We have X8DTL-IF - MB with SATA HDD
1. We need to install Windows 2003 EE 32bit - with Raid5.
2. Per OS compatiability chart for Windows 2003 EE SATA (w/ RAID, Adaptec/LSI code base/MCP55/Marvell) - But on Adaptec only 0 & 1 is appearing on the raid configuration.
3. Do we have to look out for an add-on card for raid 5 key?
For RAID 5, you can choose Intel codebase in BIOS SATA configuration section, and install the driver from the link below during install:
https://www.supermicro.com/wdl/driver/SATA/Intel_ICH10R_RAID/Windows/10.6.0.1002/