Date: Sun, 05 Mar 2000 16:17:43 -0700 From: Chris Fedde <chris@fedde.littleton.co.us> To: "Kevin Oberman" <oberman@es.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Copying partitions Message-ID: <200003052317.e25NHhT32303@fedde.littleton.co.us> In-Reply-To: Your message of "Sat, 04 Mar 2000 20:32:48 PST." <200003050432.UAA31562@ptavv.es.net>
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"Kevin Oberman" writes:
+---------------
| With the low price of disk drives and the high price of both tape
| drives and media, I have decided that a disk is the most cost
| effective backup medium I can buy.
+---------------
I've been making clones of drives using dd for years. I've even
used dd to make clones of drives with windows partitions. If the
geometry of the two drives is identical you can simply use something
like
dd if=/dev/da0c of=/dev/da1c
to cause drive1 to be a fully bootable and identical copy of drive0.
Obviously, do this in single user mode if drive 0 is mounted.
If you want to insure that the data is mobile to different drive
geometries then you can use any of the file archive commands. I
prefer pax(1) because it is as flexible as cpio but has a more
rational command line and creates normal tar files (by default).
To mirror hierarchies I usually run
cd /soure
pax -rwvpe . /dest
This creates /dest/... with all permissions and attributes identical
to the /source.
Generally I store tar.gz files created using something like
cd /
pax -w -X . | gzip > /disk/3/backup/root`date +%Y%m%d.tar.gz`
rather than 'mirroring' partitions. The tar.gz take up less space and can't
be confused with the "real" hierarchies.
chris
__
Chris Fedde <chris@fedde.littleton.co.us>
303 773 9134
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