Hello Dan,
sounds great but wont fit to my situation. I must admit I messed up
describing the problem correctly. I'm sorry for that, here is additional
information:
The backup server runs a raid5 on an 8 port raid controller with 4 1TB
hdd's. I divided the backup data in VIP-Data and ordinary-Data cause of
budget issues... Ordinary Data is currently something around 0,7TB (as
described earlier VIP data is 1.4 TB) so both VIP and ordinary data wont fit
to the 2 TB USB hdd's. We are also using LVM's in the backup server to make
the process of extending the disk space of the server as easy as possible. I
thought about building a LVM over the 2 disks (another one for the other 2
disks) but I'm scared of possible data loss, if on hdd crashes. I think i
need something like virtual auto-charger using usb hard drives as "tape".
This way i could use the disks as "tapes". I searched through the manual
(pdf version) but did not find something appropriate. 


Dan Langille wrote:
> 
> richard.hauswald wrote:
>> Hello list,
>> i'm new to this list, so here's a short introduction of mine: Name:
>> Richard,
>> Job: Software Developer(Java), Origin: Germany
>> 
>> I'm also responsible for the IT infrastructur of our company, so I have
>> to
>> deal with backups. I have a running bacula setup
>> which backups several machines on a weekly differential schedule based on
>> 15
>> volumes. Additionally we run several servers outside
>> the companies network. For security reasons on each of the external
>> machines
>> a seperate bacula setup is running doing the same stuff.
>> The local bacula server collects the external backups to its own hard
>> drive
>> via rsync.
>> 
>> Now we reached the point where we want so have a copy of the backups
>> stored
>> in a seperate place. Problem is a small budget and 1,4TB
>> of data which needs to be stored outside. My plan: 4 external 1TB hdds, 2
>> are connected to the backup server and the other two are
>> stored in a different secure place(of course the need be cycle...). Now
>> my
>> question is, how to set up a job, volumepool and storage config,
>> to let bacula backup the backups to the external drives and automaticly
>> writing to the second hdd if the first is full.
> 
> I suggest a slightly different approach, but I don't know if it meets 
> your needs.
> 
> Use the two external HDD as mirrors of the internal drives.  Let Bacula 
> use only the internal drives.  With this approach:
> 
> - you always have the latest and greatest backups online and directly 
> available
> - you have a copy of those backups offline
> - Bacula doesn't need to know anything about the offline backups
> 
> You will only ever *need* the offline backups (i.e. the external HDD) if 
> the internal HDD fail.  In which case, you COPY from from the external 
> HDD to the internal HDD and off you go.
> 
> How does that sound?
> 
> -- 
> Dan Langille
> 
> BSDCan - The Technical BSD Conference : http://www.bsdcan.org/
> PGCon  - The PostgreSQL Conference:     http://www.pgcon.org/
> 
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