Drobo

Mirroring two Drobo Pros?

We have a Drobo Pro we are using on our main production file server running off of a Apple Xserve.

Our company has been talking about offsite mirroring of data and is looking to install another DroboPro at a Colocation centre near us.

Our first though is to just rsync ( http://en.wikipedia.org/wiki/Rsync ) the two devices nightly. I was wondering if anyone had a better way to mirroring two DroboPros? Or if the Drobo developers have a better solution?

Drobo Dashboard includes the DroboCopy utility. This will duplicate file from one directory to another. This utility only works on directories - so you could need to have the filesystems for both DroboPros accessible on the one computer. Either directly via iSCSI or a mounted network share.

Personally I think rsync is the way to go.
Rsync has a very useful feature in the --link-dest option which hard-links files that have not changed. You should read up on it if you are not familiar with how it works. This will let you do incremental backups - so rather than a straight mirror you have a proper backup solution with as many days worth of backups as you require using a minimal amount of space.
Rsync can also run over SSH if you require encryption when transmitting the data to your remote location.

Disclaimer: I don’t work for R1Soft or related to this company in any ways such as reselling their software or marketing.
http://kb.r1soft.com/display/TP/rsync+Backup
Just my two cents esepcially for DroboPro users like us who have the genuinely need to protect our business-critical digital asset on the DroboPro and block-level CDP is definitely the way to go. There are over a dozen of vendors develop block-level, disk-based & applicaiton aware w/ full BMR (Bare Metal Recovery) & Replication capabily, AppAssure Replay4, InMage Scout, BakBone NetVault, Microsoft DPM, StarWind Software, Vizioncore vRangerPro etc.