I used the newest Intel Storage Manager driver available from Intel to build the TEXTMODE (non-pnp) directory, then modified the .SIF file and booted with PXE. However, the CIW just keeps saying "cannot detect hard disk drives".
I know the M5620 contains an Intel G33 chipset with ICH9R mass storage controller, and this has been defined in the .SIF file as well. I chose this from the TXTSETUP.OEM as the storage controller:
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Intel(R) ICH8R/ICH9R SATA RAID Controller (Desktop/Server/Workstation)
I think it should be working both with ICH8R and ICH9R controllers, but it doesn't. Currently my machine only has one SATA drive attached to the port number 1, while BIOS is claiming the SATA mode to be RAID. For some reason I cannot change that SATA mode setting onto ACHI as the value is just grayed out.
Anyway, I'm a bit clueless here so if any of you guys come up with something I would definitely appreciate