[RndTbl] disk cloning

Montana Quiring montanaq at gmail.com
Fri Jul 24 07:38:16 CDT 2009

FWIW, we use SuperDuper at work and are happy with it.


On Fri, Jul 24, 2009 at 12:42 AM, Adam Thompson <athompso at athompso.net>wrote:

> On Fri, Jul 24, 2009 at 00:29, Robert Keizer <robert at cluenet.org> wrote:
>> Dan Martin wrote:
>> > On a Unix based system such as the Mac, should file level copies be
>> > adequate?
>> For the most part. Especially if you backup the partition tables too. I
>> recommend rdiff-backup, it works great and can copy locally or to remote
>> sites over ssh.
>> > Any suggestions re how to make a clone of my boot drive would be
>> > appreciated.
>> Is clonezilla what your looking for?
>> http://clonezilla.org/
> There are some problems with backing up a Mac (largely thanks to the HFS+
> file system).  The problem is very similar to backing up any UNIX filesystem
> that stores additional metadata beyond the basic stat(2) fields.  Linux
> ACLs, for example, or even worse, EAs (which are often used to store ACLs)
> are not necessarily backed up correctly by [pick your favorite backup
> tool].  Most versions of GNU tar can backup ext3 and XFS ACLs & EAs, and EAs
> on any filesystem with compatible APIs, but from version to version there
> are various limitations that must be addressed.  Many versions of cpio(1)
> don't handle EAs or ACLs.  Pax(1) was written to address many of these
> issues but for incomprehensible reasons isn't present on many UNIX systems.
> Anyway, two (dated, but still relevant) articles on Mac backups:
> http://blog.plasticsfuture.org/2006/03/05/the-state-of-backup-and-cloning-tools-under-mac-os-x
>  http://blog.plasticsfuture.org/2006/04/23/mac-backup-software-harmful
>  http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html
>  http://www.bombich.com/software/ccc.html **note that Bombich disagrees
> with the test results in the first two articles.
> Both SuperDuper and CCC are availabe at no charge for personal use... if
> you don't back up your mac already, USE ONE!
> Note also that many external USB & Firewire drives (esp. LaCie
> branded-drives) come with OS X backup software preloaded.
> --
> -Adam Thompson
> <athompso at athompso.net>
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