HPE Proliant DL20 Gen9 Not detecting drives

[RikG]

I'm trying to install Windows 10 Professional (x64) but during the installion there are no drives detected.

I have two 1TB HP drives configured in RAID 1 through Intelligent Provisioning -> Perform Maintenance -> HPE Smart Storage Administrator (SSA)

The Raid controller is of type: Dynamic Smart Array B140i.

After I configured the array, I selected the new logical drive as bootable drive.

How can I get the Windows installation to detect the Logical drive?

[parnassus]

Pretty much you need to (re)install Microsoft Windows 10 Pro attaching the appropriate HPE Dynamic Smart Array B140i device driver during the OS install process: the OS will be then able to correctly recognize (and use) the bootable software RAID 1 volume you initially created through HPE SSA (see, as example, this external content pretty handy to find): I'm pretty sure that explained procedure was already discussed on the HPE Community Forum too...it's a matter to search for.