linux-kernel - Re: I give up

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Date:	Wed, 11 Apr 2007 19:03:19 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Krzysztof Halasa <khc@...waw.pl>
cc:	"John Anthony Kazos Jr." <jakj@...-k-j.com>,
	Phillip Susi <psusi@....rr.com>,
	Gene Heskett <gene.heskett@...il.com>,
	linux-kernel@...r.kernel.org, Olaf Hering <olaf@...fle.de>,
	Dave Dillow <dave@...dillows.org>,
	Dave Jones <davej@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Jeff Garzik <jeff@...zik.org>
Subject: Re: I give up


On Apr 11 2007 18:43, Krzysztof Halasa wrote:
>"John Anthony Kazos Jr." <jakj@...-k-j.com> writes:
>
>> I think that's especially true. If a user begins with a single full disk 
>> for their entire filesystem, uses tar to backup, and then later adds a 
>> second disk, copies everything from /usr and /home onto partitions there 
>> (making sure to preserve all interesting bits like ctime/mtime), and 
>> mounts them over the original directories, tar should not decide that 
>> every file in /usr and /home was deleted and recreated.
>
>That wouldn't work, even if you managed to copy ctime, the target
>inode number will be different than the original and backup has
>to assume it's a different file.

Time for rsync and/or rsync -c. And some target filesystem that is
fused to a [can-be-]non-solid archive, like 7z.


Jan
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