Mgr. Martin Fabuš wrote:
> Hi All,
>
> I would like to configure the Bacula in following way
>
>     * use 2 external hard disks connected over the USB
>     * change these 2 HDDs once per week (let's say on friday afternoon)
>     * every day doing a backup - incremental (of several servers)
>     * once per year do a full backup
>     * if one external HDD dies - I want to loose the backup only for
>       one week
>           o i.e. on every HDD, there should be one full backup
>           o the incremental backup after the disk change (friday)
>             should follow the last increment on that HDD (not on the
>             other one)
>           o one can restore correctly the data only from 1 HDD
>
>
> Is such a configuration possible? If yes give me a rough idea, please. 
> I hope I can find out the details.
>
You could probably do this with 4 pools. Each drive would contain 
volumes in two pools, one for full backups and one for incremental 
backups. For each client there would be two jobs, one backing up to 
drive 1 using pools "full1" and "incremental1" and another backing up to 
drive 2 using pools "full2" and "incremental2". The two jobs for each 
client would use two different schedules so that the jobs run on 
opposite weeks. A schedule for odd weeks of the month might use 
something like Run = Level=Incremental 1st,3rd,5th sun-sat at 21:00. 
Only schedule the daily incrementals, and then run the yearly full 
backups manually.

A year sounds like a long time between full backups. With 180 odd 
incrementals for each client you'll likely run out of disk space on a 
USB drive and defeat the purpose. With differential backups run every 
now and then, you could delete the no longer needed incrementals and 
consolidate space.
>
> Martin
>   

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