Not really. As long as you build in redundancy. Ie, automatically distribute multiple copies of the same files or blocks over multiple different sites. Yes, all

Not really. As long as you build in redundancy. Ie, automatically distribute multiple copies of the same files or blocks over multiple different sites. Yes, all of the sites could make breaking changes at the same time, but then all of the disks in your raid array could die at the same time too... Hence backups.