Date: Tue, 7 May 2013 12:00:56 +0300 From: "Victor Miasnikov" <vvm@tut.by> To: "Alexander Motin" <mav@FreeBSD.org> Cc: larry.melia@ieee.org, freebsd-virtualization@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 Message-ID: <528D3052346640EBAD35D64A806F22BE@local.st.by> References: <A45F0063B66A43ECBA57AFCAA57676DD@local.st.by> <5188B653.5020207@FreeBSD.org>
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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/
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