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Date:      Fri, 16 Oct 2009 08:34:02 -0600 (MDT)
From:      Warren Block <wblock@wonkity.com>
To:        Nerius Landys <nlandys@gmail.com>
Cc:        Jerry McAllister <jerrymc@msu.edu>, questions@freebsd.org
Subject:   Re: Best procedure for full backup of live system
Message-ID:  <alpine.BSF.2.00.0910160818010.82691@wonkity.com>
In-Reply-To: <560f92640910160012k6877b82ah5899405418f7c0e7@mail.gmail.com>
References:  <560f92640910142042tc46f1e3lb81ac1e4528a44ab@mail.gmail.com> <20091015143947.GB54613@gizmo.acns.msu.edu> <560f92640910151742h33393131j9974c23db37602b8@mail.gmail.com> <alpine.BSF.2.00.0910152049340.80320@wonkity.com> <560f92640910160012k6877b82ah5899405418f7c0e7@mail.gmail.com>

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On Fri, 16 Oct 2009, Nerius Landys wrote:

> Thanks again guys.  My final series of steps to take full backups:
>
> bsdlabel ad4s1                    | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/bsdlabel_ad4s1
> dmesg -a                          | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/dmesg
> dd if=/dev/ad4 bs=512 count=1     | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/MBR
> cat /etc/fstab                    | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/fstab
> dump -0Lan -f - / | gzip          | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/dump0-root.gz
> dump -0Lan -f - /tmp | gzip       | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/dump0-tmp.gz
> dump -0Lan -f - /var | gzip       | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/dump0-var.gz
> dump -0Lan -f - /usr | gzip       | ssh -p 22222 nlandys@localhost dd
> of=/home/nlandys/backup/dump0-usr.gz
>
> ... where port 22222 on localhost is a pipe to my remote desktop with
> the 500 GB harddrive.  If I missed anything important please let me
> know.

The dump man page recommends always using -C with snapshot dumps.

The Handbook has an example of dump over ssh that shows a couple of 
speed optimizations:

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/backup-basics.html#AEN25817

gzip -2 and bluefish instead of 3des should be faster than the default.

-Warren Block * Rapid City, South Dakota USA
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