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Bios refuses to boot from SSD via add in card
Hi I have an old Alienware area 51 which I have upgraded to win10. I have two 500gb sata drives in raid 0 connected via motherboard the raid is via the onboard raid controller. I have installed a new ssd via an add in card. I have installed a clean install of win 10 on the ssd but the bios refuses to boot from this drive it boots from the old drives instead.
If the old drives are not connected it boots from the ssd. I can see the ssd as a drive when it boots from the old install. If I select ssd as first boot pirority it still boots from the old raid instead and when I go back into the bios the boot order will be switched around. I'm presuming there is no way of fixing this short of wiping the old drives and switching where the drives are plugged in but if there is any help would be appreciated. Wanted to boot with the ssd and leisurely pick through the carcass of the old drives before wiping them eventually.