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RAID 5 with hot spare or RAID 6 for Production System running two virtual Servers

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http://serverfault.com – We are buying a dual hex core ibm x3650 with 64 GB RAM and 7x300 GB HDD. This server is hosting two virtual servers, web server and database server. I am using Double take high availability to replicate the database into a different physical machine. Veeam is used to backup the virtual servers every night. I was wondering which RAID configuration is best for the environment. RAID should meet the following requirements: At the time of failure or rebuilding the array, less chance of data corruption. Otherwise corrupted data will be replicated to another system As these are production sy (HowTos)