On 7/14/11 4:56 PM, Ken Mandelberg wrote:
> We currently backup our department network running Legato networker with
> backup to a raided disk array (advanced file device in their jargon)
> followed by cloning to a Qualstar/SAIT2 tape library.
>
> Our backup needs are increasing and we don't want to buy licenses for
> more file device space or more tape slots. We would like to go with
> Bacula and have no limits.
>
> In fact since SAIT has dead ended and its not clear to me if Bacula
> supports Qualstar, I wonder about an all disk solution.
>
> Under Legato the license restriction artificially keep the "file-device"
> small relative to the tape storage. However, these days disks are
> cheaper than tapes and license free we could afford a lot of disk space.
>
> However, the second feature of the tapes is that if the "file-device"
> fails (even raid fails), we can transparently go to tape. It also
> affords the option of off site copies of the tapes.
>
> Is there any strategy for Bacula that adds the reliability we would lose
> by abandoning the tapes. Perhaps a second redundant array combined with
> some removable drives for off sites?
>
>
Ken,

You will have to change the way you look at backups. Use the RAID but 
also consider an off-site disk arrangement - depending upon what kind of 
environment you are in and the size of data. You could purchase a 
supported model tape drive if you need to keep your current arrangement. 
Although disks and Bacula provide freedom, you gain the headache of 
having to think about how to architect a solution.

Mehma




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