Hard drive not detected during Debian installation

[xmuzukerx]

I'm having problem in installing debian wheezy 7.5.0 on Supermicro server running on raid 1 whereby the hard drive is not detected. This server is running 2x 600GB hdd and i'm using DVD images of debian-7.5.0-amd64 and set boot into the thumbdrive due to the server does not have any cd drives. The installation went ok until i reached into partition section whereby the drives is not there to be selected

I've tried to use debian-7.5.0-amd64-netinst but still the same thing happened

Can i know what should i do? please help me thx

My server details:
Supermicro SC813MTQ-R400CB
8GB Ram
2x 600GB HDD

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