-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

============================================================================= FreeBSD-EN-17:03.hyperv Errata Notice
The FreeBSD Project

Topic: Compatibility with Hyper-V/storage after KB3172614 or
KB3179574

Category: core
Module: hyperv/storvsc
Announced: 2017-02-23
Credits: Microsoft OSTC
Affects: FreeBSD 11.0-RELEASE
Corrected: 2016-10-19 07:43:39 UTC (stable/11, 11.0-STABLE)
2017-02-23 07:11:48 UTC (releng/11.0, 11.0-RELEASE-p8)

For general information regarding FreeBSD Errata Notices and Security Advisories, including descriptions of the fields above, security
branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>.

I. Background

Hyper-V is a default hypervisor provided on Windows server by Microsoft.
ATA driver is the legacy storage driver for FreeBSD on Hyper-V, now they
are replaced by synthetic driver which has better performance. There are
issues when attaching synthetic storage driver for FreeBSD 11 on some of Hyper-V hosts.

II. Problem Description

There are some compatibility issues with the FreeBSD Hyper-V driver,
which will cause the OS disk to be detached if August 2016 update rollup
is applied on Windows host (KB3172614 or KB3179574).

III. Impact

FreeBSD 11.0 can not be installed on a guest system on Hyper-V host.

IV. Workaround

On Hyper-V connection, when the installer boot prompt, select

3. Escape to the loader prompt

Then:

set hw.ata.disk_enable=1
boot.

Note: this workaround force FreeBSD to use legacy storage driver
which is much slower than synthetic driver.

V. Solution

Perform one of the following:

1) Upgrade your system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date.

Afterward, reboot the system.

2) To update your system via a binary patch:

Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

Afterward, reboot the system.

3) To update your system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

# fetch https://security.FreeBSD.org/patches/EN-17:03/hyperv.patch
# fetch https://security.FreeBSD.org/patches/EN-17:03/hyperv.patch.asc
# gpg --verify hyperv.patch.asc

b) Apply the patch. Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile your kernel as described in <URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
system.

VI. Correction details

The following list contains the correction revision numbers for each
affected branch.

Branch/path Revision
- ------------------------------------------------------------------------- stable/11/ r307617 releng/11.0/ r314125
- -------------------------------------------------------------------------

To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:

# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base

Or visit the following URL, replacing NNNNNN with the revision number:

<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

VII. References

<URL:https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212721>

<URL:https://support.microsoft.com/en-au/help/24717/windows-8-1-and-windows-server-2012-r2-update-history>

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.1.18 (FreeBSD)

iQIzBAEBCgAdFiEEHPf/b631yp++G4yy7Wfs1l3PaucFAliujNwACgkQ7Wfs1l3P auea7BAAtYKNH1OVGWZ2frFoaVAuzLA0Gow599XCM5ycF39HTlavmoR1+KN9g8Gh r2wEBvIM/Yzla16mmLEzt7QLeSFMP1mgVb1lUtvAp62b/lzb2ImIvL3qhury0nop eczup/A/nFOOgOa/IEMsxqi5noB5e2ODkWEOayiLNd5fmD/BF+yACEKi0YI0krQY Oonq4N9ah7z4rT8OYC2LNQPvc00ZAAq9eq/IDdtWDvLgpxOF1W+dJ0MAzLhQwNJn 9cdW13AcrdJHxzyjAGeOd1pedWFs0ueEXLI+J5pVOvpZd3WeAc9Fls8t7GNgYwvf dpf9uaB765n5tZCa+gc8h2eSzY59aEAQOtHXTqlMGp3ACl7D7Gjmhh42Vp4fgySb zeeKEqAnNay4NdBEGt/U9CjycNKMKi6/bqLpEq3rxu8QFPzeXuwIB3favj8MpIUI ZMda4CQ1E9XLgG6YoupSpnVSbvNFZIEQ2RHzZesKlIoQIM4OPSBWPGjSR9UDMNKH mxb/cWMwO9N4G7xzKSULuIAF33wZYkaKqTfzOKVtOEZ7hlBPlqzfXK2MNqlbc0PO 3bqPvrg8KXL8OyswEy0sZaptQs/jTUZjqI9/JNWY+IdRR1clVrRdpg/YWljwqqvb hFIarahbNC1fvsMTeAFq8QBGXkoy6ovmjpKrhBfPNpaiL5ccuWU=
=nMwL
-----END PGP SIGNATURE-----
_______________________________________________
freebsd-announce@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-announce
To unsubscribe, send any mail to "freebsd-announce-unsubscribe@freebsd.org"

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)