i can't see any of my hard drivers on the installation, but when I run gparted they are both there.
How can I see then on installation or install from live boot via terminal?
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Without any further detail I can only assume these "missing" hard drives are not the ones elementary is installed on correct? Being that they are showing in in gparted leads me to believe that they just are being mounted.
I'll have a guess here, but i can assume its the root cause.
In case your laptop configures your disk as RAID you need to switch it to AHCI in your BIOS setup.
Just go to your bios and look it up, or search the net for your laptop model to see the default configuration. if its Dell XPS i can tell you right now that its configured as RAID.