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Date:      Fri, 28 Sep 2012 01:30:50 +0200
From:      =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To:        Pawel Jakub Dawidek <pjd@FreeBSD.org>
Cc:        Jonathan Anderson <jonathan.anderson@cl.cam.ac.uk>, John Baldwin <jhb@freebsd.org>, Ben Laurie <benl@freebsd.org>, freebsd-security@freebsd.org, RW <rwmaillists@googlemail.com>, Mariusz Gromada <mariusz.gromada@gmail.com>
Subject:   Re: Collecting entropy from device_attach() times.
Message-ID:  <86bogrvyad.fsf@ds4.des.no>
In-Reply-To: <86mx0eqsgy.fsf@ds4.des.no> ("Dag-Erling =?utf-8?Q?Sm=C3=B8rg?= =?utf-8?Q?rav=22's?= message of "Tue, 25 Sep 2012 12:58:37 %2B0200")
References:  <20120919231051.4bc5335b@gumby.homeunix.com> <20120920102104.GA1397@garage.freebsd.pl> <201209200758.51924.jhb@freebsd.org> <20120922080323.GA1454@garage.freebsd.pl> <20120922195325.GH1454@garage.freebsd.pl> <505E59DC.7090505@gmail.com> <20120923151706.GN1454@garage.freebsd.pl> <5060D723.6020305@gmail.com> <CAG5KPzxf0Rfufk5K6Jt4e85xc7zXY_B3a2Sq0Uf_uVLHbV-baw@mail.gmail.com> <86r4pqqwnm.fsf@ds4.des.no> <20120925102240.GC1571@garage.freebsd.pl> <86mx0eqsgy.fsf@ds4.des.no>

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I now have two EPIAs, a laptop and a VirtualBox VM gathering data using
this patch:

  http://people.freebsd.org/~des/software/attachtimes.diff

If you want to join in, here's how to prepare a USB stick:

  fetch http://people.freebsd.org/~des/software/attachtimes.tgz
  dd if=3D/dev/zero of=3D/dev/da0 bs=3D1m count=3D1
  gpart create -s gpt da0
  gpart bootcode -b /boot/pmbr da0
  gpart add -b 34 -s 94 -t freebsd-boot da0
  gpart bootcode -p /boot/gptboot -i 1 da0
  gpart add -t freebsd-ufs da0
  newfs -Uj /dev/da0p2
  mount -t ufs /dev/da0p2 /mnt
  tar zxf attachtimes.tgz -C /mnt
  sed -i.orig -e 's/ada0/da0/' /mnt/etc/fstab
  umount /mnt

or a VirtualBox disk image:

  fetch http://people.freebsd.org/~des/software/attachtimes.tgz
  rm -f attachtimes.img
  truncate -s 4G attachtimes.img
  mdconfig attachtimes.img
  gpart create -s gpt md0
  gpart bootcode -b /boot/pmbr md0
  gpart add -b 34 -s 94 -t freebsd-boot md0
  gpart bootcode -p /boot/gptboot -i 1 md0
  gpart add -t freebsd-ufs md0
  newfs -Uj /dev/md0p2
  mount -t ufs /dev/md0p2 /mnt
  tar zxf attachtimes.tgz -C /mnt
  vi /mnt/boot/loader.conf
  # remove the ata hint
  umount /mnt
  mdconfig -d -u 0
  VBoxManage convertfromraw attachtimes.img attachtimes.vdi

The kernel and binaries in the tarball are 32-bit.  The updated patch is
at http://people.freebsd.org/~des/software/attachtimes.diff.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no



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