I am running the install through a USB Flash drive.
I had Mint 7 x64 installed on sda with customized partitions. I had sdb as a backup drive. So I copied my Home folder to sdb.
sda and sdb are Seagate SATA 2 500 gb 7500 rpm hard drives. The motherboard is a zotac with nVidia 8100 chipset. I have 4GB 1GHz ram. The processor is AMD Phenom x4 64-bit
When I first installed Mint i set up the two hard drives to be a mirror raid in the bios, but kept getting a grub error, so i changed the control back to eide and removed the second drive from the raid settup.
Now when I try to install mint 8 either through a direct install at the first menu, or from within the live version, i cannot install onto sda. When it gets to the gpartition (step 4) it doesn't have the pull down menu. I cannot select anything other than sdb. At first i thought this was because Mint 7 was on sda, so i used gparted within Live to wipe it and set up new tables... still nothing. i've even tried with it totally blank and no partitions set up. I've tried with the drives mounted and not mounted... nothing. It only sees sdb. Even when i choose custom in step 4, it doesn't allow me to select another drive.
Since you suggested the issue was with Ubuiquity, I searched the Ubuntu support forum and found that there are others with the problem http://ubuntuforums.org/showthread.php? ... hard+drive
Here is the suggested fix:
1) Boot into live session with Live CD (without installing)
2) Open a Terminal and run "sudo apt-get remove dmraid"
3) Exit the Terminal and start the Installer by double-clicking on its icon
I will try this tonight and let you know.
Bad news and good news. The above suggestion did not work...
However, I went into gparted and formated the drive as ntfs. Then ran the install program and WALA! it showed up. WOO HOO!