How to instal Ubuntu Server 12.04 on DELL server in RAID5?

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http://serverfault.com – I am having trouble installing ubuntu 12.04 server on a new dell server we just bought. When the installer proceeds the the disk set up it sees each individual drive and asks me which one I want to configure. Shouldn't it just see 1 single virtual drive? RAID 5 has been set up in the BIOS and we have 6 x 2TB SATA drives. Any help would be greatly appreciated. (HowTos)