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Re: [Bacula-devel] backup to removable external disk


On Mon, 2008-09-08 at 11:49 -0400, Dan Langille wrote:
> Peter Sjoberg wrote:
> > I been using bacula to backup my environment to tape for a while but I
> > started to run into problems with size and time and considering changing
> > the way I do backup.
> > I started to read up a little but it's so many options I decided to ask
> > the exports for suggestions.
> > 
> > At the moment I'm backing up everything to DLT 40/80 tapes and despite
> > excluding a lot it takes almost 24h to complete a full backup.
> > I do a full backup once/month and take the tapes offsite for offsite
> > storage. Daily and weekly is stored onsite.
> > Easiest might be to get a bigger/faster tapedrive but the budget for
> > that isn't there so I'm thinking of another solution in using disks
> > similar to using tapes. (1T external disk $200-250CAD, equal in tapes -
> > way more + the tapedrive)
> > 
> > What I'm thinking of is that 
> > I get 3 external disks (USB or eSata, size to be determent)
> > I install latest version of Bacula
> > I hook up 2 of the disks to the server
> > Daily and Differential keeps on going to tape
> > Full goes to the first disk. Once the first disk is filled up it moves
> > to the next disk.
> > When the 1st disk is filled up I remove that off site and put in the 3rd
> > disk. 
> > Once the 2nd disk is filled it moves on to the 3rd disk (which is now
> > connected), I take the 2nd offsite and take back the 1st disk.
> > And so on.
> > In other words, I use the disks almost as if they where tapes.
> > 
> > Is this possible to get working? 
> > I did read about backup to multiple disks and symlinks and stuff but
> > since I changing the disk I don't know if that's the way to go. 
> > Can I somehow fake a autochanger function (autochanger with two slots)
> > and run some script whenever it change disk?
> > Any other suggestions where I can circulate disks in stead of tapes?
> > 
> > As I remember it it was some issues moving between tapes and disks
> > (solved with Migrate?) so maybe I could get another disk just for
> > inc/diff backups to make it a little simpler.
> 
> I suggest this option:
> 
> - Backup up to local HDD (preferably on at least RAID-1)
> - use rsync to mirror those local HDD to external HDD
Maybe - have to think about it a little.
The basic rsync won't work since then I need a one2one copy and then I
would have to have same storage locally as externally, as in 1TB local
+2x1TB external (one onsite & one offsite). Maybe if I create a pile of
directories and only rsync that part or something like that.

> 
> This is much easier to setup from a Bacula point of view.
I guess so

I got pointed to the disk-changer script, will take a look at that and
how I might be able to use it.

> 
> Does that help?
> 

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