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Date:      Fri, 04 Jan 2002 23:34:22 -0700
From:      Chris Fedde <chris@fedde.littleton.co.us>
To:        Sean Ellis <sellis@telus.net>
Cc:        "ScaryG" <freymann@eagle.ca>, freebsd-questions@FreeBSD.ORG
Subject:   Re: Mirroring Hard Disk 
Message-ID:  <200201050634.g056YMx91713@fedde.littleton.co.us>
In-Reply-To: <62178761821.20020104222538@telus.net> 

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On Fri, 4 Jan 2002 22:25:38 -0800  Sean Ellis wrote:
 +------------------
 | When I recently asked about cloning a hard drive I was offered a
 | couple of leads for a daily mirroring of a hard drive. I'm not
 | sure if mirroring the drives on a daily basis would be suitable for
 | what jacks is asking about, but I'd be interested for any comment on
 | using rsync or dd as means of keeping two drives relatively
 | synchronized.
 +------------------

Depending on your needs, and your availability requirements, I'd
think of using dump | restore.  You can use dd to do this kind of
thing but it will copy the whole disk (or partition).  Including
all the parts that have not been used yet. this can take a long
time. Plus dd does not have any way to do incremental backups.  A
big time saver for the huge modern drives.

Rsync and rdist are good options too if you want to operate on a
directory hierarchy basis. Dump/Restore work on a file system basis.

--
    Chris Fedde

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