troubleshooting Question

Unable to detect any hard drive to setup RAID in MegaRAID controller

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free5945Flag for United States of America asked on
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I am in the process of setting up VMware ESXi 4.1 on 2 VM hosts with SAN.  Please see below system specs I have.

Hosts:  2 x IBM system x 3650 M3
SAN: IBM system storage DS3512
SAN connection: 4 x IBM 6Gb SAS Host Bus Adapter & SAS cable
SAN hard drive:  6 x IBM 600GB SAS hard drive ( for RAID 5)

While trying to setup RAID 5 on SAN from my host using WebBIOS of MegaRAID controller utility, I am unable to detect any SAS hard drive attached to SAN.  I have all 6 new SAS hard drives installed and  I can see the controller in BIOS,  but no hard drive is available for RAID configuration.  Wondering if anyone have done the similar setup can help me to figure out what did I miss or what could go wrong?  Thank you in advance.
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