GParted taking forever

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http://askubuntu.com – I'm trying to install ubuntu 12.10 from DVD. Every time I try, I get an I/O error. I've tried replacing the RAM, with no change. I decided I'd try to create a clean HD by booting into liveCD and then running Gparted. However-- gparted just runs with the "Scanning all devices" message forever-- though running fdisk -l from the terminal does find the drive fine. Any thoughts on what's going on? (HowTos)