We recently bought a tower server on which I want to install Debian. I thought the device had hardware RAID, as I could see a BIOS screen. As it turns out, it's still a software RAID. When I configure the RAID drives through that firmware, I can still see both hard-drives in the Debian installer. When I try to repartition from within the installer, Debian warns that the software RAID drives would be lost.
I was slightly disappointed by this, as I always thought hardware-RAID would yield better performance. But anyhow, my question now is whether I should use the Debian installer to configure the RAID drives, and disable this "firmware" RAID from the main BIOS? Or should I create separate drives using this firmware, and not use the installer? Are there any reliability benefits of using the firmware?
This firmware version is:
LSI MegaRaid Software RAID BIOS Version A.10.10211615R LSI SATA RAID Found at PCI Bus No:00 Dev No:1F
Update I can see from the comments that others were also confused as to whether I was dealing with a Hardware RAID. The machine I have is a Lenovo ThinkServer TS 440. In its datasheet, it says that is has
Integrated SATA SW RAID 0/1
As I understand, there is a hardware component included in a chip on the motherboard (which is why it has a PCI address?), but is not a typical hardware RAID.