For whoever buys a Dell XPS 8700 in the future:

- Disable secure boot
- Set onboard storage to AHCI instead of RAID; save BIOS settings and reboot
- Zero first and last sector of the 2T drive (in my case, /dev/sda:

fdisk -s /dev/sda

This gives the number of sectors

dd if=/dev/zero of=/dev/sda bs=1024 count=1024
dd if=/dev/zero of=/dev/sda seek=(number_of_sectors – 20) bs=1024 count=1024  # 
slightly more, just to be sure

) 

- Install Fedora 19 and be happy (you might have to explicitly reclaim space 
from /dev/sda, but that's easy from the installer).

Note that the "clean" way

dmraid -r -E /dev/sda

won't work. The installer will die with "error wiping old signatures".

Ciao,

                                        seba

PS: Thanks to Dan Thurman for suggesting Fedora 17: I was able to solve the 
problem digging the message error given by the installer and chasing links. The 
fact that newer versions of the installer skip the drives *without any error or 
warning message* is a regression IMHO.

PPS: I have no idea as to whether the 32GB SSD cache is being used.
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