I had the same problem with 10.04 booting from an USB stick.
I wanted to install on a PATA HDD (/dev/sda) that would never show up in the devices proposed for installation.
gparted showed the HDD though.
I tried with and without an additional SATA HDD in the machine with no result.
Running the liveCD then sudo apt-get remove dmraid (as explained in post #28) made /dev/sda to show up in the installer.
Installation on the way.
Thank you for the wrokaround !
I had the same problem with 10.04 booting from an USB stick.
I wanted to install on a PATA HDD (/dev/sda) that would never show up in the devices proposed for installation.
gparted showed the HDD though.
I tried with and without an additional SATA HDD in the machine with no result.
Running the liveCD then sudo apt-get remove dmraid (as explained in post #28) made /dev/sda to show up in the installer.
Installation on the way.
Thank you for the wrokaround !