Date: Tue, 20 Jan 2015 20:03:21 +0100 From: Roland Smith <rsmith@xs4all.nl> To: Chris Maness <chris@chrismaness.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Dump/Restore for system migration Message-ID: <20150120190321.GB57651@slackbox.erewhon.home> In-Reply-To: <CANnsUMESEWsEXyyKwqyrnTMiEEYuExTgD0Z4NBuJF0cYSWDChQ@mail.gmail.com> References: <CANnsUMESEWsEXyyKwqyrnTMiEEYuExTgD0Z4NBuJF0cYSWDChQ@mail.gmail.com>
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--NDin8bjvE/0mNLFQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 19, 2015 at 10:50:28AM -0800, Chris Maness wrote: > I have used dump/restore for system migration a couple of time and noticed > it is pretty good, but every once in a while it will miss or corrupt a > file. Is there a better way to do this? I would imagine having a system > mounted r/o would help, but this is not always possible. Nevertheless this is the best way to go. Especially if you use UFS with journaled soft-updates (which is the default now, IIRC) where you cannot use snapshots. If I want to dump the filesystems on a machine, I use init(8) to go so runlevel 1 (single user mode), where the root fs is mounted r/o and the rest is unmounted. I mount /tmp, and dump the rest of the filesystems to files in /tmp. That procedure has never failed for me. > Is there a way to > check the deltas between systems manually after migration to see if any > files need to be merged or copied. I would imagine the files that are in > jeopardy are ones that are being written to while the dump is taking > place. I had a file the keeps track of rss feeds end up missing on the > target system. For copying files between running systems, I tend to use rsync(1). If anything was being modified during the first run, a second run will usua= lly fix it. Roland --=20 R.F.Smith http://rsmith.home.xs4all.nl/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 5753 3324 1661 B0FE 8D93 FCED 40F6 D5DC A38A 33E0 (keyID: A38A33E0) --NDin8bjvE/0mNLFQ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABAgAGBQJUvqZ5AAoJEED21dyjijPgcegP/1WlwkfSBRNHh3kyvP4h3/GX UzASsVKkZ5CqJs+rr/95u++LinwFxNJJM5n5ndTIjCYG8jp00drJGxg34M7z0o6R PHfL7Dmlr+w6gFqw+FRciph7kE2MK/3bbNmUTV05/szlL6hLpegkRCYeKUZWxGP3 +DgyOyj3oMyt0rUm+RorjmJfB9Y69L9qtrA5A5C+SWg6j2s1BLbbLq+qn4gMv5L+ AWsxCs3PYhCsjd5BlNH58AKf/UOo2lnIa3bWxrwuRrmbUZl4rz4Mj8tz/UHmRTI8 MSpYJ9J2eUQ34FJNTPsd7oYhHawzlPurbnkzI1sMcJ0MWHmaH5PyWEQhKbTM1bxM IOIajBRvxzIryMIeRaRHji42NxRzJKRgf+a6oZA03xoILdrZlZu75JcXn8umFPKQ 247Uq7Yio2Mv/60KUVZXs8WstSi0T9xqQqtmAdtRo/nW1+gxFzG7LuPowDDRGST9 J20QTMGjPiTN7W6Ac0SPtqj4jFPdbjygDVm7dTy3mPyXHs1uDX+uAwPTDRfuhl2d XxKels5bOpetUyNrmeoer2KNdt3smyg0FgcVdVboJF8lOTb8gZQdzNlTmIu81r7R 86xl2jdJ2tn03IPeGpwaVWq98+65igsn4yPdWFUbjLYsoy6I6zuO0mQOguxEQTFG 9hq6oJnwBgK4rXdQLoiG =fAMB -----END PGP SIGNATURE----- --NDin8bjvE/0mNLFQ--
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