You won't see Drives from an hba, in your bios. Those drives aren't plugged into a controller managed by your bios.
Do you see them if you boot into Linux and run lshw, or if you go into the bios for the controller card?
If you don't get prompted or see the controller bios loading, you may need to enable something like "option Rom" in your normal bios.
Not necessarily spin up, no. My experience with lsi cards is they don't spin up the disks until the card is initialized.
If your mobo bios isn't loading the card bios right after post and before os loading, the disks might not spin up until a driver is loaded.
I always enable the bios on mine so I'm not 100% on this, but I think this is correct.