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Disaster Recovery by Google - Google Apps (Premier) werden Disaster-Proof.

At the low end a company might tier the number of times they replicate data, and at the high end they’ll make several copies of the data for everyone. We also replicate all the data multiple times, and the 25GB per employee for Gmail is backed up for free. Plus you get even more disk space for storage-intensive applications like Google Docs, Google Sites and Google Video for business. Other companies may offer cloud computing solutions as well, but don’t assume they backup your data in more than one data center.