLi3zf6UiboxUpjb1GWlASjrFEcktHZ2LN0tQ01az6/6gJuL eXhqelK8heEYhP5cfeD9DfZoWQRLs2bRns1egtaQg6Dsm56WugZ5QxQq/uTkiUjUcjkL XWmw== X-Received: by 10.204.169.137 with SMTP id z9mr305040bky.33.1367917262317; Tue, 07 May 2013 02:01:02 -0700 (PDT) Received: from TSVVM2 (ns1.st.by. [217.23.123.90]) by mx.google.com with ESMTPSA id tl1sm6312238bkb.7.2013.05.07.02.00.58 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 07 May 2013 02:01:01 -0700 (PDT) Message-ID: <528D3052346640EBAD35D64A806F22BE@local.st.by> From: "Victor Miasnikov" To: "Alexander Motin" References: <5188B653.5020207@FreeBSD.org> 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 Date: Tue, 7 May 2013 12:00:56 +0300 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.3790.4548 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.4913 X-Gm-Message-State: ALoCoQnG9SN7hRwufahfGzyVtLQFeHNzykGRgtwIBn8vw7rtMMOlwwvJddZMGl/blH8rivR2fO5l 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 09:01:04 -0000 Hi! > 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) > A.M.> Then may be possibility of blocking/hiding specific ATA channels or A.M.> devices could be investigated. IMHO, this ( or some like this) must be investigated In any case, need carefully testing work CD-ROM ( primary for LiveCD and (or) .ISO for setup FreeBSD) in Hyper-V enviroment >> http://lists.freebsd.org/pipermail/freebsd-virtualization/2013-April/001180.html >> >> == >> . . . >> On 23.04.2013 17:07, Larry Melia wrote: >> . . . L.M.>>> Removing our ATA patches, on the other hand, results in a huge L.M.>>> performance loss. This is because the root file system is managed by the L.M.>>> ATA driver, which is emulated under Hyper-V. >> == VVM>> VVM>> Place on IDE disk only "\boot" ( and bootloader), other on SCSI . VVM>> A.M.> A.M.> May be instead of splitting filesystem it could be better to boot from A.M.> "SCSI" completely and forget about "ATA"? A.M.> Or there is no option ROM for SCSI boot in Hyper-V? A.M.> Yes, boot from SCSI disk in Hyper-V VM ( "guest") is impossible Best regards, Victor Miasnikov Blog: http://vvm.blog.tut.by/