Hi Adrian, thanks for your advice, I was actually already thinking of 
switching to a full backup strategy; unfortunately that would not solve 
tho size issue, which at this point is becoming quite puzzling :-)

Cheers,
Alberto


---
Alberto Caporro
Director of Security Services - Consulthink Srl
Via dell'Archivio di Stato, 15
00144 Rome, Italy
http://www.consulthink.it
M. +39 335 1217 394
F. +39 06 4549 2454

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On 5 Apr 2013, at 12:53, Adrian Reyer wrote:

> Hi Alberto,
>
> On Thu, Apr 04, 2013 at 09:03:51AM +0200, Alberto Caporro wrote:
>> I backed up our mail server, which is hosted in a virtual machine
>> with two virtual disks sized at 20G and 200G respectively. I'm only
>> backing up relevant files (/etc, /root and /opt) and measured on the
>> server itself, the total size amounts to slightly more than 56G.
>
> Please rethink that. Unless you took further steps, if your box 
> crashes
> you won't even know which packages have been installed, your /etc will
> be mostly useless. And if you actually know which packages you had
> installed, you would need to reconfigure them with debconf as the
> information from /var is missing.
> I strongly recommend to always backup the whole server. The saved few
> 100MB system data is never worth the time you have to spend resolving
> all these configuration issues.
>
> Regards,
>       Adrian
> --
> LiHAS - Adrian Reyer - Hessenwiesenstraße 10 - D-70565 Stuttgart
> Fon: +49 (7 11) 78 28 50 90 - Fax:  +49 (7 11) 78 28 50 91
> Mail: li...@lihas.de - Web: http://lihas.de
> Linux, Netzwerke, Consulting & Support - USt-ID: DE 227 816 626 
> Stuttgart

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